Herbicidal composition comprising oxadiazon, bensulfuron-methyl and penoxsulam

Abstract

The present invention relates to a stable synergistic herbicidal composition for synergistic and effective control of various weeds including but not limited to Grassy Weeds and Broad Leaf Weeds. The present invention also relates to a method for preparing stable synergistic herbicidal composition for synergistic and effective control of broad spectrum of weeds.

Description

[0001] HERBICIDAL COMPOSITION COMPRISING OXADIAZON,BENSULFURON-METHYL AND PENOXSULAM

[0002] FIELD OF THE INVENTION

[0003] The present invention relates to a field of agrochemicals, particularly to herbicidal compositions. More specifically, the present invention relates to a stable synergistic herbicidal composition comprising A) a compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)-1,3,4-oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives; B) a compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl] methyl]benzoate or its agrochemically acceptable salts, esters and derivatives; and C) a compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5, 8 -dimethoxyfl, 2, 4]tri azolof l,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-l -sulfonamide or its agrochemically acceptable salts, esters or its derivatives for effective control of various weeds. The present invention also relates to a process for preparation of such herbicidal composition for synergistic and efficacious control of various undesirable weeds.

[0004] BACKGROUND OF THE INVENTION

[0005] In the field of agriculture and crop management, numerous factors influence crop establishment, growth, productivity, and final yield. Among these, infestation by weeds and other undesirable vegetation remains one of the most significant and persistent causes of yield loss. Such unwanted plants compete with cultivated crops for essential resources including nutrients, water, light, and space, thereby adversely affecting crop vigor, development, and productivity. In addition, certain weeds may exert allelopathic effects that further impair the growth and health of desirable plant species.

[0006] Effective management of weeds and undesirable plants is therefore critical from both agronomic and economic perspectives to achieve optimal crop performance and sustainable agricultural production. Over the years, a wide range of herbicidal active ingredients and formulations have been developed and deployed, either alone or in combination, to control weeds across different cropping systems. However, the extensive and repeated use of herbicides has resulted in the weed populations exhibiting reduced sensitivity or resistance to existing herbicidal treatments.To address resistance concerns and to improve the breadth and durability of weed control, combinations of multiple herbicidal actives have been proposed in the prior art. Such combinations are intended to enhance efficacy by targeting weeds through different biochemical pathways.

[0007] Nevertheless, many existing herbicidal compositions and mixtures suffer from significant drawbacks. These include limited effectiveness across different weed growth stages, inadequate control of mixed weed flora, increased selection pressure leading to resistance development, and undesirable effects on crops such as phytotoxicity, leaf discoloration, growth suppression, or inconsistent crop safety.

[0008] References may be made to CN 104186502, which discloses herbicidal combinations comprising Compound of Formula I and Compound of Formula III, and to CN107517987, which discloses a pesticide composition containing Compound of Formula III, flufenacet, and Compound of Formula I. Further, such prior-art compositions are associated with drawbacks including sub-optimal control across different weed growth stages, and formulation or performance limitations that restrict their ability to deliver stable, broad-spectrum, and durable weed control. In addition, certain prior-art formulations lack physical and chemical stability, require higher application doses, or have higher environmental impact and fail to provide sufficient desired activity. Consequently, these market-available products fail to fully address the need for a stable, synergistic, and resistance-mitigating herbicidal composition.

[0009] Accordingly, there remains a clear and unmet need in the art for an improved herbicidal composition that overcomes the limitations of existing products. In particular, there is a need for a stable and synergistic herbicidal composition that provides enhanced and broad-spectrum weed control, reduces the likelihood of resistance development, minimizes phytotoxic effects on cultivated plants, and delivers consistent performance at reduced application rates.

[0010] The present invention addresses these needs by providing a novel, stable, and synergistic herbicidal composition comprising mutually compatible active ingredients within defined weight percentage ranges. The composition is designed to target multiple biological pathways in weeds, thereby increasing control efficacy and reducing the probability of resistance development. The synergisticinteraction among the actives enables effective weed management at lower dosages, improved residual activity, and enhanced crop safety. The composition further contributes to improved plant health and yield potential, reduced labor inputs, lower environmental impact, and overall costeffectiveness for the end user, while being environmentally sustainable.

[0011] Although individual herbicidal active ingredients belonging to different chemical classes are known in the art, their standalone use or simple admixture has not adequately resolved the longstanding challenges associated with effective, durable, and safe weed management. Herbicides acting through a single biochemical pathway frequently exhibit limited spectrum of control and are prone to resistance development upon repeated use. Even where combinations of herbicides have been proposed, many prior-art formulations fail to deliver true synergistic efficacy, increased phytotoxicity risk, higher application doses, or formulation instability.

[0012] The present invention represents a significant technical advancement by providing a stable and synergistic herbicidal composition comprising a carefully selected combination of active ingredients having distinct yet complementary biochemical modes of action. In particular, the composition integrates a phenyloxadiazolone herbicide acting through disruption of cell membrane integrity and protoporphyrinogen oxidase inhibition, together with one or more pyrimidinyl sulfonylurea and triazolopyrimidine herbicides acting through inhibition of acetohydroxyacid synthase (AHAS). This strategic combination enables simultaneous interference with multiple essential physiological and metabolic processes in undesirable plants.

[0013] The synergistic effect in the herbicidal composition of the present invention, enables the use of reduced amounts of active ingredients, thereby lowering chemical load, minimizing phytotoxic risk to desirable plants, and improving environmental compatibility.

[0014] Further, the actives selected for the present invention are mutually compatible, allowing formulation into a stable composition that maintains physical integrity, uniformity, and biological performance over time. The inventive composition provides effective weed suppression without causing adverse effects such as crop injury, discoloration, or growth retardation, and contributes to improved plant vigor and yield potential. The enhanced efficacy and selectivity also translateinto operational benefits, including reduced need for repeated applications, lower labor input, and improved cost efficiency for end users.

[0015] A compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)-l,3,4-oxadiazol-2(3H)-one is a phenyloxadiazolone herbicide and used to control bindweed and some annual broad-leaved weeds. It pertains to irreversible cell membrane damage and acting as an inhibitor of protoporphyrinogen oxidase. It is used for the controlling a broad spectrum of weeds such as crabgrass; annual bluegrass; goosegrass; buttonweed; annual sedge, Echinochloa colonum, etc. on a range of crops including turf, sports greens & ornamental grass and shrubs, vines, trees, cereal crops such as Transplanted Rice, Wheat etc.

[0016] Further, a compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2-pyrimidinyl) amino] carbonyl] amino] sulfonyl] methyl]benzoate is an pyrimidinyl sulfonylurea herbicide used to control annual and perennial weeds and sedges. It pertains to a inhibits plant amino acid synthesis - acetohydroxyacid synthase (AHAS). It is an herbicide used for the controlling a variety of annual and perennial weeds and sedges such as pigweed, chickweed, wild mustard, stinkgrass, barnyardgrass, rice flatsedge, dwarf umbrella grass, nut-grass, creeping water primrose, Eudwigia parviflora found in various crops such as cereals especially wheat, rice, Transplanted Rice Pre-emergence (3 DAT), Transplated Rice (post-em 20 DAT) etc.

[0017] Moreover, a compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide is a triazolopyrimidine herbicide used on rice crops for the control of broad-leaved weeds, aquatic weeds and certain grasses. It pertains to inhibition of plant amino acid synthesis due to inhibition of acetohydroxyacid synthase (AHAS). It is used for controlling sedges, broad-leaved weeds including loosestrife, chickweed and clover, aquatic weeds including water plaintain and water hyacinth, certain grasses including barnyard grass, young watergrass, annual blackgrass and buckwheat, Echinochloa spp., Ludwigia spp., found in rice, cereals, orchards, olives, chicory, lawns, etc.

[0018] In view of the drawbacks associated with the prior arts, there exists a need to provide a stable synergistic herbicidal composition for synergistic and effective control of weeds. The present invention satisfies the existing needs, as well as others, and generally overcomes the deficienciesfound in the prior art. The present invention composition is synergistic, efficacious, environmentally friendly, simple to formulate, stable and is safe to use. The inventive composition thus represents a meaningful advancement in the field of herbicidal technology and provides a practical and effective solution to persistent weed management challenges.

[0019] Thus, an herbicidal composition of the present invention aims to overcome the problems of the prior art and provides a stable synergistic herbicidal composition comprising bioactive amounts of A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4-oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives; B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl] methyl]benzoate or its agrochemically acceptable salts, esters and derivatives; and C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives.

[0020] OBJECTIVES AND ADVANTAGES OF THE INVENTION

[0021] The principal objective of the present invention is to provide a novel and effective stable synergistic herbicidal composition demonstrating high efficacy and to provide protection to crops, plants against various weeds.

[0022] It is another objective of the present invention to provide improved, stable and ready to use herbicidal composition having synergistic and superior efficacious properties compared to prior art formulations or mixtures or compositions.

[0023] It is yet another objective of the present invention to provide a novel and effective stable synergistic herbicidal composition demonstrating high efficacy and high selectivity. It is yet another objective of the present invention to provide improved combination of herbicides for broad spectrum control of weeds.

[0024] It is yet another objective of the present invention to provide a method and a stable synergistic herbicidal composition for controlling weeds. Yet another objective of the present invention to provide a novel and effective synergistic herbicidal composition which has both preventive andcurative action and is active against major weeds and that promotes plant health, growth and increases plant, crop yield in the field.

[0025] Yet another objective of the present invention is to provide a composition and method for controlling various weeds in plants, crops and plant propagation materials. Another objective of the present invention is to provide one shot application of novel and effective synergistic herbicidal composition for killing / controlling highly resistant weeds at lower application rates.

[0026] It is another objective of the present invention to provide a novel and effective synergistic herbicidal composition which is environmentally safe, possesses broad spectrum bio-efficacy, is non-phytotoxic and has improved stability during the desired shelf life at various temperature and pH conditions and has enhanced efficacy and penetration capacity and is economically more beneficial.

[0027] It is another objective of the present invention to provide a novel and effective synergistic herbicidal composition which further optionally comprises additives, inert ingredients and / or adjuvants, for providing the enhanced stability, enhanced permeability, improved penetration capacity, uniform spray-ability, improved rain-fastness, enriched biotic factors, better flowability, enhanced spreading or coverage effect, effective storage stability, longer residual effect, improved uptake of active ingredients, and safer to the environment attributes to the composition of present invention.

[0028] Another objective of the present invention is to provide a stable synergistic herbicidal composition comprising A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)-l,3,4-oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives; B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives; and C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives.

[0029] Yet another objective of the present invention is to provide a process for the preparation of a stable synergistic herbicidal composition comprising A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)-l,3,4-oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives; B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives; and C) Compound of Formula III, i.e., 2-(2,2-difhroroethoxy)-N-(5,8-dimethoxy[l,2,4]triazolo[l,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-l-sulfonamide or its agrochemically acceptable salts, esters or its derivatives.

[0030] Some or all these and other objects of the invention can be achieved by way of the invention described hereinafter.

[0031] ADVANTAGES:

[0032] 1. The stable synergistic herbicidal composition of the present invention results in significant lowering the count of weeds such as crabgrass, annual bluegrass, goosegrass, buttonweed, annual sedge, pigweed, chickweed, wild mustard, stink grass, barnyard grass, rice flat sedge, dwarf umbrella grass, nut-grass, creeping water primrose, sedges, broad-leaved weeds including loosestrife, chickweed and clover, aquatic weeds including water plaintain and water hyacinth, certain grasses including barnyard grass, young watergrass, annual blackgrass and buckwheat, Echinochloa crusgalli, Alternanthera sessillis, Ammania bacifera, Broad Leaved Weeds: Caesulia axillaris, Cyperus difformis, Cyperus iria, Echinochloa colonum, Echinochloa crusagalli, Eclipta alba, Fimbristylis miliacca, Grasses: Echinochloa Colonum, Ludwigia parviflora, Ludwigia spp., Leptochloa chinensis, Cynodon dactylon, Cyperus rotundus, Enhydra fluctuans, Marsilea quadrifoliata, Caesulia axillaris, Monochoria spp., Monochoria vaginalis, Scirpus royeli, Sedges: Cyperus difformis, Sphenecelea zeylanica, etc.

[0033] 2. The stable synergistic herbicidal composition of the present invention decreases the chances of resistance against weeds.

[0034] 3. The stable synergistic herbicidal composition of the present invention resulted in significantly lower incidence of herbicidal in various crops such as transplanted rice, transplanted rice pre -emergence (3 DAT), transplanted rice (post-emergence 20 DAT), rice (transplanted), rice (nursery), rice (transplanted rice), Rice (Direct Seeded Rice), turf, sports greens & ornamental grass, plants in non-cropped areas including playgrounds,roadsides, cemeteries, ornamental shrubs, vines, trees, cereals especially wheat, rice, lawns weeds, orchards, olives, chicory, etc.

[0035] 4. The stable synergistic herbicidal composition of the present invention shows to have an improved stability during desired shelf life and promotes plant health and increases plant yield in the field.

[0036] 5. The stable synergistic herbicidal composition of the present invention shows no phytotoxicity effect and provide a stable synergistic herbicidal composition that shows technical advancement over the existing combination of herbicides and also shows to has an improved rain fastness.

[0037] SUMMARY OF THE INVENTION

[0038] Accordingly, the main aspect of the present invention is to provide a stable synergistic herbicidal composition having high weeds control efficacy.

[0039] Accordingly, the present invention relates to a stable synergistic herbicidal composition comprising

[0040] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;

[0041] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives; and

[0042] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8- dimethoxy [ 1,2,4]triazolo[ 1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene- 1- sulfonamide or its agrochemically acceptable salts, esters or its derivatives.

[0043] In another aspect, the present invention provides a stable synergistic herbicidal composition comprising:

[0044] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives;

[0045] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8- dimethoxy [ 1,2,4]triazolo[ 1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene- 1- sulfonamide or its agrochemically acceptable salts, esters or its derivatives; and

[0046] D) One or more agrochemically acceptable excipients.

[0047] In another aspect, the present invention provides a stable synergistic herbicidal composition comprising:

[0048] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;

[0049] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives;

[0050] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives; and

[0051] D) At least one or more additives.

[0052] In one another aspect, the present invention provides a stable synergistic herbicidal composition comprising:

[0053] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;

[0054] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives;C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8- dimethoxy [ 1,2,4]triazolo[ 1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene- 1- sulfonamide or its agrochemically acceptable salts, esters or its derivatives;

[0055] D) Additive selected from Urea clathrate, Organosilicone-based powder adjuvant, tallow amine ethoxylate, ammonium sulphate, and Epoxide soybean oil either alone or in combination thereof; and

[0056] E) One or more agrochemically acceptable excipients.

[0057] In one another aspect, the present invention provides a stable synergistic herbicidal composition comprising:

[0058] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;

[0059] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition; and

[0060] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives, in the range of 0.001-90% by weight of the composition.

[0061] In one another aspect, the present invention provides a stable synergistic herbicidal composition comprising:

[0062] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;

[0063] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemicallyacceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;

[0064] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives, in the range of 0.001-90% by weight of the composition; and

[0065] D) One or more agrochemically acceptable excipients.

[0066] In yet another aspect, the present invention provides a process for preparation of the stable synergistic herbicidal composition comprising:

[0067] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;

[0068] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives; and

[0069] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives.

