Herbicide composition and application thereof

Abstract

The invention relates to the technical field of herbicides, in particular to a herbicide composition and application thereof. The invention provides a herbicide composition and application thereof. The active ingredients of the herbicide composition contain metazosulfuron, mesotrione and terbuthylazine. According to the weeding composition, the metazosulfuron, the mesotrione and the terbuthylazine are compounded together, and test determination shows that after the metazosulfuron, the mesotrione and the terbuthylazine are compounded, the weeding composition has an excellent control effect on annual weeds in corn and sugarcane fields, is safe to corn and sugarcane, and is suitable for agricultural popularization and application.

Description

Technical Field

[0001] The present invention relates to the technical field of herbicides, and in particular to a herbicide composition and application thereof. Background Art

[0002] Herbicides can be used to control weeds in farmland or kill weeds or shrubs in non-agricultural land. Metazosulfuron, mesotrione, terbuthylazine, etc. are all herbicides known in the art. Among them, metazosulfuron, CAS registration number: 868680-84-6, molecular formula: C 15 H 18 ClN7O7S, a sulfonylurea inhibitor, inhibits ALS (acetolactate synthase) or AHAS (acetohydroxyacid synthase), and has high control activity against annual and perennial weeds. Mesotrione, CAS registration number: 104206-82-8, molecular formula: C 14 H 13 NO7S is a triketone inhibitor that inhibits HPPD (hydroxyphenylpyruvate dioxidase). It is mainly used to treat annual broadleaf weeds and some grass weeds in corn fields. However, in actual use, mesotrione causes phytotoxicity to corn under certain conditions, and the weed control is not thorough, and the weeds are easy to turn green. Terbuthylazine, CAS registration number 5915-41-3, molecular formula: C9H 16 ClN5, a triazine inhibitor, inhibits the light-deteriorated electron transfer of the photosystem II receptor department, can control annual broadleaf and grass weeds, and is better than grass weeds for broadleaf weeds, and slightly worse for perennial weeds. Due to the long-term, large-scale, single and unreasonable use of herbicides, the control effect of herbicides is significantly reduced, and the occurrence of weed resistance is caused at the same time. Reasonable compounding or mixing of herbicide compounds may effectively delay the occurrence of weed resistance, expand the weed control spectrum, and improve the weed control effect, which is one of the directions for optimizing the weed control effect. At present, no scheme for compounding pyrazosulfuron, mesotrione and terbuthylazine has been found. In view of this, the present invention is specially proposed. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a herbicide composition and its application. The active ingredients of the herbicide composition contain pyrazosulfuron-methyl, mesotrione and terbuthylazine, which show excellent synergistic effect after compounding, have a wide weed control spectrum, excellent weed control effect, and reduce the dosage of pesticides, thereby reducing the cost of pesticides for farmers and the degree of impact on the environment.

[0004] Specifically, the technical solution of the present invention is as follows: In a first aspect, the present invention provides a herbicide composition, comprising effective active ingredients and adjuvants, wherein the effective active ingredients include pyrazosulfuron-methyl, mesotrione and terbuthylazine.

[0005] Preferably, the weight ratio of pyrazosulfuron-methyl, mesotrione and terbuthylazine is 5-50:20-100:100-1000.

[0006] Preferably, the weight ratio of pyrazosulfuron-methyl, mesotrione and terbuthylazine is 5-45:25-90:50-900.

[0007] Preferably, the weight ratio of pyrazosulfuron-methyl, mesotrione and terbuthylazine is 10-40:30-90:100-800.

[0008] Preferably, the weight ratio of pyrazosulfuron-methyl, mesotrione and terbuthylazine is 15-35:34-85:150-600.

[0009] Preferably, the weight ratio of pyrazosulfuron-methyl, mesotrione and terbuthylazine is 10-30:40-80:200-400.

[0010] Preferably, the mass percentage content of the active ingredient in the herbicide composition is 1-99%, more preferably 5-70%, more preferably 10-50%.

[0011] Preferably, the adjuvant comprises a pesticide-acceptable surfactant and a carrier.

