A herbicidal composition

Abstract

This invention relates to a herbicidal composition comprising an active component (A) propyzoxystrobin and an active component (B) one or more of the following: oxadiazon, propyzoxystrobin, pendimethalin, triazolyl chlorpyrifos, cypermethrin, quizalofop-p-ethyl, bensulfuron-methyl, tetrazolyl chlorpyrifos, bispyribac-sodium, dicyclosulfuron, and pyrimisulfuron-methyl, wherein the weight ratio of the active component (A) to the active component (B) is 100:1 to 1:100. This invention also relates to the use of the herbicidal composition in controlling the germination or growth of weeds in beneficial plants selected from wheat, barley, rye, triticale, oats, corn, rice, soybean, peanut, rapeseed, radix rubra, potato, sugar beet, sugarcane, cotton, flax, sorghum, forage grass, and lawn; particularly suitable for controlling the germination or growth of weeds in rice crops.

Description

[0001] This application is a divisional application of the patent application filed by the applicant on December 4, 2019, with patent number "202210015128X" and patent title "A Herbicide Composition". Technical Field

[0002] This invention relates to a weed control composition, belonging to the field of crop protection; the weed control composition of this invention is particularly suitable for controlling weeds in soybean, corn, peanut, cotton, sugarcane, potato and rice fields. Background Technology

[0003] Long-term use of herbicides leads to changes in herbicide sensitivity to weeds. Improving herbicide control against tolerant or resistant weeds by increasing application rates is often unsatisfactory. Increasing application rates may reduce herbicide selectivity, or even at higher application rates, the weeding effect may not improve.

[0004] Therefore, in weed control, herbicides need to have better overall selectivity for weeds; achieve the same or better control effect with less application; reduce the release of active compounds into the environment to avoid effects such as leaching and residue; and combine rapid and long-acting effects to avoid multiple applications.

[0005] Flumioxazin is described in EP170191C, and its structural formula is shown in Formula I. Flumioxazin is not satisfactory in all aspects regarding its herbicidal properties.

[0006] Summary of the Invention

[0007] The purpose of this invention is to provide a herbicidal composition that addresses the above-mentioned shortcomings and solves at least one problem such as improving biological properties, providing synergistic properties, reducing dosage rate, broadening the herbicidal spectrum, combining rapid and long-acting effects, and managing resistance to delay resistance.

[0008] The present invention provides a herbicidal composition comprising an active component (A) propyne flumetsulam and an active component (B) one or more of the following: oxadiazon, propyne oxadiazon, cyclopentoxadiazon, triazolyl acetochlor, cypermethrin, quizalofop-p-ethyl, benzyl thiamethoxam, tetrazolyl acetochlor, bispyribac-sodium, dicyclosulfuron, and pyrimisulfuron-methyl, wherein the weight ratio of the active component (A) to the active component (B) is 100:1 to 1:100.

[0009] The active component (B) is selected from oxadiazon; the weight ratio of propyzoxystrobin and oxadiazon is 50:1-1:50; preferably 25:1-1:25; more preferably 10:1-1:10; even more preferably 5:1-1:5.

[0010] The active component (B) is selected from propyne oxadiazon; the weight ratio of propyne flumetsulam and propyne oxadiazon is 10:1-1:50; preferably 5:1-1:50; more preferably 5:1-1:30; more preferably 5:1-1:25; even more preferably 5:1-1:15.

[0011] The active component (B) is selected from cyclopentoxane; the weight ratio of propyzoxystrobin and cyclopentoxane is 10:1-1:50; preferably 5:1-1:50; more preferably 5:1-1:50; even more preferably 5:1-1:25.

[0012] The active component (B) is selected from triazole chlorpyrifos; the weight ratio of propyzoxystrobin and triazole chlorpyrifos is 5:1-1:50; preferably 5:1-1:25; more preferably 5:1-1:10.

[0013] The active component (B) is selected from cypermethrin; the weight ratio of propyzamide and cypermethrin is 1:1-1:100; preferably 1:5-1:50; more preferably 1:5-1:30; even more preferably 1:5-1:20.