[0070] In an aspect of the present invention, the present invention provides a stable synergistic herbicidal composition which further optionally comprises additives, inert ingredients and / or adjuvants, for providing the following attributes to the composition of present invention:

[0071] a) improved penetration capacity, and uniform spray-ability,

[0072] b) enhanced stability and permeability, and improved rain-fastness,

[0073] c) enhanced spreading or coverage effect,

[0074] d) improved uptake of active ingredients, better flowability, and high crops specificity, e) enriched biotic factors, effective storage stability, and safer to the environment.

[0075] In another aspect, the present synergistic herbicidal composition is stable and has enhanced shelf life and effectively control wide range of weeds in various crops.In another aspect, the present invention provides a stable synergistic herbicidal composition which has enhanced efficacy and penetration capacity.

[0076] DETAILED DESCRIPTION OF THE INVENTION

[0077] In describing the embodiments of the invention, specific terminology is resorted for sake of clarity. However, it is not intended that the invention be limited to specific terms so selected and it is to be understood that each specific term includes all technical equivalents that operate in a similar manner to accomplish a similar purpose.

[0078] Discussed below are some representative embodiments of the present invention. The invention in its broader aspects is not limited to the specific details and representative methods.

[0079] All technical and scientific terms used herein have the same meanings as commonly understood by someone ordinarily skilled in the art to which the present subject matter belongs.

[0080] The terminology used, in the present disclosure, is only for the purpose of explaining a particular embodiment and such terminology shall not be considered to limit the scope of the present disclosure.

[0081] As used in the present disclosure, the forms "a,” "an," and "the" may be intended to include the plural forms as well, unless the context clearly suggests otherwise. Thus, for example, reference to a composition containing “a compound” includes a mixture of two or more compounds. It should also be noted that the term “or” is generally employed in its sense including “and / or” unless the content clearly dictates otherwise.

[0082] The terms "comprise / comprises", "comprising", “including”, and “having” are open ended transitional phrases and therefore specify the presence of stated features, integers, steps, operations, elements, but do not forbid the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The particular order of steps disclosed in the method and process of the present disclosure is not to be construed as necessarily requiring their performance as described or illustrated. It is also to be understood that additional or alternative steps may be employed.Variations or modifications to the composition of this invention, within the scope of the invention, may occur to those skilled in the art upon reviewing the disclosure herein. Such variations or modifications are well within the spirit of this invention.

[0083] The expression of various quantities in terms of “%

[0084]

[0085] or “%” means the percentage by weight, relative to the weight of the total solution (i.e., % w / w) or volume of total solution (i.e., % w / v), composition unless otherwise specified.

[0086] The term “active ingredient” (a.i.) or “active agent” or “active” used herein refers to that component of the composition responsible for control of various weeds at the same time.

[0087] The term “crop” shall include a multitude of desired crop plants or an individual crop plant growing at a locus.

[0088] The term “synergistic”, as used herein, refers to the combined action of two or more active agents blended together and administered conjointly that is greater than the sum of their individual effects. “Bioactive amounts” as mentioned herein means that amount which, when applied for treatment of crops, is sufficient to give effect in such treatment.

[0089] The term “active ingredient” (a.i.) or “active agent” or “active” used herein refers to that component of the composition responsible for control and killing of weeds.

[0090] The term “control” means to inhibit the ability of weeds to survive, grow, develop and / or reproduce, or to limit the weeds’ related damage or loss in crop plants. To “control” weeds may or may not mean killing the weeds although, it preferably means killing / removal the weeds.

[0091] The term “health of a plant” or “plant health” is defined as a condition of the plant and / or its products. As a result of the improved health; yield, plant vigour, quality and tolerance to abiotic or biotic stress is increased. As a result, the health of a plant is increased even in the absence of weed pressure.

[0092] Accordingly, in an especially preferred embodiment according to the invention, the health of a plant is increased both in the presence and absence of biotic or abiotic stress factors. An increase in plant vigor may for example results in an increased yield and / or tolerance to abiotic or biotic stress.One indicator for the condition of the plant is the yield. “Yield” is to be understood as any plant product of economic value that is produced by the plant such as grains, fruits, vegetables, nuts, grains, seeds, wood or even flowers (e.g. in the case of gardening plants, ornamentals). The plant products may in addition be further utilized and / or processed after harvesting.

[0093] According to embodiments of the present invention, the yield of the target plants treated according to the method of the invention, is increased synergistically.

[0094] According to embodiments of the invention, the plant vigour of the treated plant is increased. In another preferred embodiment of the invention, the plant vigour of the plants treated according to the composition of the present invention is increased synergistically.

[0095] Another indicator for the condition of the plant is the “quality” of a plant and / or its products. According to embodiments of the invention, the quality of the treated plant is increased.

[0096] In preferred embodiment of the invention, the quality of the plants treated according to the method of the invention, is increased synergistically.

[0097] The term rain fastness refers to the ability of a substance to remain effective after being applied to a surface and then exposed to rainfall or irrigation. In other words, it measures how well the substance adheres to the target surface and resists being washed away by water. A low rain fastness indicates that it may be washed off or diluted by rainfall, reducing its efficacy.

[0098] The term " Increased uptake of active ingredient" refers to the enhanced absorption or penetration of the active component of a substance into the target organism (weeds) or plant. This increased uptake can lead to greater effectiveness of the product in controlling various weeds’ species at the same time. It may occur through various mechanisms, such as improved formulation, adjuvants that enhance penetration, or modifications to the active ingredient itself to facilitate absorption. Overall, increased uptake of the active ingredient results in improved performance of the product in achieving its intended purpose.

[0099] The term “benefit: cost” refers to a ratio used in a cost-benefit analysis to summarize the overall relationship between the relative costs and benefits of a proposed composition. If a treatment has a benefit-cost ratio greater than 1.0, the treatment is expected to deliver a positive and better outcome.According to embodiments of the present invention, the yield of the treated plant is increased. According to embodiments of the present invention, there is synergistic and efficacious control of various weeds affecting the plants and crops.

[0100] Another embodiment of the present invention, includes within its scope, all possible salts, esters and derivatives of the active ingredients of the composition.

[0101] It is also to be understood that the terminology used herein is for the purpose of describing particular embodiments of the invention only and is not intended to limit the scope of the invention in any manner. The use of examples anywhere in this specification including examples of any terms discussed herein is illustrative only, and in no way limits the scope and meaning of the invention or of any exemplified term. Likewise, the invention is not limited to various embodiments given in this specification.

[0102] Unless indicated otherwise, the technical and scientific terms employed herein shall be construed in accordance with their conventional meaning as understood by a person skilled in the relevant art. In the event of any inconsistency, the definitions and explanations set forth in the present specification shall prevail.

[0103] The composition or formulation according to the present invention has a reduced or zero phytotoxicity with respect to agricultural crops. This results in the present invention effective and possible in the selective control of weeds.

[0104] It has been observed that the composition of present invention not only provides synergistic effect but also provides anti-aging effect to the crops or plants to which it is applied. In addition, the stable synergistic herbicidal composition of the present invention is effective against all developmental stages of weeds.

[0105] In an embodiment, the present invention provides a stable synergistic herbicidal composition comprising:

[0106] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives; and

[0107] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8- dimethoxy [ 1,2,4]triazolo[ 1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene- 1- sulfonamide or its agrochemically acceptable salts, esters or its derivatives.

[0108] In another embodiment, the present invention provides a stable synergistic herbicidal composition comprising:

[0109] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;

[0110] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives;

[0111] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives; and

[0112] D) One or more agrochemically acceptable excipients.

[0113] In another embodiment, the present invention provides a stable synergistic herbicidal composition comprising:

[0114] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;

[0115] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives;C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8- dimethoxy [ 1,2,4]triazolo[ 1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene- 1- sulfonamide or its agrochemically acceptable salts, esters or its derivatives; and

[0116] D) At least one or more additives.

[0117] In one another embodiment, the present invention provides a stable synergistic herbicidal composition comprising:

[0118] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;

[0119] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives;

[0120] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives;

[0121] D) Additive selected from Urea clathrate, Organosilicone-based powder adjuvant, tallow amine ethoxylate, ammonium sulphate, and Epoxide soybean oil either alone or in combination thereof; and

[0122] E) One or more agrochemically acceptable excipients.

[0123] In one another embodiment, the present invention provides a stable synergistic herbicidal composition comprising:

[0124] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;

[0125] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemicallyacceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition; and

[0126] C) Compound of Formula III, i.e., 2-(2,2-difhroroethoxy)-N-(5,8- dimethoxy [1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives, in the range of 0.001-90% by weight of the composition.

[0127] In one another embodiment, the present invention provides a stable synergistic herbicidal composition comprising:

[0128] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;

[0129] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;

[0130] C) Compound of Formula III, i.e., 2-(2,2-difhroroethoxy)-N-(5,8- dimethoxy [1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives, in the range of 0.001-90% by weight of the composition; and

[0131] D) One or more agrochemically acceptable excipients.

[0132] In one another embodiment, the present invention provides a stable synergistic herbicidal composition comprising:

[0133] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;

[0134] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemicallyacceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;

[0135] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives, in the range of 0.001-90% by weight of the composition; and

[0136] D) At least one or more additives.

[0137] In one another embodiment, the present invention provides a stable synergistic herbicidal composition comprising:

[0138] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;

[0139] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;

[0140] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives, in the range of 0.001-90% by weight of the composition;

[0141] D) Additive selected from Urea clathrate, Organosilicone-based powder adjuvant, tallow amine ethoxylate, ammonium sulphate, and Epoxide soybean oil either alone or in combination thereof, in the range of 0.001-20% by weight of the composition; and

[0142] E) One or more agrochemically acceptable excipients.

[0143] In one preferred embodiment, the present invention provides a stable synergistic herbicidal composition comprising:A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-65% by weight of the composition;

[0144] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-40% by weight of the composition; and

[0145] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives, in the range of 0.001-40% by weight of the composition.

[0146] In yet another embodiment, the present invention provides a process for preparation of the stable synergistic herbicidal composition comprising:

[0147] A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;

[0148] B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives; and

[0149] C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives.

[0150] In accordance with an embodiment of the present invention, there is provided a synergistic herbicidal composition comprising active ingredients present in the weight % range as given below:Compounds Compound A Compound B Compound C Active ingredients Compound of Formula I, Compound of Formula II, A compound of Formula i.e., 5-tert-butyl-3-(2,4- i.e., methyl 2-[[[[[(4,6- III, i.e., 2 (2, 2- dichloro-5- dimethoxy-2- difluoroethoxy)-N-(5, 8 - isopropoxyphenyl)-!,3,4- pyrimidinyl)amino]carbony dimethoxy[1,2,4]triazolo[1, oxadiazol-2(3H)-one or its 1] amino] sulfonyl]methyl]be 5-c]pyrimidin-2-yl)-6- agrochemically acceptable nzoate or its (trifluoromethyl)benzene- salts, esters and derivatives agrochemically acceptable 1 -sulfonamide or its salts, esters and derivatives agrochemically acceptable salts, esters or its derivatives Weight Percentages % 0.001-90% 0.001-90% 0.001-90% w / w or % w / v

[0151]

[0152] In one embodiment of the present invention, the synergistic herbicidal composition results in an increased yield of the treated plant. In another embodiment of the invention, there is synergistic and efficacious control of various weeds affecting the plants and crops. The present invention 5 includes within its scope, all possible salts, esters and derivatives of the active ingredients of the composition.

[0153] In one of the embodiments, the synergistic herbicidal composition or formulation according to the present invention has a reduced or zero phytotoxicity with respect to important agricultural crops. 10 This results in the present invention effective and possible in the selective control of weeds.

[0154] In an embodiment of the present invention, the stable synergistic herbicidal composition further optionally comprises additives, inert ingredients and / or adjuvants, for providing the following attributes to the composition of present invention:

[0155] 15 a) uptake of active ingredients, and effective storage stability,

[0156] b) high crops specificity, and improved rain-fastness,

[0157] c) enhanced permeability and stability, and enriched biotic factors,

[0158] d) uniform spray-ability,

[0159] e) better flowability, and enhanced spreading or coverage effect,

[0160] 20 f) improved penetration capacity, and safer to the environment.In an embodiment of the present invention, the stable synergistic herbicidal composition further optionally comprises additives and / or adjuvants, for providing the attributes such as enhanced stability, enhanced permeability, enhanced efficacy, improved penetration capacity, uniform spray-ability, improved rain-fastness, enriched biotic factors, better flowability, enhanced applicability, reduced foaming, reduced off-site drifting, enhanced spreading or coverage effect, effective storage stability, longer residual effect, improved uptake of active ingredients, better biostimulating effects, and safer to the environment and other beneficial properties; to the composition of present invention.

[0161] In another embodiment of the present invention, the stable synergistic herbicidal composition of the present invention further comprises one or more agrochemically acceptable excipients including but not limited to the group comprising surfactant(s), dispersing agent(s), co -dispersant, anti-freezing agent(s), emulsifier(s) (anionic and non-ionic), anti-foaming agent / defoamer(s), wetting agent(s), antimicrobial / anti-bacterial agent(s), anti-caking agent, thickening agent / thickener(s), quick coating agent(s) or sticking agents / sticker(s), spreader(s), binder(s), pH-adjusting agent(s), anti-caking agent(s), adjuvant(s), filler(s) / suspension aid(s), colorant(s), carrier(s), buffering agent(s), polymer(s), rheology modifier(s), safener(s), solvent(s), cosolvent(s), biocide or a combination thereof. Additional components may also be included, e.g., protective colloids, carriers, adhesives, thixotropic agents, penetration agents, stabilisers, sequestering agents. More generally, the active materials can be combined with any solid or liquid carrier / additive, which complies with usual formulation techniques.

[0162] An additive used in the present invention is any material that is added to an agrochemical formulation to enhance or modify the performance of the formulation. An additive used in the present invention to make it a safer to ecological environmental, having low toxicity and having no phytotoxicity effects on any part of the plant.