[0012] Preferably, the herbicide composition is in the form of emulsifiable concentrate, water emulsion, water suspension, oil suspension, suspoemulsion, dispersible oil suspension, wettable powder, soluble powder, microcapsule suspension, microemulsion, water dispersible granules or soluble granules.

[0013] In a second aspect, the present invention provides use of the herbicide composition in controlling annual and perennial grass and / or broadleaf weeds.

[0014] Preferably, the application comprises: using the herbicide composition to control annual and perennial grass and / or broadleaf weeds in corn or sugarcane fields.

[0015] Further preferably, the weeds are one or more of Setaria viridis, Digitaria sanguinea, Echinochloa macrophylla, Poa annua, Alopecurus mume, Amaranthus retroflexus, Chenopodium album, Commelina communis, Purslane, Cirsium japonicum, Prickly earthworm, Abutilon, Setaria viridis and Wild oats.

[0016] More preferably, the weeds are barnyard grass, crabgrass, Amaranthus retroflexus and velvetleaf.

[0017] Beneficial effects: The present invention provides a herbicide composition and its application. The active ingredients of the herbicide composition contain pyrazosulfuron-methyl, mesotrione and terbuthylazine. The present invention compounds the three effective ingredients of pyrazosulfuron-methyl, mesotrione and terbuthylazine together. According to experimental determination, the three compounds show a significant synergistic effect after compounding, have excellent control effects on annual weeds in corn and sugarcane fields, are safe for corn and sugarcane, and are suitable for agricultural promotion and use. DETAILED DESCRIPTION

[0018] The invention provides a herbicide composition, wherein the active ingredients of the herbicide composition contain pyrazosulfuron-methyl, mesotrione and terbuthylazine.

[0019] Although in the present invention, the active ingredients can show significant synergistic effect as long as they include oxazolidinone, mesotrione and terbuthylazine, from the perspective of further improving the synergistic effect: the weight ratio of oxazolidinone, mesotrione and terbuthylazine is (5-50): (20-100): (100-1000); preferably, the weight ratio of oxazolidinone, mesotrione and terbuthylazine is (5-45): (25-90): (5 0~900); preferably, the weight ratio of azinepyrazosulfuron-methyl, mesotrione and terbuthylazine is (10~40):(30~90):(100~800); preferably, the weight ratio of azinepyrazosulfuron-methyl, mesotrione and terbuthylazine is (15~35):(34~85):(150~600); preferably, the weight ratio of azinepyrazosulfuron-methyl, mesotrione and terbuthylazine is (10~30):(40~80):(200~400.

[0020] In the herbicide composition of the present invention, the content of the active ingredient in the herbicide composition can vary within a wide range. Specifically, the content of the active ingredient in the composition is 1-99% by weight, preferably 5-70% by weight, and more preferably 10-50% by weight. Specific examples of the content of the active ingredient in the composition include: 1 weight%, 2 weight%, 3 weight%, 4 weight%, 5 weight%, 6 weight%, 7 weight%, 8 weight%, 9 weight%, 10 weight%, 11 weight%, 12 weight%, 13 weight%, 14 weight%, 15 weight%, 16 weight%, 17 weight%, 18 weight%, 19 weight%, 20 weight%, 21 weight%, 22 weight%, 23 weight%, 24 weight%, 25 weight%, 26 weight%, 27 weight%, 28 weight%, 29 weight%, 30 weight%, 31 weight%, 32 weight%, 33 weight%, 34 weight%, 35 weight%, 36 weight%, 37 weight%, 38 weight%, 39 weight%, 40 weight%, 41 weight%, 42 weight%, 43 weight%, 44 weight%, 45 weight%, 46 weight%, 47 weight%, 48 weight%, 49 weight%, 50 weight %, 51 weight %, 52 weight %, 53 weight %, 54 weight %, 55 weight %, 56 weight %, 57 weight %, 58 weight %, 59 weight %, 60 weight %, 61 weight %, 62 weight %, 63 weight %, 64 weight %, 65 weight %, 66 weight %, 67 weight %, 68 weight %, 69 weight %, 70 weight %, 71 weight %, 72 weight %, 73 weight %, 74 weight %, 75 weight %, 76 weight %, 77 weight %, 78 weight %, 79 weight %, 80 weight %, 81 weight %, 82 weight %, 83 weight %, 84 weight %, 85 weight %, 86 weight %, 87 weight %, 88 weight %, 89 weight %, 90 weight %, 91 weight %, 92 weight %, 93 weight %, 94 weight %, 95 weight %, 96 weight %, 97 weight %, 98 weight %, 99 weight %, etc., and the numerical range formed by any two of them.