[0014] The active component (B) is selected from quizalofop-P-ethyl; the weight ratio of propyzamide and quizalofop-P-ethyl is 1:1-1:100; preferably 1:5-1:100; more preferably 1:10-1:80; more preferably 1:10-1:60; more preferably 1:10-1:50.

[0015] The active component (B) is selected from benzyl sulfadiazine; the weight ratio of propyzoxystrobin and benzyl sulfadiazine is 1:1-1:100; preferably 1:5-1:100; more preferably 1:10-1:80; more preferably 1:10-1:50, and even more preferably 1:10-1:35.

[0016] The active component (B) is selected from tetrazolium oxychloride; the weight ratio of propyzoxystrobin and tetrazolium oxychloride is 1:1-1:50; preferably 1:5-1:40; more preferably 1:5-1:30; even more preferably 1:5-1:25.

[0017] The active component (B) is selected from bispyribac; the weight ratio of propyzoxystrobin and bispyribac is 1:1-1:100; preferably 1:1-1:50; more preferably 1:1-1:30.

[0018] The active component (B) is selected from bicyclosulfuron; the weight ratio of propyzoxystrobin and bicyclosulfuron is 1:1-1:80; preferably 1:5-1:50; more preferably 1:5-1:30; even more preferably 1:5-1:20.

[0019] The active component (B) is selected from pyrazosulfuron; the weight ratio of propyzoxystrobin and pyrazosulfuron is 20:1-1:20; preferably 10:1-1:10; more preferably 5:1-1:10; even more preferably 5:1-1:5.

[0020] The present invention has unexpectedly discovered that propyzoxystrobin, in combination with oxadiazon, propyzoxystrobin, cyclopentoxadiazon, triazolyl oxychloride, cypermethrin, quizalofop-P-ethyl, benzyl oxychloride, tetrazolyl oxychloride, bispyribac-sodium, dicyclosulfuron, and pyrimisulfuron-methyl, works in a particularly advantageous manner.

[0021] Compared to the possible control rates of individual compounds, simultaneous application of active components (A) and (B) or sequential application of active components (A) and (B) resulted in enhanced weed control. This unexpected effect was a true synergistic effect, rather than simply an additive effect of the activities.

[0022] Therefore, the herbicidal composition of the present invention significantly reduces the application concentration of each individual compound. Furthermore, it provides a longer-lasting control effect on weeds.

[0023] First, in the herbicidal composition of the present invention, the application rate of a single compound is reduced while maintaining a good level of action; second, when a single compound becomes ineffective from an agricultural economic point of view at a low application rate range, the herbicidal composition of the present invention achieves a high level of control over weeds.

[0024] The herbicidal compositions of the present invention significantly broaden the spectrum of weed control. The combinations of the present invention not only maintain excellent weed control in useful plants but also allow for greater flexibility in subsequent cropping.

[0025] The herbicidal composition of the present invention exhibits effective weed control against both dryland and paddy field weeds. Therefore, the herbicidal composition can be used for weed control in beneficial plants such as wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugarcane, potatoes, rice crops, or plantations such as citrus orchards and vineyards.

[0026] Therefore, the present invention provides the use of the herbicidal composition in controlling the germination or growth of weeds in useful plants; said useful plants are selected from wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugarcane, potatoes, rice crops, citrus, and grapes.

[0027] The useful plants particularly preferred by this invention are corn, soybean, peanut, sugarcane, cotton, and rice; rice is even more particularly preferred.

[0028] The herbicidal composition of this invention can be used to control a large number of weeds that are important to agricultural economics, such as:

[0029] Grasses and weeds, such as those in the genera *Alopecurus*, *Poa*, *Apera*, *Avena*, *Lolium*, *Bromus*, *Echinochloa*, *Leptochloa*, *Digitaria*, *Setaria*, *Brachiaria*, and *Ischeamum*.