[0163] Examples of surfactant(s) and / or dispersing agent and / or co-dispersant used herein include but not limited to the group comprising polymeric anionic dispersant, polyarylphenyl ether phosphate, tristyryl phenol ethoxylate, Tristyrenated phenol ethoxylate, Polymethyl methacrylatepolyethylene glycol graft copolymer, acrylate copolymer, acrylic copolymer, Ammonium Distyrylphenyl Ether Sulphate, Alkyl polyglucoside, Sodium lauryl sulphonate, Alpha olefinsulphonate, polymeric dispersant, Calcium salt of alkyl benzene sulphonate, Calcium doceylbenzene sulphonate, Non-ionic surfactant, polyalkoxylated butyl ether, acrylic graft copolymer, Sodium methyl oleoyl taurate, non-ionic proprietary surfactant, Methyl naphthalene sulfonic acid, polymer with formaldehyde, sodium salt, ethoxylated tristryl phenol Sulphate, alkyl naphthalene formaldehyde condensate, sodium alkyl naphthalene sulfonate blend, naphthalene sulfonic acid, phenol sulfonic acid-formaldehyde polycondensation as sodium salt, sodium salt condensate with formaldehyde, ethoxylated oleyl cetyl alcohol, Acrylate graft Copolymer, Anionic tristyrylphenol phosphate surfactant, Sodium Alkyl Naphthalene Sulfonate Condensate, polyalkelene glycol ether, Sodium Isopropyl Naphthalene Sulfonate, Dialkyl naphthalene sulphonate sodium salt, Naphthalene Sulphonic Acid, Formaldehyde, Ethoxylated fatty glyceride, Ethoxylated Polyarylphenol Phosphate Ester, Lignosulfonic Acid, Sodium Salt, Sulfomethylated, ethoxylated fatty alcohol, methyl naphthalene sulfonic acid, polymer with formaldehyde sodium salt, Sodium polymethyl methacrylate, Polymethylmethacrylate, sodium polyacrylate, alkyl naphthalene sulfonate formaldehyde condensate or its sodium salt, Sodium Naphthalene Sulfonate formaldehyde condensate, Amine Salt of a Phosphated Tristyryl Phenol Ethoxylate, Tristyrenated phenol ethoxylate, sodium lignosulphonate, calcium lignosulphonate, Sodium Alkyl Naphthalene Sulfonate, alkylphenol polyoxyethylene ether, sodium salt of naphthalene sulfonate condensate, alkyl naphthalene sulfonate condensate blend, polymeric surfactant, sodium salt of alkyl naphthalene sulfonate, sodium salt of methyl naphthalene sulfonate, lignosulphonate, polycarboxylate or its sodium salt, naphthalene sulfonic acid-branched and linear derivative sodium salts, fatty alcohol polyoxyethylene ether, alcohol polyglycol ether, non-aqueous dispersant - non-ionic polymeric surfactant, aqueous dispersant - polymeric amphoteric aqueous dispersant or mixtures thereof and present in the range of 0.01-20% by weight of the composition. Examples of wetting agent used herein include but not limited to the group comprising tristyrylphenol ethoxylate non-ionic emulsifier, mixture of non-ionic surfactants, Blend of Anionic and Non-ionic, Sodium dioctyl sulfosuccinate, alkoxylated alcohol, block copolymer, alcohol polyglycol ether, Polyalkyleneoxide modified polydimethylsiloxane, alkyl olefin sulphates, dioctyl sulpho succinate, alkyl naphthalene sulphate, Di-isopropyl Napthalene sulphonate, Benzenesulfonic acid, Hydroxy polymer with formaldehyde, Phenol and Urea sodium salt, Polyalkoxy ethers, alkyl phenol ethoxylates, tri-styrenated phenol ethoxylate, EO / PO block co-polymers, butyl polyalkylene oxide block copolymer, sodium lauryl sulphate, sodium sulphates or mixtures thereof and present in the range of 0.001-20% by weight of the total composition.

[0164] Examples of defoamer or antifoaming agent used herein include but not limited to the group comprising silicon emulsion based anti-foam agents, Siloxane polyalkyleneoxide, Polydimethylsiloxane, trisiloxane ethoxylates, silicone oil, silicone compound, C10～C20 saturated fat acid compounds or C8～C10 aliphatic alcohols compound, vegetable oil based antifoam, tallow based fatty acids, polyalkyleneoxide polydimethylsiloxane emulsion and mixtures thereof and present in the range of 0.001-5.0 % by weight of the composition.

[0165] Examples of anti-freezing agent used herein include but not limited to the group comprising glycol, propylene glycol, mono ethylene glycol, glycerine, diethylene glycol, sorbitol, urea, mannitol, Aluminum Magnesium Silicate, polyethylene glycol or mixtures thereof and present in the range of 0.01-20% by weight of the composition.

[0166] Examples of filler used herein include but not limited to the group comprising silicon dioxide, China-clay, kaolin, starch, bentonite, precipitated silica, fumed silica, lactose monohydrate, talcum powder, lactose, ammonium sulphate, water, sodium Sulphate, magnesium sulphate, sodium citrate, sodium chloride, potassium chloride and mixtures thereof and present in the range of 0.001-60 % by weight of the composition.

[0167] Examples of anti-caking agent used herein include but not limited to the group comprising of talc, hydrous magnesium silicate, magnesium carbonate, calcium carbonate, precipitate silica, silica powder, hydrophobic fumed silica and mixtures thereof and present in the range of 0.001-10% by weight of the composition.

[0168] Examples of carrier used herein include but not limited to the group comprising of silicon dioxide, china clay, kaolin, starch, bentonite, precipitated silica, silica powder, fumed silica, lactose monohydrate, talcum powder, lactose, ammonium sulpha or mixture thereof and present in the range of 0.1-45 % by weight of the composition.

[0169] Examples of biocide or anti-microbial / anti-bacterial agent(s), agent(s) used herein include but not limited to the group comprising of 1, 2,- Benzisothiazolin -3-one, blends of 1,2-benzisothiazolin-3-one and 2-methyl-4-isothiazolin-3-one, 5-chloro-2-methyl-4-isothiazolin-3-one, blends of 5-chloro-2-methyl-4-isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one, zinc 1 -hydroxy -2(1H)-pyridinethione, blends of zinc l-hydroxy-2(lH)-pyridinethione and zinc oxide, and 2-n-octyl-4-isothiazolin-3-one or mixture thereof and present in the range of 0.001 to 10 % by weight of the composition.

[0170] Examples of the rheology modifier or thickeners or thickening agents or suspending agent(s)used herein include but not limited to the group comprising of xanthan gum, gum arabic, gun ghatti, gum karaya, gum tragacanth, guar gum, or locust bean gum; silica, silicon dioxide, attagel, agar, alginic acid, polysaccharides, carboxymethyl cellulose, bentonite clay, aluminium magnesium silicate, hydroxy propyl cellulose, Sodium methyl cellulose, xanthan gum, gum arabic, Silica powder, gaur gum, carbomer, chitosan, precipitated silica or mixtures thereof and present in the range of 0.001-10.0 % by weight of the composition.

[0171] Examples of safeners used herein include but not limited to the group comprising of AD-67 (MON 4660), benoxacor, benthiocarb, brassinolide, cloquintocet (mexyl), cyometrinil, daimuron, dichlormid, dicyclonon, dimepiperate, disulfoton, fenchlorazole-ethyl, fenclorim, flurazole, fluxofenim, furilazole, harpin proteins, isoxadifen-ethyl, jiecaowan, jiecaoxi, mefenpyr-diethyl, mephenate, naphthalic anhydride (NA), oxabetrinil, R29148 and N -phenyl-sulfonylbenzoic acid amides or mixture thereof and present in the range of 0.001-10.0 % by weight of the composition.

[0172] Examples of emulsifier(s) used herein include but not limited to the group comprising of araliphatic or aliphatic non-ionic oil emulsifier-ethoxylated sorbitol hexaester derived from oleic acid, emulsifier such as ethoxylated mono-, di- and trialkylphenols, ethoxylates of long-chain alcohols and polyethylene oxide / polypropylene oxide homo- and copolymers, Anionic and nonionic blend of castor oil ethoxylate, Hydrophobically Modified Polyacrylate Copolymer, Polymeric emulsifier (Nonionic polyalkylene oxide block copolymer), Ethoxylates of long-chain alkanols, Castor oil ethoxylate, ethoxylated monoalkylphenol, ethoxilates of cetyl alcohol and / or stearyl alcohol; water soluble emulsifier, Emulsifier (Blend of Anionic and Non-ionic), Tristyrylphenol ethoxylate-20 mole, Alkyl diphenyl sulfonates, Ethoxylated Tristyrylphenol,and Anionic emulsifier such as alkali metal and ammonium salts of alkyl sulfates, of hemisulfates of ethoxylated alkanols and ethoxylated alkylphenols, alkylsulfonic acids, bis(phenylsulfonic acid)ethers and their alkali metal or ammonium salts, sodiumlaurylsulfate, sodium (cetyl / stearyl) sulfate or mixture thereof and present in the range of 0.001-20 % by weight of the composition.

[0173] Examples of emulsifier(s) used herein is / are selected from group or non-ionic, ionic, or a blend or combination thereof, present in the range of 0.001-20 % by weight of the composition.

[0174] Examples of Non-ionic emulsifier(s) used herein is / are selected from group comprising of Araliphatic or aliphatic non-ionic oil emulsifier - ethoxylated sorbitol hexa-ester derived from oleic acid, Ethoxylated mono-, di- and trialkylphenols, Ethoxylates of long-chain alcohols, Polyethylene oxide / polypropylene oxide homo- and copolymers, Hydrophobically Modified Polyacrylate Copolymer (nonionic polymeric dispersant), Polymeric emulsifier (Nonionic polyalkylene oxide block copolymer), Ethoxylates of long-chain alkanols, Castor oil ethoxylate, Ethoxylated monoalkylphenol, Ethoxylates of cetyl alcohol and / or stearyl alcohol, Tristyrylphenol ethoxylate, Ethoxylated Tristyrylphenol, Non-ionic water-soluble emulsifiers, or a combination thereof.

[0175] Examples of the ionic emulsifier(s) used herein is / are selected from group comprising of alkali metal and ammonium salts of alkyl sulfates, hemisulfates of ethoxylated alkanols, hemisulfates of ethoxylated alkylphenols, alkylsulfonic acids, bis(phenylsulfonic acid) ethers and their alkali metal or ammonium salts, sodium lauryl sulfate, sodium (cetyl / stearyl) sulfate, Ionic water-soluble emulsifiers or combination thereof.

[0176] Examples of solvent(s) and co-solvent(s) used herein include but not limited to the compounds selected from polar and non-polar solvent from the group comprising heavy aromatic hydrocarbon, diethyl phthalate, N-Methyl-2 -pyrrolidone (NMP), Solvent Naphtha (Solvent C-9), Di methyl sulfoxide (DMSO), Dimethylformamide (DMF), Dialkylene glycol dialkyl ethers, Methyl soyate oil, N- alcohol, 2-ethyl hexanol, alkyl amide, vegetable oil, mineral oil, distilled water, aromatic solvents, water or mixtures thereof and present in the range of 0.01 to 20% by weight of the composition.

[0177] Examples of colouring pigment(s) / dye(s) used herein include but not limited to the red dye FGR03, Permanent Rubin L5-B-01, pigment blue 15:4, pigment blue 15:3, pigment blue 15:2, pigment blue 15:1, pigment blue 80, pigment yellow 1, pigment yellow 13, pigment red 112, pigment red48:2, pigment red 48: 1, pigment red 57: 1, pigment red 53:1, pigment orange 43, pigment orange 34, pigment orange 5, pigment green 36, pigment green 7, pigment white 6, pigment brown 25, basic violet 10, basic violet 49, violet 23, acid red 51, acid red 52, acid red 14, acid blue 9, acid yellow 23, basic red 10, basic red 108 or mixtures thereof and present in the range of 0.001- 10.0 % by weight of the composition.

[0178] Examples of polymer(s) used herein include but not limited to the isocyanate, polyisocyanate used is toluene -2, 4-diisocyanate (TDI), diethylenetriamine (DETA), ethylene diamine (EDA), triethylenetetramine (TETA), and / or hexamethylene diamine (HMDA), diethanolglycine sodium salt, ethanoldiglycine disodium salt, hydroxymonocarboxylic acid compounds, hydroxydicarboxylic acid compounds, tetrasodium N, N-bis(carboxylatomethyl)-L-glutamate (GLDA), methylene diisocyanate (MDI), and / or low molecular weight polydiisocynates or mixtures thereof and present in the range of 0.01- 5.0 % by weight of the composition.

[0179] Examples of binder(s) used herein include but not limited to the group of compounds selected from polyvinylpyrrolidone (PVP), polyvinyl alcohol, methyl cellulose, and carboxymethyl cellulose, sodium starch glycolate, polyisocyanate, polyterpene resin or mixtures thereof and present in the range of 0.01- 40 % by weight of the composition

[0180] Examples of the preservative / s) used herein include but not limited to the group of compounds selected from Methyl paraben (Methyl p-hydroxybenzoate), Propyl paraben (Propyl p-hydroxybenzoate), Methylisothiazolinone (MIT), Chloromethylisothiazolinone (CMIT), Benzisothiazolinone (BIT), DMDM Hydantoin, Imidazolidinyl Urea, Phenol, Cresol, Chlorocresol, Benzoic acid, Sorbic acid, Salicylic acid, Thymol (natural preservative), Sodium benzoate, Potassium sorbate, Bronopol (2-bromo-2-nitropropane-l,3-diol), Propyl para-hydroxy -benzoate or mixture thereof and present in the range of 0.01- 35 % by weight of the composition. Examples of stabilizer(s) used herein include but not limited to the compounds selected from butylated copolymer, Butylated Hydroxy Toluene (BHT), Butylated Hydroxyanisole (BHA), Ascorbic Acid (Vitamin C), Tocopherol (Vitamin E), Benzophenone-3 (a benzotriazole UV absorber), Hindered Amine Light Stabilizers (HALS), Propylene Glycol, Oxanilide derivatives, Ethoxylated Alkylphenols (e.g., nonylphenol ethoxylates), Block copolymers, Polyvinyl alcohol (PVA), Acrylic or Butylated Copolymers, Citric acid / Sodium citrate, Phosphates (e.g., Sodiumor Potassium phosphate), Acetates (e.g., Sodium acetate), EDTA (Ethylenediaminetetraacetic acid), Citric acid (dual role: pH and chelation), NTA (Nitrilotriacetic acid), Xanthan gum, Attapulgite clay, Bentonite, Hydroxypropyl methylcellulose (HPMC) or mixture and present in the range of 0.01- 35 % by weight of the composition.

[0181] Examples of the pH adjusting agent(s) / buff ering agent(s) used herein include but not limited to the compounds selected from Citric Acid, Citric Acid Monohydrate, Citric Acid Dihydrate, Sodium Citrate, Potassium Citrate, Tartaric Acid, Potassium Hydrogen Tartrate, Lactic Acid, Sodium Phosphate (Monobasic or Dibasic), Potassium Phosphate (Monobasic / Dibasic), Sodium Bicarbonate, Sodium Carbonate, Ammonium Acetate / Ammonium Hydroxide, Acetic Acid, Sodium Acetate, Borax (Sodium Borate) or mixture thereof and present in the range of 0.01- 25 % by weight of the composition.

[0182] According to the embodiments of the present invention, the present stable synergistic herbicidal composition can be formulated as one or more of Capsule suspension (CS), Dispersible concentrate (DC), Dustable powder (DP), Powder for dry seed treatment (DS), Emulsifiable concentrate (EC), Emulsifiable granule (EG), Emulsion water-in-oil (EO), Emulsifiable powder (EP), Emulsion for seed treatment (ES), Emulsion oil-in-water (EW), Flowable concentrate for seed treatment (FS), Granules (GR), Micro-emulsion (ME), Oil-dispersion (OD), Oil miscible flowable concentrate (OF), Oil miscible liquid (OL), Oil dispersible powder (OP), Suspension concentrate (SC), Suspension concentrate for direct application (SD), Suspo-emulsion (SE), Water soluble granule (SG), Soluble concentrate (SL), Spreading oil (SO), Water soluble powder (SP), Water soluble tablet (ST), Ultra-low volume (ULV) suspension, Tablet (TB), Ultra-low volume (ULV) liquid, Water dispersible granules (WG), Wettable powder (WP), Water dispersible powder for slurry seed treatment (WS), Water dispersible tablet (WT), a mixed formulation of CS and SC (ZC) or a mixed formulation of CS and SE (ZE) or a mixed formulation of CS and EW (ZW).