[0021] The herbicide composition of the present invention may contain, in addition to the active ingredient, an agrochemically acceptable surfactant and a carrier.

[0022] The above-mentioned surfactant can be any surfactant known in the field of pesticide formulations. In the present invention, it is preferably one or more of an emulsifier, a dispersant and a wetting agent.

[0023] The above-mentioned emulsifier can be various emulsifiers well known in the field of pesticide formulations. Specifically, the emulsifier can be one or more of calcium dodecylbenzene sulfonate, triphenyl phenol polyoxyethylene ether phosphate, fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether, alkylphenol polyoxyethylene polyoxypropylene ether, fatty amine, ethylene oxide adduct of fatty amide, fatty acid polyoxyethylene ester, rosin acid ethylene oxide adduct, polyol fatty acid ester and ethylene oxide adduct thereof, styrylphenyl polyoxyethylene ether, alkylphenol formaldehyde resin polyoxyethylene ether, terminal hydroxyl polyoxyethylene polyoxypropylene ether, styrylphenol formaldehyde resin, polyoxyethylene polyoxypropylene ether and castor oil polyoxyethylene ether.

[0024] The above-mentioned dispersant can be various dispersants known in the field of pesticide formulations. Specifically, the dispersant can be one or more of acrylic acid homopolymer sodium salt, maleic acid disodium salt, naphthalenesulfonic acid formaldehyde condensate sodium salt, rosin block polyoxyethylene ether polyoxypropylene ether sulfonate, terminal hydroxyl polyoxyethylene polyoxypropylene ether block copolymer, triphenyl phenol polyoxyethylene ether phosphate, fatty alcohol polyoxyethylene ether phosphate, p-hydroxyphenyl lignin sulfonate sodium salt and calcium lignin sulfonate.

[0025] The wetting agent can be any wetting agent known in the field of pesticide formulations. Specifically, the wetting agent can be one or more of sodium dodecyl sulfate, sodium secondary alkyl sulfate, sodium dodecylbenzene sulfonate, fatty alcohol polyoxyethylene ether, alkyl naphthalene sulfonate, and alkylphenol resin polyoxyethylene ether sulfate.

[0026] The other carriers except the above-mentioned surfactants can be various carriers known in the field of pesticide formulations, including various silicates, carbonates, sulfates, oxides, phosphates, plant carriers, and synthetic carriers. Specifically, for example, the carrier can be one or more of white carbon black, kaolin, diatomaceous earth, clay, talc, organic bentonite, pumice, titanium dioxide, dextrin, cellulose powder, light calcium carbonate, soluble starch, corn starch, sawdust powder, urea, amine fertilizer, a mixture of urea and amine fertilizer, glucose, maltose, sucrose, anhydrous potassium carbonate, anhydrous sodium carbonate, anhydrous potassium bicarbonate, anhydrous sodium bicarbonate, attapulgite, a mixture of anhydrous potassium carbonate and anhydrous potassium bicarbonate, and a mixture of anhydrous sodium carbonate and anhydrous sodium bicarbonate.

[0027] The herbicide composition of the present invention may further contain various formulation adjuvants commonly used in the field of pesticide formulations. Specifically, the formulation adjuvant may be one or more of a solvent, a cosolvent, a thickener, an antifreeze agent, a protective agent, a defoaming agent, a disintegrant, a stabilizer, a preservative and a binder.

[0028] The above-mentioned solvent may be any solvent known in the field of pesticide formulations. Specifically, the solvent may be one or more of an organic solvent, vegetable oil, mineral oil, solvent oil and water.