[0030] Broadleaf weeds, such as those in the genera *Gallium*, *Lamium*, *Geranium*, *Solanum*, *Veronica*, *Viola* (e.g., *Viola tricolor*), *Alchemilla*, *Kochia*, *Stellaria*, *Polygonum*, *Matricaria*, *Chenopodium*, *Amaranthus*, *Galinsoga*, *Monochoria*, *Lindernia*, *Anthemis*, and *Sinapis*. The species include *Raphanus* spp., *Papaver* spp., *Capsella* spp., *Rotala* spp., *Butomus* spp., *Limnocharis* spp., *Sphenoclea* spp., *Commelina* spp., *Ludwigia* spp., *Bidens pilosa*, and *Elatine* spp.; the combination also controls annual and perennial sedges, such as *Scirpus* spp. (e.g., *Scirpus juncoides*), *Sagittaria* spp., *Cyperus* spp., and *Fimbristylis* spp.

[0031] The herbicidal composition of the present invention is particularly suitable for controlling weeds in fields with useful vegetation, for example:

[0032] -Wheat crops-, examples of weeds include species of *Alopecurus*, *Poa*, *Apera*, *Avena*, *Lolium*, *Bromus*, *Fumaria*, *Myosotis*, *Gallium*, *Geranium* (e.g., *Geranium rotundifolium*), *Veronica*, *Viola* (e.g., *Viola tricolor*), *Lamium*, *Stellaria*, *Polygonum*, and *Aethusa*. cynapum, Alchemilla spp., Kochia spp., Matricaria spp., Anthemis spp., Papaver spp., Myosotis spp., Capsella spp., Chenopodium spp. and;

[0033] -Rice crop- Examples of weeds include *Echinochloa* spp., *Leptochloa* spp., *Digitaria* spp., *Setaria* spp., *Brachiaria* spp., *Ischeamum* spp., *Monochoria* spp., *Lindernia* spp., *Ludwigia* spp., *Elatine* spp., *Scirpus* spp. (e.g., *Scirpus juncoides*), *Cyperus* spp., *Butomus* spp., *Rotala* spp., *Commelina* spp., and *Limnocharis*. spp.), Sphenoclea spp., Sagittaria spp., Bidens pilosa, and Fimbristylis spp.;

[0034] -Corn- Examples of weeds include *Echinochloa* spp., *Digitaria* spp., *Setaria* spp., *Cyperus* spp., *Kochia* spp., *Matricaria* spp., *Chenopodium* ppp., *Solanum* spp., *Polygonum* spp., *Amaranthus* spp., and; and -Sugarcane- Examples of weeds include *Echinochloa* spp., *Digitaria* spp., *Setaria* spp., *Brachiaria* spp., *Kochia* spp., and *Amarathus* spp.

[0035] In particular, the herbicidal composition of the present invention is especially suitable for controlling the germination or growth of unwanted weeds in paddy fields:

[0036] Barnyard grass (Echinochloa crusgalli), amaranth (Ammannia arenaria HBK), sedge (Cyperus difformis L.), sedge (Scirpus planiculmis Schmidt), creeping clover (Lindernia procumbens Philcox), three-angled grass (Cyperus rotundus L.), water plantain (Alismataceae), arrowhead (Sagittaria trifolia), sesbania exaltata, bamboo flower (Commelinadiffusa), duckweed (Monochoria vaginalis), jointed grass (Equisetum ramosissimum Desf), dayflower (Herba Commelinae), water bamboo leaf (Mllrdannia triguetra), wild water chestnut (Heleocharis plantagineiformis Tang et Wang), sedum miliacea (Fimbristylis miliacea(L.)) Vahl, Cyperus iria L., Scirpus juncoides Roxburgh, Leptochloachinensis, Eclipta prostrata (L.) L.

[0037] The use of the herbicidal composition of the present invention is not limited to controlling the aforementioned weeds, but can also be used to control other weeds.

[0038] The present invention also provides a method for controlling the germination or growth of weeds, comprising: (i) before the weeds germinate; (ii) after the weeds germinate; or (iii) at (i) and (ii), applying an effective amount of a herbicidal composition containing active components (A) and (B) to the weeds or their growth site.

[0039] The present invention also provides a method for controlling weed germination or growth, comprising contacting the weed or its growth site with a herbicidal effective amount of the herbicidal composition. The herbicidal effective amount refers to the amount of the herbicidal active ingredient applied to control weeds.

[0040] The present invention also provides a method for controlling the germination or growth of weeds, wherein the herbicidal composition of the present invention is applied to the soil to control the germination or growth of weeds.