[0183] According to the embodiments of the present invention, the invention further provides the process for preparation of the said herbicidal composition, wherein the said composition can be one or more of Capsule suspension (CS), Dispersible concentrate (DC), Dustable powder (DP), Powder for dry seed treatment (DS), Emulsifiable concentrate (EC), Emulsifiable granule (EG), Emulsion water-in-oil (EO), Emulsifiable powder (EP), Emulsion for seed treatment (ES), Emulsion oil-in-water (EW), Flowable concentrate for seed treatment (FS), Granules (GR), Micro-emulsion (ME),Oil-dispersion (OD), Oil miscible flowable concentrate (OF), Oil miscible liquid (OL), Oil dispersible powder (OP), Suspension concentrate (SC), Suspension concentrate for direct application (SD), Suspo-emulsion (SE), Water soluble granule (SG), Soluble concentrate (SL), Spreading oil (SO), Water soluble powder (SP), Water soluble tablet (ST), Ultra-low volume (ULV) suspension, Tablet (TB), Ultra-low volume (ULV) liquid, Water dispersible granules (WG), Wettable powder (WP), Water dispersible powder for slurry seed treatment (WS), Water dispersible tablet (WT), a mixed formulation of CS and SC (ZC) or a mixed formulation of CS and SE (ZE) or a mixed formulation of CS and EW (ZW).

[0184] In further embodiment of the present invention, depending on the formulation type, they comprise one or more liquid or solid carriers, appropriate surfactants (such as dispersants, protective colloids, emulsifiers, wetting agents and tackifiers), and appropriate further excipients which are customary for formulating herbicidal composition. Further excipients include e.g., organic and inorganic thickeners, bactericides, antifreeze agents, antifoams, colorants and, for seed formulations, adhesives.

[0185] In one of the embodiments of the present invention, suitable carriers include liquid and solid carriers. Liquid carriers include e.g. non-aqueous solvents such as cyclic and aromatic hydrocarbons, e.g. paraffins, tetrahydronaphthalene, alkylated naphthalenes and their derivatives, alkylated benzenes and their derivatives, alcohols such as methanol, ethanol, propanol, butanol and cyclohexanol, ketones such as cyclohexanone, strongly polar solvents, e.g. amines such as N-methylpyrrolidone, and water as well as mixtures thereof. Solid carriers include e.g. mineral earths such as silicas, silica gels, silicates, talc, kaolin, limestone, lime, chalk, bole, loess, clay, dolomite, diatomaceous earth, calcium sulfate, magnesium sulfate, magnesium oxide, ground synthetic materials, fertilizers such as ammonium sulfate, ammonium phosphate, ammonium nitrate, ureas, and products of vegetable origin such as cereal meal, tree bark meal, wood meal and nutshell meal, cellulose powders, or other solid carriers.

[0186] In one embodiment, additives such as Siloxane Polyalkyleneoxide Copolymer or Siloxane Polyalkyleneoxide Copolymer super-wetter is an organosilicone based powder adjuvant that can enhance the water absorption efficiency of hard-to-wet soils by increasing their water infiltration, drainage, water retention and hydrophilicity; tallow amine ethoxylate increases thebiocompatibility in environmental applications and help in the interactions of active ingredients; ammonium sulphate help is resistant to leaching and helps the crop to utilize nitrogen efficiently; urea clathrate provides superior wetting and spray retention properties and serves as an excellent nitrogen source for crops and epoxide soybean oil provides increased active ingredient uptake and improved rain fastness to the composition; and epoxide soybean oil provides increased active ingredient uptake and improved rain fastness to the composition. The said additives are stable and hygroscopic resulting in an efficient uptake and functioning.

[0187] In one embodiment of the present invention, Siloxane Polyalkyleneoxide Copolymer has superspreading ability, it significantly lowers the surface tension of spray solutions, allowing them to spread uniformly across plant surfaces, including waxy or hard-to-wet leaves. This enhances the penetration and absorption of herbicides, leading to improved efficacy. Siloxane Polyalkyleneoxide Copolymer is especially effective in low-volume spray applications and helps increase rainfastness and reduce runoff. Its use supports more efficient herbicide delivery, often allowing for reduced application rates.

[0188] In one embodiment of the present invention, the inclusion of both Siloxane Polyalkyleneoxide Copolymer super-wetter and tallow amine ethoxylate in a formulation significantly enhances its surface activity and delivery efficiency. Siloxane Polyalkyleneoxide Copolymer, a trisiloxane-based super-spreader, dramatically reduces surface tension, enabling rapid and uniform spreading of the solution across plant surfaces, even on waxy or water-repellent leaves. In synergy, tallow amine ethoxylate, a non-ionic surfactant, acts as a powerful wetting and penetration agent, improving the absorption of active ingredients into plant tissues. This combination ensures maximum bioavailability and performance of herbicidal actives.

[0189] In one embodiment of the present invention, ammonium sulphate particularly as a water conditioner and adjuvant. It helps improve the efficacy of herbicides, by binding with hard water cations such as calcium and magnesium that would otherwise reduce herbicidal absorption and activity. By preventing these ions from interacting with the active ingredient, ammonium sulphate enhances uptake into plant tissues. It may also act as a nitrogen source, supporting plant growth. In one embodiment of the present invention, Epoxide soybean oil, a bio-based plasticizer and solvent, improves formulation compatibility, reduces phytotoxicity, and enhances the dispersionof active compounds. Derived from renewable sources, both additives support sustainable agriculture by offering low toxicity, biodegradability, and improved formulation efficiency without compromising efficacy.

[0190] In one embodiment of the present invention, Siloxane Polyalkyleneoxide Copolymer, tallow amine ethoxylate, ammonium sulphate, and epoxide soybean oil are additives used individually or in combination to enhance the performance of herbicidal formulations. Siloxane Polyalkyleneoxide Copolymer, a superspreading organosilicone surfactant, reduces surface tension and improves leaf coverage and penetration of active ingredients. Tallow amine ethoxylates, as non-ionic surfactants, aid in emulsification and enhance herbicide uptake. Ammonium sulphate serves as a water conditioner, preventing hard water ions from reducing herbicide efficacy, while also acting as a nitrogen source. Epoxide soybean oil, a biodegradable solvent and plasticizer, improves formulation stability, compatibility, and reduces phytotoxicity. Used alone or synergistically, these additives optimize spray performance, improve bioavailability of actives, and support sustainable and effective crop protection.

[0191] In one embodiment, additives such as urea clathrate, Siloxane Polyalkyleneoxide Copolymer or Siloxane Polyalkyleneoxide Copolymer super-wetter, tallow amine ethoxylate, ammonium sulphate, and epoxide soybean oil either alone or in combination thereof, present in the range of 0.001 - 20% by weight of the composition.

[0192] According to the embodiments of the present invention, the present stable synergistic herbicidal composition can be applied to various crops and plants including but not limited to transplanted rice, transplanted rice pre -emergence (3 DAT), transplanted rice (post-emergence 20 DAT), rice (transplanted), rice (nursery), rice (transplanted rice), Rice (Direct Seeded Rice), turf, sports greens & ornamental grass, plants in non-cropped areas including playgrounds, roadsides, cemeteries, ornamental shrubs, vines, trees, cereals especially wheat, rice, lawns, orchards, olives, chicory, etc.

[0193] According to the embodiments of the present invention, the present herbicidal composition provides synergistic and effective control against weeds including grasses such as Echinochloa crusgalli, Alternanthera sessillis, Ammania bacifera, Broad Leaved Weeds: Caesulia axillaris,Cyperus difformis, Cyperus iria, Echinochloa colonum, Echinochloa Crusagalli, Eclipta alba, Fimbristylis miliacca, Grasses: Echinochloa Colona, Ludwigia parviflora, Ludwigia spp., Leptochloa chinensis, Cynodon dactylon, Cyperus rotundus, Enhydra fluctuans, Caesulia axillaris, Marsilea quadrifoliata, Monochoria spp., Monochoria vaginalis, Scirpus royeli, Sedges: Cyperus difformis, Sphenecelea zeylanica, crabgrass, annual bluegrass, goosegrass, buttonweed, annual sedge, pigweed, chickweed, wild mustard, stinkgrass, barnyardgrass, rice flatsedge, dwarf umbrella grass, nut-grass, creeping water primrose, sedges, broad-leaved weeds including loosestrife, chickweed and clover, aquatic weeds including water plaintain and water hyacinth, certain grasses including barnyardgrass, young watergrass, annual blackgrass and buckwheat, etc.

[0194] In yet another embodiment, the weeds may be controlled by contacting the target weeds or its locus with a bioactive amount of the novel and inventive composition of the present invention.

[0195] According to the embodiments of the present invention, the present stable synergistic herbicidal composition of the present invention can be applied to a plant / crop / soil by spraying, rubbing, atomizing, irrigating, evaporating, dusting, fogging, broadcasting, pouring, mist blowing, soil mixing, foaming, painting, spreading-on, drenching, dipping or drip irrigation, etc.

[0196] In yet another embodiment, the composition of the present invention can also comprise or may be applied together and / or sequentially with further active compounds. These further compounds can be selected from fertilizers or micronutrient donors or microorganisms or other preparations that influence plant growth, such as inoculants (e.g., a strain of nitrogen-fixing bacteria), and plant inducers.

[0197] Through the herbicidal composition of present invention, the number of applications to control wide range of weeds appearing at the same time is minimised. The composition of present invention is highly safe to the user and to the environment. The composition offers the user a single homogenous application eliminating the need for tank mix. The composition also is cost-effective as it provides much greater simultaneous control and can be used in a variety of crops with a broader spectrum of protection.

[0198] Thus, before describing the present invention in detail, it is to be understood that this invention is not limited to particularly exemplified systems or process parameters that may of course, vary. Itis also to be understood that the terminology used herein is for the purpose of describing particular embodiments of the invention only and is not intended to limit the scope of the invention in any manner. The use of examples anywhere in this specification including examples of any terms discussed herein is illustrative only, and in no way limits the scope and meaning of the invention or of any exemplified term. Likewise, the invention is not limited to various embodiments given in this specification. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. In the case of conflict, the present document, including definitions will control. In one embodiment, the composition according to the present invention acts synergistically to control weeds in various crops.

[0199] Representative examples of the present composition of this invention are provided below and are not to be construed as limiting in any manner:

[0200] EXAMPLES: GENERAL RECIPE OF COMPOSITION OF PRESENT INVENTION: Compound of Formula I herein pertains to 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4-oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;

[0201] Compound of Formula II herein pertains to methyl 2-[[[[[(4,6-dimethoxy-2-pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives.

[0202] Compound of Formula III, herein pertains to 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives.

[0203] % (w / w) of S. No. Ingredients the composition 1 Compound of Formula I Technical 0.001-90 2 Compound of Formula II Technical 0.001-90 3 Compound of Formula III Technical 0.001-90

[0204]

[0205] Additive(s)- Siloxane Polyalkyleneoxide Copolymer, tallow amine ethoxylate, ammonium sulphate, and Epoxide soybean oil, silicone 0.01-20 ethoxylated oil, either alone or in combination thereof Surfactant / Dispersing agent(s) / Co-dispersant(s)- polymeric anionic dispersant, polyarylphenyl ether phosphate, tristyryl phenol ethoxylate, Polymethyl methacrylate -polyethylene glycol graft copolymer, Polymethylmethacrylate, acrylate copolymer, acrylic copolymer, Sodium lauryl sulphonate, Alpha olefin sulphonate, polymeric dispersant, Calcium salt of alkyl benzene sulphonate, Calcium alkylbenzene sulphonate, Non-ionic surfactant, polyalkoxylated butyl ether, acrylic graft copolymer, Sodium methyl oleoyl taurate, non-ionic proprietary surfactant, Polymeric anionic dispersing agent, Methyl naphthalene sulfonic acid, polymer with formaldehyde, sodium salt, ethoxylated tristryl phenol Sulphate, alkyl naphthalene formaldehyde condensate, naphthalene sulfonic acid, phenol sulfonic acid- formaldehyde polycondensation as sodium salt, sodium salt condensate with formaldehyde, ethoxylated oleyl cetyl alcohol, Sodium Alkyl 0.01-20 Naphthalene Sulfonate Blend, styrenated phenol ethoxylate, polyalkelene glycol ether, Sodium Isopropyl Naphthalene Sulfonate, Dialkyl naphthalene sulphonate sodium salt, Naphthalene Sulphonic Acid, Formaldehyde, Acrylate graft Copolymer, Graft Comb copolymer, Ethoxylated fatty glyceride, Ethoxylated Polyarylphenol Phosphate Ester, Lignosulfonic Acid, Sodium Salt, Sulfomethylated, ethoxylated fatty alcohol, methyl naphthalene sulfonic acid, polymer with formaldehyde sodium salt, Sodium Alkylnaphthalene Sulfonate Formaldehyde Condensate, Sodium polymethyl methacrylate, sodium polyacrylate, alkyl naphthalene sulfonate formaldehyde condensate or its sodium salt, Sodium Naphthalene Sulfonate formaldehyde condensate, sodium lignosulphonate, calcium lignosulphonate, Sodium Alkyl Naphthalene Sulfonate, Naphthalene Sulphonic Acid, Formaldehyde,

[0206]

[0207] alkylphenol polyoxyethylene ether, sodium salt of naphthalene sulfonate condensate, alkyl naphthalene sulfonate condensate blend, polymeric surfactant, sodium salt of alkyl naphthalene sulfonate, sodium salt of methyl naphthalene sulfonate, polycarboxylate, naphthalene sulfonic acid-branched and linear derivative sodium salts, fatty alcohol polyoxyethylene ether, alcohol polyglycol ether, non-aqueous dispersant

[0208] - non-ionic polymeric surfactant, aqueous dispersant - polymeric amphoteric aqueous dispersant or mixtures thereof

[0209] Wetting agent(s)- tristyrylphenol ethoxylate non-ionic emulsifier, polyalkoxylated butyl ether, mixture of non-ionic surfactants, Blend of Anionic and Non-ionic, alkoxylated alcohol, block copolymer, alcohol polyglycol ether, alkyl olefin sulphates, dioctyl sulpho succinate, alkyl naphthalene sulphate, Di-isopropyl Napthalene sulphonate, Sodium alkyl naphthalene sulfonate formaldehyde condensate, Benzenesulfonic acid, 0.001-20 Hydroxy polymer with formaldehyde, Phenol and Urea sodium salt, Polyalkoxy ethers, alkyl phenol ethoxylates, tri-styrenated phenol ethoxylate, EO / PO block co-polymers, Polymeric emulsifier (Nonionic polyalkylene oxide block copolymer), butyl polyalkylene oxide block copolymer, sodium lauryl sulphate, sodium sulphates or mixtures thereof Defoamer / Anti-foaming agent- silicon emulsion based anti-foam agents, Siloxane polyalkyleneoxide, Polydimethylsiloxane, trisiloxane ethoxylates, silicone oil, silicone compound, C10~C20 saturated fat acid 0.001-5.0 compounds or C8~C10 aliphatic alcohols compound, vegetable oil based antifoam, tallow based fatty acids, polyalkyleneoxide -modified polydimethylsiloxane emulsion and mixtures thereof

[0210] Anti-freezing agent(s)- glycol, propylene glycol, mono ethylene glycol, glycerine, diethylene glycol, sorbitol, urea, mannitol, polyethylene glycol 0.01-20 or mixtures thereof

[0211]

[0212] Filler(s)- silicon dioxide, china-clay, kaolin, starch, bentonite, precipitated silica, fumed silica, lactose monohydrate, talcum powder, lactose, ammonium sulphate, water, sodium Sulphate, magnesium 0.001-60 sulphate, sodium citrate, sodium chloride, potassium chloride and mixtures thereof

[0213] Anti-caking agent(s)- group of talc, hydrous magnesium silicate, magnesium carbonate, calcium carbonate, precipitate silica, silica 0.001-10 powder, hydrophobic fumed silica and mixtures thereof

[0214] Carrier(s)- silicon dioxide, china clay, kaolin, starch, bentonite, precipitated silica, silica powder, fumed silica, ppt silica powder, lactose

[0215] 0.1-45 monohydrate, talcum powder, lactose, ammonium sulpha or mixture thereof

[0216] Biocide / Anti-microbial agent (s)- 1, 2,- Benzisothiazolin -3-one, blends

[0217] of l,2-benzisothiazolin-3-one and 2-methyl-4-isothiazolin-3-one, 5- chloro-2-methyl-4-isothiazolin-3-one, blends of 5-chloro-2-methyl-4- 0.001-10 isothiazolin-3-one and 2-methyl-4-isothiazolin-3-one, zinc 1 -hydroxy - 2(lH)-pyridinethione, blends of zinc l-hydroxy-2(lH)-pyridinethione

[0218] and zinc oxide, and 2-n-octyl-4- isothiazolin-3-one or mixture thereof Rheology modifier / Thickening agent(s)- polysaccharides, carboxymethyl cellulose, bentonite clay, aluminium magnesium silicate,

[0219] 0.001-10.0 hydroxy propyl cellulose, xanthan gum, gum arabic, Silica powder, gaur

[0220] gum, carbomer, chitosan, precipitated silica or mixtures thereof

[0221] Emulsifier(s)- Non-ionic emulsifiers- Araliphatic or aliphatic non-ionic

[0222] oil emulsifier - ethoxylated sorbitol hexaester (derived from oleic acid), Ethoxylated mono-, di- and trialkylphenols, Ethoxylates of long-chain alcohols, Polyethylene oxide / polypropylene oxide homo- and 0.001-20 copolymers, EO / PO block copolymers, Polymeric emulsifier (Nonionic polyalkylene oxide block copolymer), Ethoxylates of long-chain alkanols, Castor oil ethoxylate, Ethoxylated monoalkylphenol,

[0223]

[0224] Ethoxylates of cetyl alcohol and / or stearyl alcohol, Tristyrylphenol ethoxylate, Ethoxylated Tristyrylphenol or a mixture thereof.