[0029] The organic solvent includes one or more of N-methylpyrrolidone, tetrahydrofuran, dimethyl sulfoxide, N,N-dimethyldecylamide, N,N-dimethylformamide, trimethylbenzene, tetramethylbenzene, xylene, toluene, octane, heptane, methanol, isopropanol, n-butanol, tetrahydrofurfuryl alcohol, tributyl phosphate, 1,4-dioxane and cyclohexanone.

[0030] The vegetable oil includes one or more of methylated vegetable oil, rosin-based vegetable oil, turpentine oil, epoxidized soybean oil, soybean oil, peanut oil, rapeseed oil, castor oil, corn oil and pine nut oil.

[0031] The mineral oil includes one or more of liquid wax, motor oil, kerosene and lubricating oil.

[0032] At the same time, the above solvents can also be used as co-solvents.

[0033] The antifreeze agent may be any antifreeze agent known in the field of pesticide formulations. In the present invention, the antifreeze agent is preferably one or more of ethylene glycol, propylene glycol, glycerol and urea.

[0034] The thickener may be any thickener known in the field of pesticide formulations. Specifically, the thickener may be one or more of xanthan gum, polyvinyl alcohol, polypropylene alcohol, polyethylene glycol, white carbon black, diatomaceous earth, kaolin, clay, sodium alginate, magnesium aluminum silicate, sodium aluminum silicate, carboxymethyl cellulose, sodium hydroxypropyl cellulose and organic bentonite.

[0035] The defoaming agent can be any defoaming agent known in the field of pesticide formulations. In the present invention, it is preferably one or more of organosiloxane, tributyl phosphate and silicone.

[0036] The stabilizer is selected from one or more of triphenyl phosphite, epichlorohydrin and acetic anhydride.

[0037] The preservative is selected from one or more of benzoic acid, sodium benzoate, 1,2-benzisothiazolin-3-one (BIT for short), kasone and potassium sorbate.

[0038] According to the present invention, the formulation of the herbicide composition can be various formulations commonly used in the art, for example, the formulation of the herbicide composition can be emulsifiable concentrate, aqueous emulsion, aqueous suspension, oil suspension, suspoemulsion, dispersible oil suspension, wettable powder, soluble powder, microcapsule suspension, microemulsion, water dispersible granules or soluble granules. The above formulations can be prepared by conventional methods in the art, and the present invention has no special requirements.

[0039] Preferably, the emulsifiable concentrate preparation is composed of 1-95% active ingredient, 0-20% cosolvent, 1-30% emulsifier, and the solvent is supplemented to 100% by weight.

[0040] The preparation method of the emulsifiable concentrate preparation may include, for example, mixing and stirring the active components, solvent, co-solvent and emulsifier to form a uniform and transparent oil phase, thereby obtaining the emulsifiable concentrate preparation.

[0041] Preferably, the aqueous emulsion or microemulsion is composed of 1-95% active ingredient, 1-30% emulsifier, 0-30% cosolvent, 1-30% solvent, 0-10% antifreeze agent, 0-10% thickener, and water to 100% by weight.

[0042] Preferably, the method for preparing the aqueous emulsion may include, for example, mixing the active ingredient, emulsifier, cosolvent and solvent to form a uniform oil phase; mixing water, thickener, antifreeze agent, etc. to form a uniform water phase. Under high-speed shearing, the water phase is added to the oil phase or the oil phase is added to the water phase to form an aqueous emulsion with good dispersibility.

[0043] Preferably, the aqueous suspension comprises, by weight percentage, 1-95% active ingredient, 1-30% surfactant, 1-10% antifreeze agent, 0.1-5% thickener, and water to 100%.

[0044] Preparation method of water suspension: using water as medium, add active component surfactant and auxiliary agent into sand mill, grind to a certain particle size, filter. Then add measured thickener into the ground mother liquor, shear and disperse evenly to make water suspension.

[0045] Preferably, the suspoemulsion is composed of 1-95% active ingredient, 1-30% solvent, 1-30% emulsifier, 1-30% surfactant, 1-10% antifreeze agent, 0.1-5% thickener, and water to 100% by weight.