[0041] A method for controlling the germination or growth of weeds, comprising applying the herbicidal composition of the present invention to weeds to control the germination or growth of weeds.

[0042] A method for controlling unwanted germination or growth, comprising applying, together or separately, active components (A) and (B) of the herbicidal composition of the present invention to weeds or their growing areas to control their germination or growth.

[0043] A method for controlling weeds, comprising applying, together or separately, the active components (A) and (B) of the herbicidal composition of the present invention to the soil before weed germination or to the leaves after weed germination to control weed germination or growth.

[0044] The term "weeds" refers to those plants that affect the growth and quality of useful crops. This includes grass weeds and broadleaf weeds.

[0045] If the herbicidal composition of the present invention is applied to the soil surface before the weeds germinate, the germination of weed seedlings is completely prevented, or the weeds grow to the cotyledon stage, but then they stop growing and eventually die completely after two to four weeks.

[0046] If the herbicidal composition is applied to the green parts of the weeds after they have sprouted, growth will also stop sharply within a fairly short time after treatment, and the weed plants will remain in their growth period at the time of application, or they will die completely after a certain period of time, thus eliminating competition from weeds that are harmful to the useful plants earlier and more continuously.

[0047] Although the active components (A) and (B) have shown good or even sufficient selectivity in a wide range of crops, phytotoxicity may occur in some crops, particularly when mixed with other less selective herbicides. Therefore, compositions comprising the herbicidal composition according to the invention and one or more safeners are particularly advantageous. The safener is used in an effective amount to reduce the phytotoxic side effects of the herbicide, for example, in economically important crops or in orchards (plantation crops). Examples include weed control in wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugarcane, potatoes, rice crops, or in plantations such as citrus orchards and vineyards.

[0048] The herbicidal composition described in this invention can be applied in a conventional manner using techniques well known to those skilled in the art. Application methods include, but are not limited to, application to weeds or their growing areas, such as application to areas adjacent to the plants, and application before, after, or on the leaves (dispersing, directional, strip, spot, mechanical, top-feeding, or regeneration), as well as by hand, backpack, machinery, tractor, or aerial (airplane, helicopter, drone) application methods.

[0049] A method for controlling weeds includes adding the herbicidal composition of the present invention to irrigation water and applying it to the weeds or their growing areas using a ground or air duster, sprayer, or pelletizer.

[0050] The application method depends on the intended purpose in a well-known manner; in any case, the technique should ensure the optimal possible distribution of the active components in the herbicidal composition described in this invention.

[0051] Application rates can vary widely and depend on soil properties, application method (pre-emergence or post-emergence, etc.), crop species, weeds to be controlled, prevailing climatic conditions, and other factors controlled by the application method, application time, and target crop. The active ingredient in the herbicidal composition of this invention is typically applied at a rate of 1-2000 g / ha, preferably 10-100 g / ha.

[0052] The herbicidal composition of the present invention can be formulated into conventional formulations. These formulations can be emulsifiable concentrates, aqueous suspensions, oil suspensions, seed-treated dry powders, seed-treated suspensions, water-dispersible granules, wettable powders, suspension emulsions, atomizing agents, coated granules, extruded granules, water-in-oil emulsions, microcapsule suspensions, microcapsule-suspension mixtures, dry suspensions, ultra-low volume liquids, electrostatic oils, gels, granules, and microparticles.

[0053] The formulations described in this invention can be prepared by mixing active components (A) and (B) with liquid and / or solid diluents, and, if necessary, surfactants such as emulsifiers and / or dispersants and / or foaming agents.

[0054] Suitable liquid diluents include water or organic solvents, such as toluene, xylene, cyclohexane, mineral oil, vegetable oil, butanol, ethylene glycol, methyl ethyl ketone, methyl isobutyl ketone, dimethylformamide, dimethyl sulfoxide, and water.

[0055] Suitable solid diluents include diatomaceous earth, magnesium aluminum silicate, activated clay, kaolin, clay, gypsum, bentonite, silica, light calcium carbonate, limestone, sawdust, corn starch, and soluble starch.