[0225] Ionic emulsifiers including but not limited to Alkali metal and ammonium salts of alkyl sulfates, Hemisulfates of ethoxylated alkanols and ethoxylated alkylphenols, Alkylsulfonic acids, Bis(phenylsulfonic acid) ethers and their alkali metal or ammonium salts, Sodium lauryl sulfate, Sodium (cetyl / stearyl) sulfate, or a mixture thereof.

[0226] Or a mixture of ionic or non-ionic.

[0227] Solvent or co-solvent(s) - polar and non-polar solvent from the group comprising heavy aromatic hydrocarbon, N methyl pyrollidone (NMP), Solvent Naphtha (Solvent C-9), Di methyl sulfoxide (DMSO),

[0228] 0.01-20 Dimethylformamide (DMF), Propylene Glycol, N- alcohol, 2-ethyl hexanol, alkyl amide, vegetable oil, mineral oil, distilled water, aromatic solvents, water or mixtures thereof

[0229] Colouring pigment(s) / dye(s)- red dye FGR03, Permanent Rubin L5-B- 01, pigment blue 15:4, pigment blue 15:3, pigment blue 15:2, pigment blue 15:1, pigment blue 80, pigment yellow 1, pigment yellow 13, pigment red 112, pigment red 48:2, pigment red 48: 1, pigment red 57: 1

[0230] , pigment red 53:1, pigment orange 43, pigment orange 34, pigment 0.001-10 orange 5, pigment green 36, pigment green 7, pigment white 6, pigment brown 25, basic violet 10, basic violet 49, violet 23, acid red 51, acid red

[0231] 52, acid red 14, acid blue 9, acid yellow 23, basic red 10, basic red 108 or mixtures thereof

[0232] Polymer(s)- isocyanate, polyisocyanate used is toluene -2, 4-diisocyanate (TDI), diethylenetriamine (DETA), ethylene diamine (EDA), triethylenetetramine (TETA), and / or hexamethylene diamine (HMDA),

[0233] 0.01-5.0 diethanolglycine sodium salt, ethanoldiglycine disodium salt, hydroxymonocarboxylic acid compounds, hydroxydicarboxylic acid compounds, tetrasodium N, N-bis(carboxylatomethyl)-L-glutamate

[0234]

[0235] (GLDA), methylene diisocyanate (MDI), and / or low molecular weight polydiisocynates or mixtures thereof

[0236] Binder(s)- polyvinylpyrrolidone, polyvinyl alcohol, methyl cellulose, and carboxymethyl cellulose, polyisocyanate, polyterpene resin or 0.01-40 % mixtures thereof

[0237] Preservative(s)- Methyl paraben (Methyl p-hydroxybenzoate), Propyl paraben (Propyl p-hydroxybenzoate), Methylisothiazolinone (MIT), Chloromethylisothiazolinone (CMIT), Benzisothiazolinone (BIT), DMDM Hydantoin, Imidazolidinyl Urea, Phenol, Cresol, Chlorocresol, 0.01-35% Benzoic acid, Sorbic acid, Salicylic acid, Thymol (natural preservative), Sodium benzoate, Potassium sorbate, Bronopol (2-bromo-2- nitropropane-l,3-diol), Propyl para-hydroxy -benzoate or mixture thereof Stablizer(s)- butylated copolymer, Butylated Hydroxy Toluene (BHT), Butylated Hydroxyanisole (BHA), Ascorbic Acid (Vitamin C), Tocopherol (Vitamin E), a benzotriazole UV absorber, Hindered Amine Light Stabilizers (HALS), Oxanilide derivatives, Ethoxylated Alkylphenols (e.g., nonylphenol ethoxylates), Block copolymers (e.g., Pluronic types), Polyvinyl alcohol (PVA), Acrylic or Butylated 0.01-35% Copolymers, Citric acid / Sodium citrate, Phosphates (e.g., Sodium or Potassium phosphate), Acetates (e.g., Sodium acetate), EDTA (Ethylenediamine tetraacetic acid), Citric acid (dual role: pH and chelation), NTA (Nitrilotriacetic acid), Xanthan gum, Attapulgite clay, Bentonite, Hydroxypropyl methylcellulose (HPMC) or mixture thereof

[0238] pH adjusting agent(s) / Buffering agent(s) - Citric Acid, Citric Acid Monohydrate, Citric Acid Dihydrate, Sodium Citrate, Potassium Citrate, Tartaric Acid, Potassium Hydrogen Tartrate, Lactic Acid, Sodium 0.01-25% Phosphate (Monobasic or Dibasic), Potassium Phosphate (Monobasic / Dibasic), Sodium Bicarbonate, Sodium Carbonate, Ammonium Acetate

[0239]

[0240] / Ammonium Hydroxide, Acetic Acid, Sodium Acetate, Borax (Sodium Borate) or mixture thereof

[0241] Rheology modifier - (xanthan gum, gum arabic, gun ghatti, gum karaya,

[0242] gum tragacanth, guar gum, or locust bean gum; silica, silicon dioxide,

[0243] attagel, agar, alginic acid, polysaccharides, carboxymethyl cellulose,

[0244] 22 0.001-10.0 % bentonite clay, aluminium magnesium silicate, hydroxy propyl cellulose,

[0245] Sodium methyl cellulose, xanthan gum, gum arabic, Silica powder, gaur

[0246] gum, carbomer, chitosan, precipitated silica or mixture thereof)

[0247] Safener: AD-67 (MON 4660), benoxacor, benthiocarb, brassinolide, cloquintocet (mexyl), cyometrinil, daimuron, dichlormid, dicyclonon, dimepiperate, disulfoton, fenchlorazole-ethyl, fenclorim, flurazole,

[0248] 23 fluxofenim, furilazole, harpin proteins, isoxadifen-ethyl, jiecaowan, 0.001-10% jiecaoxi, mefenpyr-diethyl, mephenate, naphthalic anhydride (NA), oxabetrinil, R29148 and N -phenyl-sulfonylbenzoic acid amides or mixture thereof

[0249] 24 Distilled water / China Clay / DMF QS Total 100

[0250]

[0251] Example A: Compound of Formula 118% + Compound of Formula II 2.2 % + Compound of Formula III 1 % SC

[0252] Sr. Ingredients % w / w or % No. w / v

[0253] 1 Compound of Formula I Technical 18 2 Compound of Formula II Technical 2.2 3 Compound of Formula III Technical 1 4 Isoxadifen-ethyl 3 5 Acrylic Graft Copolymer 5.00

[0254] 6 Polyalkoxy ethers 3.00

[0255]

[0256] 7 Methyl naphthalene sulfonic acid, polymer with

[0257] formaldehyde, sodium salt 4.00

[0258] 8 Propylene Glycol 7.00

[0259] 9 1,2 -Benzisothiazolin-3 -one 0.10

[0260] 10 Polydimethylsiloxane emulsion 1.00 11 Xanthan Gum 0.15 12 D M water QS to make 100%

[0261]

[0262] TOTAL 100.0

[0263] FORMULATION PROCESS

[0264] A. Pre-Mixing

[0265] 1. Into a clean reactor D M Water was charged and stirring was started.

[0266] 2. Added Propylene glycol, Acrylic Graft Copolymer, Polyalkoxy ethers, Methyl naphthalene sulfonic acid, polymer with formaldehyde, sodium salt, Polydimethyl siloxane, 1,2-Benzisothiazolin-3-one and safener. A homogeneous solution was made by mixing well.

[0267] 3. Compound of Formula I technical, Compound of Formula II technical and Compound of Formula III technical were added and mixed well to form a homogeneous slurry.

[0268] B. Wet-Milling process

[0269] 1. The premix was allowed to pass through the bead mill at 400 to 500 Ltr / hr feed rate so as to get a desired particle size.

[0270] 2. The grinded material was collected in post blender.

[0271] C. Post Mixing

[0272] 1. The milled slurry was collected into the post blender and to this pre hydrated xanthum gum was added.

[0273] 2. It was mixed well till the slurry attains right viscosity.

[0274] 3. The formulation was packed into HDPE bottles.

[0275] STABILITY DATA: Compound of Formula 118% + Compound of Formula II 2.2 % + Compound of Formula III 1 % SCSr. NO Test Parameter Specification Observatio Cold Test HST at 54 n at °C 0°C 7 days 14 days 1. Off-white coloured

[0276] suspension free Complies Appearance Complies Complies from any lumps or

[0277] extraneous matter

[0278] 2. Compound of

[0279] Formula I Technical 18 % (+ 5 %, -5%) 18.23 18.21 18.34 (%'W / w)

[0280] 3. Compound of 2.31

[0281] Formula II technical 2.2 % (+10 %, -5%) 2.32 2.38 (% w / w))

[0282] 4. Compound of 1.03

[0283] Formula III 1 % (+10 %, -5%) 1.04 1.09 Technical (% w / w)

[0284] 5. Suspensibility 98.64

[0285] Compound of Min 80% 98.67 98.86 Formula I, %w / w

[0286] 6. Suspensibility Min 80% 98.50

[0287] Compound of 98.56 98.62 Formula II, %w / w

[0288] 7. Suspensibility Min 80% 98.14

[0289] Compound of 98.25 98.74 Formula III, %w / w

[0290] 8. Persistant Foaming,

[0291] Max. 60 8 9 7 mL

[0292] 9. Wet Sieve, material

[0293] passing through 45- Min 98 % 99.5 99.6 99.7 micron sieve

[0294] 10. pH of 1% aqueous

[0295] 7.0 - 10.0 7.55 7.36 7.4 emulsion

[0296] 11. Pourability, Rinse

[0297] Max. 1.5 1.11 1.28 1.10 residue, % by mass

[0298] 12. Density@ 25°C,

[0299] 1.21 1.22

[0300] g / mL 1.150 - 1.250 1.19

[0301]

[0302] EXAMPLE B. Compound of Formula 110 % + Compound of Formula II 5 % + Compound of Formula III 0.1 % EC

[0303] Sr. Ingredients % w / w or %

[0304] No. w / v

[0305] 1 Compound of Formula I Technical 10

[0306] 2 Compound of Formula II Technical 5

[0307] 3 Compound of Formula III Technical 0.1

[0308] 4 Isoxadifen- ethyl 3.2

[0309]

[0310] 5 Emulsifier (Blend of Anionic and Non -ionic) 15.00

[0311] 6 Dimethylformamide (DMF) 10.00

[0312] 7 Solvent - C-9 Q. S.

[0313] TOTAL 100.00

[0314]

[0315] FORMULATION PROCESS

[0316] 1. Into a clean and dry reactor solvent C-9 was charged and started stirring.

[0317] 2. To this mixture Dimethylformamide (DMF) was added and mixed well

[0318] 3. Added technical Compound of Formula I, technical Compound of Formula II and technical Compound of Formula III. Mixed well to dissolve and to get a clear solution.

[0319] 4. Added Emulsifier (Blend of Anionic and Non-ionic), safener and mixed well to form an emulsifiable concentrate.

[0320] 5. Filtered this solution through sparkler filter and collected the filtrate into another clean and dry vessel.

[0321] 6. Packed the formulation in QA approved containers.

[0322] Stability Data- Compound of Formula 110% + Compound of Formula II 5 % + Compound of Formula III 0.1 % EC

[0323] Sr. Test Parameter Specification Observatio Cold Test HST at 45 N n at °C O 0°C 7 days 14 days 1. Yellowish to slightly

[0324] Appearance brown coloured clear Complies Complies Complies liquid

[0325] 2. Active Content

[0326] Compound of 10% (+5 %, -5%) 10.25 10.24 10.32 Formula I

[0327] 3. Active Content

[0328] Compound of 5 % (+10%, -5%) 5.23 5.21 5.29 Formula II

[0329] 4. Active Content

[0330] 0.1 % (+10%, -5%)

[0331] Compound of 0.11 0.11 0.11 Formula III

[0332] 5. Persistant Foaming,

[0333] Max. 60

[0334] mL 6 9 8

[0335]

[0336] 6. pH of 1 % aqueous

[0337] 6.0-8.0 6.88 6.86 6.88 emulsion

[0338] 8. Flash Point, °C

[0339] (Closed cup Abel) Above 24.5 °C 48°C 49 °C 48 °C 9. Emulsion stability Emulsion stability and

[0340] re- emulsification

[0341] 0 h Initial

[0342] emulsification complete

[0343] 0.5 h " Cream",

[0344] maximum: 0.2

[0345] ml

[0346] 2.0 h " Cream",

[0347] maximum:

[0348] 2ml Complies Complies Complies 'Oil’,

[0349] maximum: trace

[0350] 24 h Re- emulsificatio

[0351] n complete

[0352] 24.5 h " Cream",

[0353] maximum: 2

[0354] ml

[0355] " oil", maximum:

[0356]

[0357] trace

[0358] EXAMPLE C: Compound of Formula 140% + Compound of Formula II 0.1 % + Compound of Formula III 5 % WP

[0359] Sr. No. Ingredients % w / w or % w / v 1 Compound of Formula I Technical 40

[0360] 2 Compound of Formula II Technical 0.1

[0361] 3 Compound of Formula III Technical 5

[0362] 4 Isoxadifen-ethyl 3.2

[0363] 5 Sodium Lignosulphonate 10.0

[0364] 6 Sodium alkyl naphthalene sulfonate formaldehyde condensate 5.0

[0365] 7 Sodium lauryl sulphonate / Alpha olefin sulphonate 3.0

[0366] 8 Silica ppt 2.0

[0367] 9 China clay Q. S. to make 100% TOTAL 100.0

[0368]

[0369] MANUFACTURING PROCESS:

[0370] 1. All required technicals, i.e., Compound of Formula I technical, Compound of Formula II technical, Compound of Formula III technical, safener and inert ingredients, were mixed and then grounded in an air jet mill.