[0056] Suitable emulsifiers may be anionic and / or non-ionic emulsifiers, such as alkylphenol polyoxyethylene ethers, alkylphenol polyoxyethylene polyoxypropylene ethers, benzylphenol polyoxyethylene ethers, polyoxyethylene fatty acid esters, polyoxyethylene fatty alcohol ethers, polyoxyethylene fatty amines, alkylphenol polyethylene glycol ethers, etc.

[0057] Suitable dispersants can be alkyl naphthalene sulfonates, bis(alkyl)naphthalene sulfonate formaldehyde condensates, naphthalene sulfonic acid formaldehyde condensates, alkylphenol polyoxyethylene phosphates, alkylphenol polyoxyethylene ether formaldehyde condensate sulfates, alkylphenol polyoxyethylene ether phosphates, alkylphenol polyoxyethylene ethers, castor oil ethylene oxide adducts, ethylene oxide-propylene oxide block copolymers, alkylphenol polyoxyethylene ether formaldehyde condensates, octylphenol polyoxyethylene ether sulfates, and methylcellulose. Examples include sodium lignosulfonate, calcium lignosulfonate, sodium methylnaphthalene sulfonate formaldehyde condensates, sodium naphthalene sulfonate formaldehyde condensates, and sodium methylene naphthalene sulfonate.

[0058] Preferred formulations of this invention may be wettable powders, emulsifiable concentrates, suspensions, oil suspensions, microcapsules, microemulsions, water emulsions, suspension emulsions, water-dispersible granules, microcapsule suspensions-suspensions, and ultra-low volume liquids.

[0059] For water-dispersible granules, those skilled in the art are well aware of the use of appropriate additives to complete this invention. The dispersant is selected from polycarboxylate salts, lignin sulfonates, alkyl naphthalene sulfonates, alkylphenol polyoxyethylene ethers, and ethylene oxide / propylene oxide block polyethers; the wetting agent is selected from alkyl sulfates, alkyl sulfonates, naphthalene sulfonates, sodium lignin sulfonate, fatty alcohol polyoxyethylene ethers, and alkylphenol polyoxyethylene ethers; the disintegrant is selected from ammonium sulfate, sodium sulfate, sodium chloride, ammonium chloride, urea, sucrose, glucose, carboxymethyl cellulose, soluble starch, and polyvinylpyrrolidone; the binder is selected from polyvinyl alcohol, soluble starch, dextrin, xanthan gum, and carboxymethyl (ethyl) cellulose; and the filler is selected from diatomaceous earth, kaolin, silica, light calcium carbonate, talc, attapulgite, and clay.

[0060] For wettable powders, the following additives may be used: dispersants are selected from polycarboxylate, lignin sulfonate, and alkyl naphthalene sulfonate; wetting agents are selected from alkyl sulfate, alkyl sulfonate, and naphthalene sulfonate; and fillers are selected from ammonium sulfate, urea, sucrose, glucose, diatomaceous earth, kaolin, silica, light calcium carbonate, talc, attapulgite, and clay.

[0061] For suspending agents, the following additives can be used: dispersants are selected from polycarboxylates, lignin sulfonates, and alkyl naphthalene sulfonates; emulsifiers are selected from alkylphenol formaldehyde resin polyoxyethylene ether, sorbitan monostearate, dehydrated sorbitan monostearate polyoxyethylene ether, and phenethylphenol polyoxyethylene polyoxypropylene ether; wetting agents are selected from alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonates, and naphthalene sulfonates; thickeners are selected from xanthan gum, polyvinyl alcohol, bentonite, and magnesium aluminum silicate; preservatives are selected from formaldehyde, benzoic acid, and sodium benzoate; defoamers are organosilicon defoamers; and antifreeze agents are selected from ethylene glycol, propylene glycol, glycerin, urea, and inorganic salts (such as sodium chloride).

[0062] For dispersible oil suspensions, the following additives can be used: Dispersants are selected from polycarboxylates, lignin sulfonates, alkyl naphthalene sulfonates, castor oil polyoxyethylene ether, alkylphenol formaldehyde resin polyoxyethylene ether, sorbitan monostearate, dehydrated sorbitan monostearate polyoxyethylene ether, and phenethylphenol polyoxyethylene polyoxypropylene ether; wetting agents are selected from alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonates, and naphthalene sulfonates; thickeners are selected from silica, polyvinyl alcohol, bentonite, and magnesium aluminum silicate; antifreeze agents are selected from ethylene glycol, propylene glycol, glycerin, urea, and inorganic salts (such as sodium chloride); stabilizers are selected from epoxidized soybean oil, epichlorohydrin, and triphenyl phosphate; and dispersion media are selected from soybean oil, rapeseed oil, corn oil, methyl oleate, diesel oil, engine oil, and mineral oil.

[0063] The formulation of the present invention contains active components (A) and (B), wherein the total weight of the active components (A) and (B) accounts for 1%-90% by weight of the herbicidal composition, preferably 5%-80%, more preferably 5%-70%, and even more preferably 10%-60%.

[0064] If appropriate, the herbicidal compositions of the present invention may also contain other additives, such as protective colloids, binders, adhesives, thickeners, antifreeze agents, defoamers, thixotropic agents, penetrants, stabilizers, masking agents, multivalent chelating agents, and complexing agents. Typically, the active ingredient can be combined with any solid or liquid additive conventionally used for formulation purposes.

[0065] Suitable thickeners are polysaccharides (such as xanthan gum and carboxymethyl cellulose), inorganic clays (organically modified or unmodified), polycarboxylates, and silicates.

[0066] Suitable antifreeze agents include ethylene glycol, propylene glycol, urea, and glycerin.

[0067] Suitable defoamers are polysiloxanes, long-chain alcohols, and fatty acid salts.

[0068] Suitable adhesives include polyvinylpyrrolidone, polyvinyl acetate, polyvinyl alcohol, polyacrylate, and cellulose ether.

[0069] Based on the characteristics of the formulation, the application method can be selected according to the intended target and the prevailing environment, such as foliar application, soaking, spraying, dusting, or scattering.

[0070] When applying, the formulation can be in commercial form and, if necessary, diluted in a conventional manner, such as with water to dilute wettable powders, emulsifiable concentrates, dispersants, and water-dispersible granules. For powders, soil application granules, broadcast granules, and spray solutions, they are generally not diluted with other inert substances before use.

[0071] The herbicidal composition of the present invention may also contain various active compounds of other components, such as fungicides, insecticides, acaricides, nematicides, bird repellents, soil structure modifiers, and plant growth regulators.

[0072] The synergistic effect of this invention can reduce the application rate of a single herbicide, increase its effectiveness at the same application rate, control varieties that have not yet been controlled, control varieties that are tolerant or resistant to a single or multiple herbicides, extend the application period and / or reduce the number of individual applications required; and for users, it provides a more economically and ecologically advantageous weed control system. Detailed Implementation

[0073] Biological test cases

[0074] method:

[0075] The technical grade of propyzamide and active component (B) in the table were dissolved in acetone to prepare stock solutions for single agents, and then diluted with an aqueous solution containing 0.1% Tween-80 to the required concentration.

[0076] The seeds of the weeds to be tested were dry-sown in plastic pots with a diameter of 20 cm and covered with 1 cm of soil. The next day, the prepared test agent was evenly applied to the soil surface using a DeVries, SB6-202 mobile sprayer, with a water control included; each treatment had 3 replicates. After treatment, the test materials were placed in a ventilated place to air dry naturally for 2-3 hours. Do not spray the leaves of the test materials for 3 days after treatment; instead, irrigate by drip irrigation and manage in a greenhouse. 21 days after application, the fresh weight of the aboveground parts was weighed, and the fresh weight control efficacy was calculated.

[0077] Fresh weight control efficacy (%) = (fresh weight of control weeds - fresh weight of treated weeds) / fresh weight of control weeds × 100

[0078] The expected effects of a specific combination of two active compounds can be described using the so-called "Colby formula" (see SRColby, "Calculating Synergistic and Antagonistic Responses of Herbicide Combinations", Weeds 1967, 15, 20-22).