[0371] 2. The particle size was checked after grinding to ensure that it was less than 10 microns (D90). 3. The ground powder was post-blended and mixed well.

[0372] STABILITY DATA:

[0373] Compound of Formula 140% + Compound of Formula II 0.1 % + Compound of Formula III 5 % WP

[0374] Sr. Test Parameter Specification Observation at HST at 54 °C No. Room 14 days Temperature

[0375] 1 Appearance White to off white Complies Complies powder free from

[0376] extraneous matter

[0377] 2 Compound of Formula I

[0378] 40 % (+ 5%, -5%) 41.24 Technical (%w / w) 40.99

[0379] 3 Compound of Formula II 0.1 % (+ 10%, -5%)

[0380] 0.11 0.11 technical (% w / w))

[0381] 4 Compound of Formula III

[0382] 5 % (+10%, -5%) 5.34 5.38 Technical (% w / w)

[0383] 5 Suspensibility of Min 80% 98.33 98.56 Compound of Formula I

[0384] (% w / w)

[0385] 6 Suspensibility of Min 80% 98.38 98.81 Compound of Formula II

[0386] (% w / w)

[0387] 7 Suspensibility of Min 80% 98.12 98.23 Compound of Formula III

[0388] (% w / w)

[0389]

[0390] 8 Persistant Foaming, mL Max. 60 after 1 minute 11 14 (1% solution in 342 ppm

[0391] hard water)

[0392] 9 Wet Sieve, material passing Min 98 % 98.82 98.90 through 45 -micron sieve

[0393] 10 pH of 1 % aqueous emulsion 5.0 to 8.0 6.56 6.63

[0394]

[0395] 11 Wettability 120 sec max 60 70

[0396] Example D. Compound of Formula I 0.1 % + Compound of Formula II 10 % + Compound of Formula III 3 % SE

[0397] Sr. No. Ingredients % w / w or % w / v

[0398] 1 Compound of Formula I Technical 20.00 2 Compound of Formula II Technical 10.00 3 Compound of Formula III Technical 12.00 4 Isoxadifen-ethyl 3.5 5 Solvent Naptha 12.00 6 Tristyrenated phenol ethoxylate 2.50 7 Calcium alkylbenzene sulphonate 0.50 8 Polyvinyl alcohol 0.05 9 Polydimethylsiloxane 0.80 10 Propylene Glycol 5.00 11 1,2-Benz-iso-thiozolane 0.10 12 Sodium Lignosulphonate 2.50 13 Sodium salt of lignosulphonic acid 2.50 14 Polymethylmethacrylate 3.06 15 Xanthum Gum 0.30 16 D M Water Q. S. TOTAL 100.00

[0399]

[0400] 1. FORMULATION PROCESS

[0401] A] Compound of Formula I EW phasei. Into a clean and dry reactor (Reactor-01) solvent Naptha was charged and stirring was started.

[0402] ii. Technical Compound of Formula I was added. It was mixed well to dissolve and to get a clear solution.

[0403] iii. In another clean and dry vessel (Reactor-02) D M Water was charged and Tristyrenated phenol ethoxylate, Calcium alkylbenzene sulphonate, polyvinyl alcohol, Polydimethylsiloxane, and Propylene Glycol were added and mixed well to dissolve. iv. Added the material from Reactor-01 to Reactor-02 under high speed mixing.

[0404] v. Analyse the Compound of Formula I EW to be used for further process.

[0405] B] Compound of Formula II and Compound of Formula III Millbase

[0406] i. Into a clean and dry reactor (Reactor -03) D M water was charged and stirring was started. ii. Propylene Glycol, Polydimethylsiloxane, 1,2-Benz-iso-thiozolane, Sodium Lignosulphonate, Sodium salt of lignosulphonic acid, Polymethylmethacrylate and Compound of Formula II and Compound of Formula III technical, were added.

[0407] iii. Mixed well to form a homogeneous slurry.

[0408] iv. Allowed to pass this slurry through bead mill to achieve a desired particle size.

[0409] Compound of Formula I 0.1 % + Compound of Formula II 10 % + Compound of Formula III 3 % SE

[0410] i. Mixed both Compound of Formula I EW phase and Compound of Formula II and Compound of Formula III Mill base.

[0411] ii. To this xanthan gum was added and mixed well.

[0412] iii. Packed the formulation in QA approved containers.

[0413] Stability Data and Specification: Herbicidal composition comprising Compound of Formula I 0.1 % + Compound of Formula II 10 % + Compound of Formula III 3 % SE

[0414] Sr. Test Parameter Specification Observat Cold Test at HST at 54 °C NO ion 0°C 7 days 14 days

[0415] 1. Yellowish to

[0416] slightly brown Complie

[0417] Appearance Complies Complies coloured clear s

[0418]

[0419] liquid2.

[0420] Active Content

[0421] 0.1 % (+10%, - Compound of 0.11 0.11 0.11

[0422] 5%)

[0423] Formula I

[0424] 3. Active Content

[0425] Compound of 10% (+5%, -5%) 10.15 10.13 10.21 Formula II

[0426] 4. Active Content

[0427] 3 % (+10%, -5%)

[0428] Compound of 3.21 3.19 3.24 Formula III

[0429] 5. Suspensibility

[0430] Compound of Min 80% 98.5 98.0 96.5 Formula I

[0431] Suspensibility Min 80%

[0432] Compound of 98.9 99.5 98.6 Formula II

[0433] Suspensibility Min 80%

[0434] Compound of 96.2 97.0 96.7 Formula II

[0435] 6. Persistant

[0436] Foaming, mL Max. 60 10 12 10 7. Wet Sieve,

[0437] material passing

[0438] throu Min 98 % 99.5 99.6 99.7 gh 45 micron

[0439] sieve

[0440] 8. pH of 1% aqueous

[0441] emulsion 7.0 - 10.0 8.85 8.76 8.56 9. Dispersion No

[0442] Stability Creamin No Creaming, No Creaming, No Creaming, No

[0443] @342 PPM Hard g, No No No Sedimentation

[0444] Water Sedimen Sedimentation Sedimentation

[0445]

[0446] tation

[0447] Evaluation of synergistic effect of herbicidal composition of the present invention

[0448] A synergistic effect of two or more products exists whenever the action of an active ingredient composition is greater than the sum of the actions of the individual components. Synergism was calculated by using Colby’s method (Weeds, vol. 15 No. 1 (Jan 1967), pp. 20-2.

[0449] The synergistic action expected for a given composition of two active components can be calculated as follows:

[0450] XY

[0451] E = (X + Y) - - 100The synergistic action expected for a given composition of three active components can be calculated as follows:

[0452] (XY+YZ+XZ) (XYZ)

[0453] E = (X + Y + Z) - - + - 100 10000

[0454] Where:

[0455] E represents expected percentage of herbicidal control for the composition of the two or three actives’ ingredients at defined doses (for example equal to x, y and z, respectively).

[0456] X is the percentage of herbicidal control observed by the compound (Compound of Formula I) at a defined dose (equal to x).

[0457] Y is the percentage of herbicidal control observed by the compound (Compound of Formula II) at a defined dose (equal to y).

[0458] Z is the percentage of herbicidal control observed by the compound (Compound of Formula III) at a defined dose (equal to z).

[0459] When the percentage of herbicidal control observed for the composition is greater than the expected percentage, there is a synergism effect.

[0460] Observed control (%)

[0461] Ratio = - Expected control (%)

[0462] Ratio of O / E > 1, synergism observed

[0463] The present invention is illustrated by way of examples; the examples are meant for illustrative purposes and should not be construed as limiting.

[0464] Experiment for Synergistic activity of stable synergistic herbicidal composition of present invention:

[0465] Example 1- Details of experiment on Rice crop:

[0466] Field experiment for synergistic activity of Compound of Formula I + Compound of Formula II + Compound of Formula III for the control of Grassy Weed, Sedges (GW) & Broad Leaf Weed (BLW) in rice crop was conducted at farmer field in District- Karnal, Haryana.

[0467] To evaluate the synergistic effect, rice (Variety: IR 36) crop was sown in 5 m x 5 m plots maintaining 20 cm x 15 cm (row to row and plant to plant) distance with three replications and inRandomized Block Design (RBD). The treatments were applied as foliar application 2-5 leaves of weeds as early post-emergence by using knapsack sprayer fitted with flat fan nozzle in the form of SC formulation @ 2500 ml. / ha. Each active component was applied at recommended doses in different ternary and binary compositions. Solo components and market samples were also taken for comparison. The treatment details are as under:

[0468] Table 1: Treatment details

[0469] Sr.

[0470] Treatments (SC) Formulation %

[0471] No.

[0472] Compound of Formula I + Compound of Formula II +

[0473] T1 0.1% + 10.0% + 3.0% Compound of Formula III

[0474] Compound of Formula I + Compound of Formula II +

[0475] T2 40.0% + 0.1% + 5.0% Compound of Formula III

[0476] Compound of Formula I + Compound of Formula II +

[0477] T3 18% + 2.2% + 1 % Compound of Formula III

[0478] Compound of Formula I + Compound of Formula II +

[0479] T4 10.0% + 5.0% + 0.1% Compound of Formula III

[0480] T5 Compound of Formula I + Compound of Formula II 0.1% + 10.0%

[0481] T6 Compound of Formula I + Compound of Formula II 40.0% + 0.1%

[0482] T7 Compound of Formula I + Compound of Formula II 18% + 2.2%

[0483] T8 Compound of Formula I + Compound of Formula II 10.0% + 5.0%

[0484] T9 Compound of Formula I + Compound of Formula III 0.1% + 3.0%

[0485] T10 Compound of Formula I + Compound of Formula III 40.0% + 5.0%

[0486] Til Compound of Formula I + Compound of Formula III 18% + 1 %

[0487] T12 Compound of Formula I + Compound of Formula III 10.0% + 0.1%

[0488] T13 Compound of Formula II + Compound of Formula III 10.0% + 3.0%

[0489] T14 Compound of Formula II + Compound of Formula III 0.1% + 5.0%

[0490] T15 Compound of Formula II + Compound of Formula III 2.2% + 1 %

[0491] T16 Compound of Formula II + Compound of Formula III 5.0% + 0.1%

[0492] T17 Compound of Formula I 0.1%

[0493] T18 Compound of Formula I 40.0%

[0494] T19 Compound of Formula I 18%

[0495] T20 Compound of Formula I 10.00%

[0496] T21 Compound of Formula II 10.0%

[0497] T22 Compound of Formula II 0.1%

[0498] T23 Compound of Formula II 2.2%

[0499] T24 Compound of Formula II 5.0%

[0500] T25 Compound of Formula III 3.0%

[0501] T26 Compound of Formula III 5.0%

[0502] T27 Compound of Formula III 1%

[0503] T28 Compound of Formula III 0.1%

[0504]

[0505] T29 Untreated check -The treatments T1 to T28 were used as foliar application whereas no treatment was done for T29 control treatment only water was sprayed. The unwanted weeds recorded in the field were infested with Grassy Weeds (GW) i.e., Echinochloa colonum (Awn less barnyard grass), Echinochloa crus galli (Barnyard grass), Fimbrystylis miliacea (Hoorah grass); Sedges i.e. Cyperus difformis (Motha / Dila), Cyperus iria (Motha) and Broad leaf Weeds (BLW) viz. Alternanthera sessilis (Gudrisag), Ammania baccifera (Aginbuti ), Ludwigia spp. (Water Purslane), Marsilea quadrifoliate ( Chaupatiya), Monochorea vaginalis(Panpatta) Sphenoclea zeylenica ( Goose weed) etc. On the observation of field Echinochloa spp. (Barnyard grass) and Ludwigia spp. (Water Purslane ) were found to be most dominating and uniformly distributed in the experimental field. So, Echinochloa spp. and Ludwigia spp. were selected as representative weeds of Grassy Weed (GW) and Broad leaf Weed (BLW) respectively for evaluation of synergistic effect, bio-efficacy and phytotoxic effect of ternary composition, binary composition and solo products.

[0506] Early post-emergence treatment of unwanted weed plant population was observed from 0.25 m2area replicated thrice per plot at 30 days after application for weed control efficacy. Observations for Echinochloa spp. (GW) and Ludwigia spp. (BLW) were recorded at 30 days after application by observing m2area each replication per plot and based on number of weeds and Percent weed control efficacy (WCE) over control was calculated. Based on the Percent weed control efficacy in GW and BLW population the Expected control was calculated and compared with Observed control. The results of the trial have been presented here under in Table 2.

[0507] Table 2: Synergistic effect of stable synergistic herbicidal composition of the present invention against Echinochloa spp. (GW) and Ludwigia spp. (BLW) in Transplanted Rice crop.

[0508] Expected Colby Ratio Observed per

[0509] per cent (Observed % cent Weed

[0510] Weed WC / Sr. control

[0511] Treatments (SC) Formulation control Expected % No. efficiency

[0512] efficiency WC) BL BL GW BLW GW GW W W

[0513] Compound of Formula

[0514] 0.1% + 10.0% 74.7 90.4

[0515] T1 I + Compound of 80.97 94.96 1.08 1.05

[0516]

[0517] Formula II + + 3.0% 7 4Compound of Formula

[0518] III

[0519] Compound of Formula

[0520] I + Compound of

[0521] 40.0% + 0.1% 77.5 88.6

[0522] T2 Formula II + 85.15 93.02 1.10 1.05

[0523] + 5 7 4 Compound of Formula.0%

[0524] III

[0525] Compound of Formula

[0526] I + Compound of

[0527] 91.4

[0528] Form 18% + 2.2% + 76.9

[0529] T3 ula II + 88.35 98.73 1.15 1.08

[0530] 1 % 6 2 Compound of Formula

[0531] III

[0532] Compound of Formula

[0533] I + Compound of

[0534] 10.0% + 5.0% 55.7 87.6

[0535] T4 Formula II + 59.60 92.27 1.07

[0536] + 0 1 4 2 1.05. %

[0537] Compound of Formula

[0538] III

[0539] Compound of Formula 27.7 71.6

[0540] T5 I + Compound of 0.1% + 10.0% 26.44 55.33 0.95 0.77

[0541] 7 1

[0542] Formula II

[0543] Compound of Formula 34.8 64.9

[0544] T6 I + Compound of 40.0% + 0.1% 32.16 50.07 0.92 0.77 r 8 4

[0545] Fo mula II

[0546] Compound of Formula 35.5 76.0

[0547] T7 I + Compound of 18% + 2.2% 32.96 60.56 0.93 0.80

[0548] 3 8

[0549] Formula II

[0550] Compound of Formula 35.3 79.4

[0551] T8 I + Compound of 10.0% + 5.0% 34.06 64.08 0.96 0.81 r 3 4

[0552] Fo mula II

[0553] Compound of Formula

[0554] 70.7 76.3

[0555] T9 I + Compound of 0.1% + 3.0% 60.07 65.33 0.85 0.86

[0556] 4 2

[0557] Formula III

[0558] Compound of Formula

[0559] 75.3 83.4

[0560] T10 I + Compound of 40.0% + 5.0% 70.63 77.97 0.94 0.93

[0561] 7 7

[0562] Formula III

[0563] Compound of Formula

[0564] 74.0 80.4

[0565] T11 I + Compound of 18% + 1 % 69.54 75.67 0.94 0.94

[0566] 3 9

[0567] Formula III

[0568] Compound of Formula

[0569] 49.3 70.4

[0570] T12 I + Compound of 10.0% + 0.1% 46.09 56.08 0.93 0.80

[0571] 7 1

[0572] Formula III

[0573] Compound of Formula 69.8 86.4

[0574] T13 II + Compound of 10.0% + 3.0% 63.76 82.67 0.91 0.96

[0575] 8 1

[0576]