[0079] Colby's expected value is calculated using the following formula:

[0080]

[0081] X represents the efficacy of the active ingredient (A) at a dose of mg / ha or a concentration of mppm;

[0082] Y represents the efficacy of the active ingredient (B) at a dose of ng / ha or a concentration of nppm;

[0083] E is the expected value for active components (A) and (B) at doses of m and ng / ha or concentrations of m and nppm;

[0084] When the actual weed control efficacy tested is greater than the efficacy expected according to the Colby formula, then the mixture is super-additive, meaning it has a synergistic effect.

[0085] Table 1. Control efficacy against barnyard grass

[0086]

[0087] Table 2. Control efficacy against Cyperus difformis

[0088]

[0089] Table 3. Prevention efficacy against Echinococcus senticosus

[0090]

[0091] Table 4 shows the preventive effect against snakehead fish.

[0092]

[0093] The experimental results show that the combination of propyzamide and active ingredient (B) has a significantly better weed control effect than the application of propyzamide and active ingredient (B) alone, with a significant synergistic effect.

Claims

1. A herbicidal composition, characterized in that, The composition comprises active component (A) propyne fluroxypyr and active component (B) quizalofop-p-ethyl, wherein the weight ratio of active component (A) to active component (B) is 1:1 to 1:

100.

2. The herbicidal composition according to claim 1, characterized in that, The active component (B) is selected from quizalofop-P-ethyl, and the weight ratio of quizalofop-P-ethyl to quizalofop-P-ethyl is 1:5-1:

100.

3. The herbicidal composition according to claim 1, characterized in that, The active component (B) is selected from quizalofop-P-ethyl, and the weight ratio of quizalofop-P-ethyl to quizalofop-P-ethyl is 1:10-1:

80.

4. The herbicidal composition according to claim 1, characterized in that, The active component (B) is selected from quizalofop-P-ethyl, and the weight ratio of quizalofop-P-ethyl to quizalofop-P-ethyl is 1:10-1:

60.

5. The herbicidal composition according to claim 1, characterized in that, The active component (B) is selected from quizalofop-P-ethyl, and the weight ratio of quizalofop-P-ethyl to quizalofop-P-ethyl is 1:10-1:

50.

6. The herbicidal composition according to claim 1, characterized in that, The herbicidal composition can be formulated into wettable powder, emulsifiable concentrate, suspension concentrate, oil suspension concentrate, microcapsule, microemulsion, water emulsion, suspension emulsion, water-dispersible granules, microcapsule suspension-suspension concentrate, and ultra-low volume liquid.

7. Use of the herbicidal composition of claim 1 for controlling the germination or growth of weeds in useful plants, wherein the useful plants are selected from wheat, barley, rye, triticale, oats, corn, peanuts, soybeans, cotton, sugarcane, potatoes, rice, citrus, and grapes; and the weeds are barnyard grass, Cyperus difformis, Echinochloa crus-galli, and Eclipta prostrata.

8. The use of the herbicidal composition of claim 1 in controlling the germination or growth of weeds in rice, soybean, corn, cotton and peanut crops, wherein the weeds are barnyard grass, sedge, sedge, and wormwood.

9. A method for controlling the germination or growth of weeds, characterized in that, include: (i) before the weeds germinate; (ii) after the weeds germinate; or (iii) in (i) and (ii), applying an effective amount of the herbicidal composition of claim 1 to the weeds or their growing area, wherein the weeds are barnyard grass, Cyperus difformis, Echinochloa crus-galli, or Eclipta prostrata.

10. A method for controlling the germination or growth of weeds, characterized in that, The herbicidal composition of claim 1 is applied to the soil to control the germination or growth of weeds, wherein the weeds are barnyard grass, sedge, wormwood, and edema.

11. A method for controlling the germination or growth of weeds, characterized in that, The herbicidal composition of claim 1 is applied to weeds or their growing areas to control the germination or growth of weeds, wherein the weeds are barnyard grass, sedge, wormwood, and angelica sinensis.

12. A method for controlling the germination or growth of weeds, characterized in that, The herbicidal composition of claim 1 is applied to the soil before weed germination or to the leaves after weed germination to control the germination or growth of weeds, wherein the weeds are barnyard grass, sedge, angelica, and edema.

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