[0577] Formula IIICompound of Formula 68.6 77.7 T14 II + Compound of 0.1% + 5.0% 65.19 71.82 0.95 0.92

[0578] 2 4

[0579] Formula III

[0580] Compound of Formula 68.2 84.2

[0581] T15 II + Compound of 2.2% + 1 % 65.55 81.08 0.96 0.96 Formula III 9 3 Compound of Formula 40.1 74.8

[0582] T16 II + Compound of 5.0% + 0.1% 37.75 70.17 0.94 0.94

[0583] 6 1

[0584] Formula III

[0585] Compound of Formula

[0586] T17 0.1% 16.24 29.67 - - - - I

[0587] Compound of Formula

[0588] T18 40.0% 28.51 48.97 - - - - I

[0589] Compound of Formula

[0590] T19 18% 27.34 45.60 - - - - I

[0591] Compound of Formula

[0592] T20 10.00% 26.03 50.86 - - - - I

[0593] Compound of Formula

[0594] T21 10.0% 13.77 59.64 - - - - II

[0595] Compound of Formula

[0596] T22 0.1% 8.91 31.29 - - - - II

[0597] Compound of Formula

[0598] T23 2.2% 11.27 56.03 - - - - II

[0599] Compound of Formula

[0600] T24 5.0% 12.57 58.17 - - - - II

[0601] Compound of Formula

[0602] T25 3.0% 65.07 66.33 - - - - III

[0603] Compound of Formula

[0604] T26 5.0% 65.55 67.60 - - - - III

[0605] Compound of Formula

[0606] T27 1% 64.26 64.14 - - - - III

[0607] Compound of Formula

[0608] T28 0.1% 31.56 39.78 - - - - III

[0609] T29 Untreated check - - - - - - -

[0610]

[0611] It is clearly evident from the data shown in above Table 2 for per cent control GW and BLW in rice crop that the ternary composition of the present invention comprising Compound of Formula I + Compound of Formula II + Compound of Formula III T1 to T4 are synergistic for both type of weeds control with > 1 Colby’s Ratio. The binary composition of herbicides (Compound of Formula II + Compound of Formula III) T13 to T16 and (Compound of Formula I + Compound of Formula III) T9 to T12 are effective after ternary composition for the control of both type of weeds, but fail to represent any synergistic effect, whereas binary composition with (Compound of Formula I + Compound of Formula II) T5 to T8 are least effective against Grassy Weed (GW) and Broad Leaf Weed (BLW) in comparison to ternary composition for both type of weeds control, and fail to represent any synergistic effect, respectively. All binary compositions and solo product are shown less effective control of in both type of weeds control in compared to ternary compositions.

[0612] Example 2: Bio-efficacy evaluation of the stable synergistic herbicidal composition (Compound of Formula 118% + Compound of Formula II 2.2% + Compound of Formula III 1% SC) of the present invention on Rice crop.

[0613] For the ternary and binary herbicidal composition based on Compound of Formula I 18% + Compound of Formula II 2.2% + Compound of Formula III 1% SC evaluation under field conditions, the basic test composition Compound of Formula I 18% + Compound of Formula II 2.2% + Compound of Formula III 1% SC were used for trial. For ternary herbicidal composition, Compound of Formula I 18% + Compound of Formula II 2.2% + Compound of Formula III 1% SC was used and for binary herbicidal composition, Compound of Formula I 18% + Compound of Formula II 2.2% SC, Compound of Formula I 18% + Compound of Formula III 1% SC and Compound of Formula II 2.2% + Compound of Formula III 1% SC were used. The solo formulations of Compound of Formula I 18% SC, Compound of Formula II 2.2% SC and Compound of Formula III 1% SC were also used for comparison. The formulation of Compound of Formula I 25% EC, Compound of Formula II 60% DF and Compound of Formula III 2.67% OD available in the market were used for comparison.

[0614] The stable synergistic herbicidal composition of the present invention comprising Compound of Formula I 18% + Compound of Formula II 2.2% + Compound of Formula III 1% SC for the controlof Grassy Weed (GW) & Broad Leaf Weed (BLW) in transplanted rice variety (Variety: IR 36) was sown in 5 m x 5 m plots maintaining 20 cm x 10 cm (row to row and plant to plant) distance with three replications and in Randomized Block Design (RBD). The treatments were applied as foliar application 2 - 5 leaves of weeds by using knapsack sprayer fitted with flat fan nozzle in the form of SC formulation @ 2500 ml / ha. Each active component was applied at recommended doses in different ternary and binary compositions. Solo components and market samples were also taken for comparison.

[0615] The observations were recorded for the following objectives.

[0616] Objectives:

[0617] 1. Bio-efficacy evaluation against Grassy Weed (GW) in transplanted rice crop

[0618] 2. Bio-efficacy evaluation against Broad Leaf Weed (BLW) in transplanted rice crop 3. Bio-efficacy evaluation based on per cent weed control efficacy over control of GW. 4. Bio-efficacy evaluation based on percent weed control efficacy of BLW.

[0619] 5. Bio-efficacy evaluation based on crop yield and percent increase over control.

[0620] 6. Phytotoxicity evaluation on transplanted rice crop

[0621] Treatment details:

[0622] Sr. Treatments A. I. (g / ha) Formulation No. (ml or g / ha)

[0623] Compound of Formula I 18% + Compound of

[0624] T1 337.5 + 41.25 1875 Formula II 2.2% + Compound of Formula III 1% SC + 18.75

[0625] Compound of Formula I 18% + Compound of

[0626] T2 450 + 55.00 + 2500 Formula II 2.2% + Compound of Formula III 1% SC 25.00

[0627] Compound of Formula I 18% + Compound of

[0628] T3 562.50 + 68.75 3125 Formula II 2.2% + Compound of Formula III 1% SC + 31.25

[0629] Compound of Formula I 18% + Compound of

[0630] T4 337.5 + 41.25 1875 Formula II 2.2%SC

[0631] Compound of Formula I 18% + Compound of

[0632] T5 450 + 55.00 2500 Formula II 2.2%SC

[0633] Compound of Formula I 18% + Compound of

[0634] T6 562.50 + 68.75 3125 Formula II 2.2%SC

[0635]

[0636] Compound of Formula I 18% + Compound of

[0637] T7 337.5 +18.75 1875 Formula III 1% SC

[0638] Compound of Formula I 18% + Compound of

[0639] T8 450 + 25.00 2500 Formula III 1% SC

[0640] Compound of Formula I 18% + Compound of

[0641] T9 562.50 + 31.25 3125 Formula III 1% SC

[0642] Compound of Formula II 2.2% + Compound of

[0643] T10 41.25 + 18.75 1875 Formula III 1% SC

[0644] Compound of Formula II 2.2% + Compound of

[0645] T11 55.00 + 25.00 2500 Formula III 1% SC

[0646] Compound of Formula II 2.2% + Compound of

[0647] T12 68.75 + 31.25 3125 Formula III 1% SC

[0648] T13 Compound of Formula I 18% SC 450 2500 T14 Compound of Formula II 2.2% SC 55.00 2500 T15 Compound of Formula III 1% SC 25.00 2500 T16 Compound of Formula I 25% EC 500 2000 T17 Compound of Formula II 60% DF 60 100

[0649] T18 Compound of Formula III 2.67% OD 25 1000 T19 Untreated check — — Compound of Formula I 18% + Compound of 900 + 110 +

[0650] T20 Formula II 2.2% + Compound of Formula III 1% SC 5000

[0651] (For phyto- toxicity only) 50.00

[0652]

[0653] Methodology:

[0654] The treatments T1 to T18 and T20 were used as 2-5 leaves stage of weeds whereas no treatment was done for T19 untreated control plots. The treatments were applied as foliar application at the time of 2 - 5 leaves stage of weeds. Each active component was applied at recommended dose in different ternary and binary compositions. Solo components were also taken for comparison. The unwanted weeds recorded in the field were infested with Grassy Weeds (GW) i.e., Echinochloa colonum (Awn less barnyard grass), Echinochloa crusgalli (Barnyard grass), Fimbrystylis miliacea (Hoorah grass); Sedges i.e. Cyperus difformis (Motha / Dila), Cyperus iria (Motha) and Broad leaf Weeds (BLW) viz. Altemanthera sessilis ( Gudrisag), Ammania baccifera (Aginbuti ), Ludwigia spp. (Water Purslane), Marsilea quadrifoliate (Chaupatiya), Monochoreavaginalis(Panpatta) Sphenoclea zeylenica (Goose weed) etc. On the observation of field Echinochloa spp. (Barnyard grass) and Ludwigia spp. (Water Purslane) were found to be most dominating and uniformly distributed in the experimental field. So, Echinochloa spp. and Ludwigia spp. were selected as representative weeds of Grassy Weed (GW) and Broad leaf Weed (BLW) respectively for evaluation of synergistic effect, bio-efficacy and phytotoxic effect of ternary composition, binary composition and solo products.

[0655] Observations for GW & BLW were recorded at before, 30 days after application by observing m2area in each replication per plot and based on number of weeds and per cent weed control over control was calculated. The rice grain yield was recorded after harvest crop. The observations for phytotoxicity to rice crop at 1, 2, 5, 7, 10 and 15 days after application were also recorded. The data were subjected to statistically analysis of variance. Results are presented in Table 2A, 2B, 2C and 2D.

[0656] Results:

[0657] Table 2A: Field bio-efficacy evaluation of Compound of Formula I 18% + Compound of Formula II 2.2% + Compound of Formula III 1% SC against Echinochloa spp. (GW) in Transplanted Rice crop.

[0658] Sr. Treatments (SC) A. I. (g / ha) Form Number of Weed No. ulatio weeds m2 area control n (ml efficiency or (WCE) g / ha) Before 30 30 DAA DAA

[0659] Compound of Formula 1 18% + 337.5 +

[0660] 12.33 4.53

[0661] T1 Compound of Formula II 2.2% + 41.25 + 1875 81.33 (3.58) (2.24) Compound of Formula III 1% SC 18.75

[0662] Compound of Formula 1 18% +

[0663] 450 + 55.00 10.38 2.83

[0664] T2 Compound of Formula II 2.2% + 2500 88.33 + 25.00 (3.3) (1.82) Compound of Formula III 1% SC

[0665] Compound of Formula 1 18% + 562.50 +

[0666] 10.58 2.41

[0667] T3 Compound of Formula II 2.2% + 68.75 + 3125 90.07 (3.33) (1.71) Compound of Formula III 1% SC 31.25

[0668] Compound of Formula 1 18% + 337.5 +

[0669] T4 1875 11.71 10.98 54.74

[0670]

[0671] Compound of Formula II 2.2%SC 41.25 (3.49) (3.39)Compound of Formula 1 18% +

[0672] T5 450 + 55.00 2500 12.62 9.98 58.86 Compound of Formula II 2.2%SC (3.62) (3.24) Compound of Formula 1 18% + 562.50 +

[0673] T6 3125 12.48 9.82 59.52 Compound of Formula II 2.2%SC 68.75 (3.60) (3.21) Compound of Formula 1 18% + 11.84 6.67

[0674] T7

[0675] Compound of Formula III 1% SC 337.5 +18.75 1875 72.51 (3.51) (2.68) Compound of Formula 1 18% + 11.1 6.12

[0676] T8 450 + 25.00 2500 74.77 Compound of Formula III 1% SC (3.41) (2.57) Compound of Formula 1 18% + 562.50 + 10.92 5.67

[0677] T9 Compound of Formula III 1% SC 3125 76.63

[0678] 31.25 (3.38) (2.48) Compound of Formula II 2.2% + 41.25 +

[0679] T10 1875 11.30 7.63 68.55 Compound of Formula III 1% SC 18.75 (3.44) (2.85) Compound of Formula II 2.2% + 55.00 +

[0680] T11 2500 12.33 6.97 71.27 Compound of Formula III 1% SC 25.00 (3.58) (2.73) Compound of Formula II 2.2% + 68.75 +

[0681] T12 3125 11.43 6.75 72.18 Compound of Formula III 1% SC 31.25 (3.45) (2.69) T13 Compound of Formula I 18% SC 450 2500 11.28 17.62 27.37 (3.43) (4.26) Compound of Formula II 2.2%

[0682] T14 55.00 2500 13.11 21.54 11.21 SC (3.69) (4.69)

[0683] 11.33 8.67

[0684] T15 Compound of Formula III 1% SC 25.00 2500 64.26 (3.44) (3.03)

[0685] 12.10 16.71

[0686] T16 Compound of Formula I 25% EC 500 2000 31.12 (3.55) (4.15)

[0687] 11.37 20.92

[0688] T17 Compound of Formula II 60% DF 60 100 13.77 (3.45) (4.63) Compound of Formula III 2.67%

[0689] T18 25 1000 11.17 8.50 64.96 OD (3.42) (3.00) T19 Untreated check 11.76 24.26 - (3.5) (4.98)

[0690] CD (p=0.05) NS 0.31

[0691]

[0692] DAA - Days after application

[0693] Table 2B: Field bio-efficacy evaluation of Compound of Formula I 18% + Compound of Formula II 2.2% + Compound of Formula III 1% SC against Ludwigia spp. (BLW) in Transplanted Rice crop. Sr. Treatments (SC) A. I. (g / ha) Formulat Number of Weed No. ion (ml weeds m2 area control or g / ha) efficiency (WCE) Before 30 30 DAA

[0694]

[0695] DAACompound of Formula I 18%

[0696] + Compound of Formula II 337.5 + 41.25 8.58 2.87

[0697] T1 1875 84.33 2.2% + Compound of + 18.75 (3.01) (1.84) Formula III 1% SC

[0698] Compound of Formula I 18%

[0699] + Compound of Formula II 450 + 55.00 + 1.07

[0700] T2 8.70

[0701] 2500 94.16 2.2% + Compound of 25.00 (3.03) (1-25) Formula III 1% SC

[0702] Compound of Formula I 18%

[0703] + Compound of Formula II 562.50 + 68.75 9.96 0.67

[0704] T3 3125 96.34 2.2% + Compound of + 31.25 (3.23) (1.08) Formula III 1% SC

[0705] Compound of Formula I 18%

[0706] 4.67

[0707] T4 + Compound of Formula II 9.08

[0708] 337.5 + 41.25 1875 74.51

[0709] (3-1) (2.27) 2.2%SC

[0710] Compound of Formula I 18%

[0711] 8.87 4.01

[0712] T5 + Compound of Formula II 450 + 55.00 2500 78.11

[0713] (3.06) (2-12) 2.2%SC

[0714] Compound of Formula I 18%

[0715] 9.68 3.67

[0716] T6 + Compound of Formula II 562.50 + 68.75 3125 79.97

[0717] (3-19) (2.04) 2.2%SC

[0718] Compound of Formula I 18%

[0719] 9.09 5.21

[0720] T7 + Compound of Formula III 337.5 +18.75 1875 71.56

[0721] (3.10) (2.39)

[0722] 1% SC

[0723] Compound of Formula I 18%

[0724] 9.35 4.81

[0725] T8 + Compound of Formula III 450 + 25.00 2500 73.74

[0726] (3-14) (2.30)

[0727] 1% SC

[0728] Compound of Formula I 18%

[0729] 9.12 4.70

[0730] T9 + Compound of Formula III 562.50 + 31.25 3125 74.34

[0731] (3.10) (2.28)

[0732] 1% SC

[0733] Compound of Formula II

[0734] 9.30 5.01

[0735] T10 2.2% + Compound of 41.25 + 18.75 1875 72.65

[0736] (3.13) (2.35) Formula III 1% SC

[0737] Compound of Formula II

[0738] T11 2.2% + Compound of 55.00 + 25.00 2500 9.63 4.47 75.60 Formula III 1% SC (3.18) (2.23) Compound of Formula II

[0739] T12 2.2% + Compound of 68.75 + 31.25 3125 9.42 4.14 77.40 Formula III 1% SC (3.15) (2.15) Compound of Formula I 18%

[0740] T13 450 2500 8.36 9.97 45.58 SC (2.98) (3.24) Compound of Formula II

[0741] T14 55.00 2500 9.53 6.68 63.54 2.2% SC (3.17) (2.68)

[0742]

[0743] Compound of Formula III

[0744] T15 25.00 2500 9.35 8.11 55.73 1% SC (3.14) (2.93) Compound of Formula I 25%

[0745] T16 500 2000 8.62 9.03 50.71 EC (3.02) (3.09) Compound of Formula II

[0746] T17 60 100 9.37 6.28 65.72 60% DF (3.14) (2.60) Compound of Formula III

[0747] T18 25 1000 8.97 7.57 58.68 2.67% OD (3.08) (2.84)

[0748] T19 Untreated check 9.69 18.32 —

[0749] (3-19) (4.34)

[0750] CD (p=0.05) NS 0.26

[0751]

[0752] DAA - Days after application

[0753] Table 2C: Field bio-efficacy evaluation of Compound of Formula I 18% + Compound of Formula II 2.2% + Compound of Formula III 1% SC based on yield of Transplanted Rice crop.

[0754] Rice % Formula tio

[0755] Sr. grain Increase Treatments (SC) A. I. (g / ha) n (ml or

[0756] No. yield against g / ha)

[0757] (kg / ha) control Compound of Formula 1 18% + 337.5 +

[0758] T1 Compound of Formula II 2.2% + 41.25 + 1875 4223 29.26 Compound of Formula III 1% SC 18.75

[0759] Compound of Formula 1 18% +

[0760] T2 Compound of Formula II 2.2% + 450 + 55.00 2500 4432 35.66

[0761] + 25.00

[0762] Compound of Formula III 1% SC

[0763] Compound of Formula 1 18% + 562.50 +

[0764] T3 Compound of Formula II 2.2% + 68.75 + 3125 4474 36.95 Compound of Formula III 1% SC 31.25

[0765] T4 Compound of Formula I 18% + 337.5 + 1875 3783 15.79 Compound of Formula II 2.2%SC 41.25

[0766] T5 Compound of Formula 1 18% +

[0767] Compound of Formula II 2.2%SC 450 + 55.00 2500 3950 20.90 T6 Compound of Formula 1 18% + 562.50 + 3125 3981 21.85 Compound of Formula II 2.2%SC 68.75

[0768] Compound of Formula 1 18% +

[0769] T7 337.5 +18.75 1875 3789 15.98 Compound of Formula III 1% SC

[0770]

[0771] Compound of Formula 1 18% +

[0772] T8 450 + 25.00 2500 4001 22.47 Compound of Formula III 1% SC

[0773] Compound of Formula 1 18% +

[0774] T9 562.50 + 3125 4108 25.74 Compound of Formula III 1% SC 31.25

[0775] Compound of Formula II 2.2% + 41.25 +

[0776] T10 Compound of Formula III 1% SC 1875 3989 22.10

[0777] 18.75

[0778] Compound of Formula II 2.2% + 55.00 +

[0779] Til 25.74 Compound of Formula III 1% SC 2500 4108

[0780] 25.00

[0781] Compound of Formula II 2.2% + 68.75 +

[0782] T12

[0783] Compound of Formula III 1% SC 3125 4113 25.90

[0784] 31.25

[0785] T13 Compound of Formula I 18% SC 450 2500 3627 11.02 T14 Compound of Formula II 2.2% SC 55.00 2500 3707 13.47 T15 Compound of Formula III 1% SC 25.00 2500 3765 15.24 T16 Compound of Formula I 25% EC 500 2000 3781 15.73 T17 Compound of Formula II 60% DF 60 100 3803 16.41 Compound of Formula III 2.67%

[0786] T18 25 1000 3790 16.00 OD

[0787] T19 Untreated check 3267

[0788] CD (p=0.05) 138

[0789]

[0790] Table 2D: Phytotoxicity evaluation of Compound of Formula I 18% + Compound of Formula II 2.2% + Compound of Formula III 1% SC on Transplanted Rice crop.

[0791] Phytotc »xicity Form pa rameters observed* ulatio

[0792] Sr. (me:an data i •ecorded at Treatments (SC) A. I. (g / ha) n (ml

[0793] No. 1, 2, 3,5,7, 10 and 15 or da; rs after a pplication) g / ha)

[0794] L W N V E H

[0795] Compound of Formula I 18% + 337.5 +

[0796] T1 Compound of Formula II 2.2% + 41.25 + 1875 0 0 0 0 0 0 Compound of Formula III 1% SC 18.75

[0797] Compound of Formula I 18% +

[0798] 450 + 55.00

[0799] T2 Compound of Formula II 2.2% + 2500 0 0 0 0 0 0

[0800] + 25.00

[0801] Compound of Formula III 1% SC

[0802] Compound of Formula I 18% + 562.50 +

[0803] T3 Compound of Formula II 2.2% + 68.75 + 3125 0 0 0 0 0 0 Compound of Formula III 1% SC 31.25

[0804] Compound of Formula I 18% + 337.5 +

[0805] T4

[0806] Compound of Formula II 2.2%SC 1875 0 0 0 0 0 0

[0807] 41.25

[0808] Compound of Formula I 18% +

[0809] T5 450 + 55.00 2500 0 0 0 0 0 0

[0810]

[0811] Compound of Formula II 2.2%SCCompound of Formula I 18% + 562.50 +

[0812] T6 3125 0 0 0 0 0 0 Compound of Formula II 2.2%SC 68.75

[0813] Compound of Formula I 18% +

[0814] T7

[0815] Compound of Formula III 1% SC 337.5 +18.75 1875 0 0 0 0 0 0 Compound of Formula I 18% +

[0816] T8 Compound of Formula III 1% SC 450 + 25.00 2500 0 0 0 0 0 0 Compound of Formula I 18% + 562.50 +

[0817] T9 Compound of Formula III 1% SC 3125 0 0 0 0 0 0

[0818] 31.25

[0819] Compound of Formula II 2.2% + 41.25 +

[0820] T10 Compound of Formula III 1% SC 1875 0 0 0 0 0 0

[0821] 18.75

[0822] Compound of Formula II 2.2% + 55.00 +

[0823] Til

[0824] Compound of Formula III 1% SC 2500 0 0 0 0 0 0

[0825] 25.00

[0826] Compound of Formula II 2.2% +

[0827] T12 68.75 +

[0828] Compound of Formula III 1% SC 3125 0 0 0 0 0 0

[0829] 31.25

[0830] T13 Compound of Formula I 18% SC 450 2500 0 0 0 0 0 0 T14 Compound of Formula II 2.2% SC 55.00 2500 0 0 0 0 0 0 T15 Compound of Formula III 1% SC 25.00 2500 0 0 0 0 0 0 T16 Compound of Formula I 25% EC 500 2000 0 0 0 0 0 0 T17 Compound of Formula II 60% DF 60 100 0 0 0 0 0 0 T18 Compound of Formula III 2.67% OD 25 1000 0 0 0 0 0 0 T19 Untreated check — — 0 0 0 0 0 0 Compound of Formula I 18% +

[0831] Compound of Formula II 2.2% + 900 + 110 +

[0832] T20 5000 0 0 0 0 0 0 Compound of Formula III 1% SC 50.00

[0833] (For phyto- toxicity only)

[0834] L - Leaf injury on tips / surface, W - Wilting, N - Necrosis, V - Vein clearing, E - Epinasty, H - Hyponasty

[0835] *Based on 0-10 scale where: 0=0%, 1=1-10%, 2=11-20%, 3=21-30%, 4=31-40%, 5=41-50%, 6=51-

[0836]

[0837] 60%, 7=61-70%, 8=71-80%, 9=81-90%, 10=91-100%

[0838] From the examples, it is clearly seen that the stable synergistic herbicidal composition of the present invention is superior for controlling the GW at 30 days after application (Table 2A) and for controlling BLW at 30 days after application (Table 2B) in rice crop as compared to the binary composition and solo component comprising at recommended dosage levels. The yield of rice crop also improved in the ternary stable synergistic herbicidal composition comprising Compound of Formula I + Compound of Formula II + Compound of Formula III SC as compared to binary and solo combinations (Table 2C). One of the reasons of higher rice grain yield may be due to better control of both type of weeds.

[0839] Further, the stable synergistic herbicidal composition comprising Compound of Formula I + Compound of Formula II + Compound of Formula III SC @ 1875 ml, 2500 ml, 3125 ml and 5000ml / ha further showed no phytotoxicity in the rice crop even after 1, 2, 3, 5, 7, 10 and 15 days after application (Table 2D).

[0840] In particular, it has now been found, surprisingly that, for example, the herbicidal activity of the stable synergistic herbicidal composition of present invention, compared with the herbicidal activity of individual components, is synergistic. In fact, various advantageous properties associated with the compositions according to the invention, include but are not limited to: knock down effect on weeds at all developmental stages of weeds, preventing discoloration of leaves of plants and crops, enhanced tenderness to plants and crops, preventing ageing of plants and crops and other advantages familiar to a person skilled in the art.

[0841] From the above investigations, it will be observed that numerous modifications and variations can be effectuated without departing from the true spirit and scope of the novel concepts of the present invention. It is to be understood that no limitations with respect to the specific embodiments illustrated is intended or should be inferred. It should be understood that all such modifications and improvements have been deleted herein for the sake of conciseness and readability but are properly within the scope of the following claims.

Claims

I / WE CLAIM:

1. A stable synergistic herbicidal composition comprising:A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives;C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives.

2. The stable synergistic herbicidal composition as claimed in claim 1, comprising:A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition; andC) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives, in the range of 0.001-90% by weight of the composition.

3. A stable synergistic herbicidal composition comprising:A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives, in the range of 0.001-90% by weight of the composition; andD) At least one or more additives.The stable synergistic herbicidal composition as claimed in claim 3, comprising:A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives, in the range of 0.001-90% by weight of the composition;C) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives, in the range of 0.001-90% by weight of the composition;D) Additive selected from Urea clathrate, Organosilicone-based powder adjuvant, tallow amine ethoxylate, ammonium sulphate, and Epoxide soybean oil either alone or in combination thereof, in the range of 0.001-20% by weight of the composition.

5. The stable synergistic herbicidal composition as claimed in claims 1-4, which further comprises one or more agrochemically acceptable excipients.

6. The stable synergistic herbicidal composition as claimed in any of claims 1 to 5, further comprises one or more agrochemically acceptable excipients selected from the group comprising of surfactant(s), dispersing agent(s), co-dispersant, anti-freezing agent(s), emulsifier(s), anti-foaming agent / defoamer(s), wetting agent(s), antimicrobial / anti-bacterial agent(s), thickening agent / thickener(s), quick coating agent(s) or sticking agents / sticker(s), spreader(s), binder(s), pH- adjusting agent(s), anti-caking agent(s), adjuvant(s), filler(s) / suspension aid(s), colorant(s), carrier(s), buffering agent(s), rheology modifier(s), safener(s), solvent(s), co-solvent(s), protective colloid(s), carrier(s), adhesive(s), thixotropic agent(s), penetration agent(s), stabilizer(s), sequestering agent(s), solid or liquid carrier / additive or a combination thereof.7 The stable synergistic herbicidal composition as claimed in any one of claims 1 to 6, wherein application of the composition provides synergistic and effective control against wide range of weeds including weeds such as crabgrass, annual bluegrass, goosegrass, buttonweed, annual sedge, pigweed, chickweed, wild mustard, stink grass, barnyard grass, rice flat sedge, dwarf umbrella grass, nut-grass, creeping water primrose, sedges, broad-leaved weeds including loosestrife, chickweed and clover, aquatic weeds including water plaintain and water hyacinth, certain grasses including barnyard grass, young watergrass, annual blackgrass and buckwheat, Echinochloa crusgalli, Alternanthera sessillis, Ammania bacifera, Broad Leaved Weeds: Caesulia axillaris, Cyperus difformis, Cyperus iria, Echinochloa colonum, Echinochloa crusagalli, Eclipta alba, Fimbristylis miliacca, Grasses: Echinochloa Colonum, Ludwigia parviflora, Ludwigia spp., Leptochloa chinensis, Cynodon dactylon, Cyperus rotundus, Enhydra fluctuans, Marsilea quadrifoliata, Caesulia axillaris, Monochoria spp., Monochoria vaginalis, Scirpus royeli, Sedges: Cyperus difformis, Sphenecelea zeylanica, etc8 The stable synergistic herbicidal composition as claimed in any one of claims 1 to 6, wherein application of the composition can be applied to various crops and plants such as transplanted rice, transplanted rice pre-emergence (3 DAT), transplanted rice (post-emergence 20 DAT), rice (transplanted), rice (nursery), rice (transplanted rice), Rice (Direct Seeded Rice), turf, sports greens& ornamental grass, plants in non-cropped areas including playgrounds, roadsides, cemeteries, ornamental shrubs, vines, trees, cereals especially wheat, rice, lawns weeds, orchards, olives, chicory, etc.

9. The stable synergistic herbicidal composition as claimed in claims 1-6, wherein the formulation is in form of Capsule suspension (CS), Dispersible concentrate (DC), Dustable powder (DP), Powder for dry seed treatment (DS), Emulsifiable concentrate (EC), Emulsifiable granule (EG), Emulsion water-in-oil (EO), Emulsifiable powder (EP), Emulsion for seed treatment (ES), Emulsion oil-in- water (EW), Flowable concentrate for seed treatment (FS), Granules (GR), Micro-emulsion (ME), Oil-dispersion (OD), Oil miscible flowable concentrate (OF), Oil miscible liquid (OL), Oil dispersible powder (OP), Suspension concentrate (SC), Suspension concentrate for direct application (SD), Suspo-emulsion (SE), Soluble concentrate (SL), Spreading oil (SO), Water soluble powder (SP), Water soluble tablet (ST), Ultra-low volume (ULV) suspension, Tablet (TB), Ultra-low volume (ULV) liquid, Wettable powder (WP), Water dispersible powder for slurry seed treatment (WS), Water dispersible tablet (WT), a mixed formulation of CS and SC (ZC) or a mixed formulation of CS and SE (ZE) or a mixed formulation of CS and EW (ZW).

10. A process for preparation of the stable synergistic herbicidal composition comprising:A) Compound of Formula I, i.e., 5-tert-butyl-3-(2,4-dichloro-5-isopropoxyphenyl)- 1,3,4- oxadiazol-2(3H)-one or its agrochemically acceptable salts, esters and derivatives;B) Compound of Formula II, i.e., methyl 2-[[[[[(4,6-dimethoxy-2- pyrimidinyl)amino]carbonyl]amino]sulfonyl]methyl]benzoate or its agrochemically acceptable salts, esters and derivatives; andC) Compound of Formula III, i.e., 2-(2,2-difluoroethoxy)-N-(5,8-dimethoxy[1,2,4]triazolo[1,5-c]pyrimidin-2-yl)-6-(trifluoromethyl)benzene-1-sulfonamide or its agrochemically acceptable salts, esters or its derivatives.

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