[0046] Preparation method of suspoemulsion: using water as medium, add two active components, surfactant and auxiliary agent, etc. into sand mill, grind to a certain particle size, filter, complete the preparation of suspension component, and set aside; another active component is used to prepare emulsion component according to the above-mentioned water emulsion preparation method; the suspension component and emulsion component are mixed evenly according to the proportion to prepare suspoemulsion. Then add the measured thickener into the ground mother liquor, disperse evenly, and prepare suspoemulsion.

[0047] Preferably, the dispersible oil suspension comprises, by weight percentage, 1-95% active ingredient, 1-30% surfactant, 1-10% antifreeze agent, 0.1-5% thickener, and oil to make up to 100%.

[0048] Preparation method of dispersible oil suspension: using oil as medium, add active component surfactant and auxiliary agent into sand mill, grind to a certain particle size, filter. Then add measured thickener into the ground mother liquor, shear and disperse evenly, and make dispersible oil suspension.

[0049] Preferably, the water dispersible granules or wettable powders are composed of 1-95% active ingredient, 1-30% surfactant, and other carriers to make up to 100% by weight.

[0050] The preparation method of water-dispersible granules is as follows: the active components, dispersants, wetting agents and carriers are mixed evenly, and then crushed to a certain particle size by air flow, and then water is added for kneading, and finally added to a granulator for granulation, and water-dispersible granules or soluble granules can be obtained after drying.

[0051] The preparation method of wettable powder is: fully mix the active ingredients, various adjuvants and other carriers and other fillers, and grind them with an ultrafine grinder.

[0052] The herbicide composition provided by the present invention exhibits an excellent synergistic effect. The mixed composition significantly improves the weed control effect compared with its single agent, reduces the dosage of pesticides used, and thus reduces the pesticide cost for farmers and the impact on the environment.

[0053] The herbicide composition provided by the invention can control multiple weeds at the same time, is easy to use and highly effective, and has good control effects on annual and perennial grass and broad-leaved weeds in corn and sugarcane fields.

[0054] The herbicide composition provided by the present invention is a composite combination of herbicides with different action mechanisms, so that the herbicidal properties of the herbicides of each component are well complemented, and the occurrence and development of weed resistance to a single agent can be effectively delayed.

[0055] Furthermore, the present invention provides a preparation prepared by the herbicide composition of the present invention.

[0056] Furthermore, the present invention also provides the use of the above-mentioned herbicide composition in preventing and controlling annual and perennial grass and broad-leaved weeds.

[0057] More specifically and preferably, the present invention provides the use of the above-mentioned herbicide composition in controlling annual and perennial grass and broad-leaved weeds in corn and sugarcane fields.

[0058] Preferably, the weeds are one or more of Setaria viridis, Echinochloa crusgalli, Digitaria sanguinea, Goosegrass, Leptochloa chinensis, Commelina communis, Portulaca oleracea, Cirsium sphaerocephala, Chenopodium album, Abutilon, Prunella vulgaris and Wild oats; more preferably, the weeds are one or more of Echinochloa crusgalli, Digitaria sanguinea, Amaranthus retroflexus and Abutilon.

[0059] The present invention unexpectedly discovered during the research process that the compound use of pyrazosulfuron-methyl, mesotrione and terbuthion herbicides having different structural types and mechanisms of action has an obvious synergistic effect, which can improve the control effect of these three components on annual and perennial grass and broad-leaved weeds to a greater extent, while improving crop safety and yield.

[0060] In particular, the present invention unexpectedly discovered that the herbicide composition provided by the present invention has extremely excellent control effects on barnyard grass, crabgrass, Amaranthus retroflexus and velvetleaf, and is also highly safe for crops (such as corn).

[0061] The herbicide composition of the present invention can be provided in the form of a finished preparation, that is, the various substances in the composition have been mixed; it can also be provided in the form of a separate preparation, which can be mixed in a bucket or tank before use and selectively mixed with water for dilution according to the required concentration of the active substance.

[0062] The composition of the present invention may also be used in admixture with other compounds having fungicidal, insecticidal or herbicidal properties, or with nematicides, protectants, growth regulators, plant nutrients or soil conditioners.

[0063] According to the present invention, the specific application method of the herbicide composition is generally to spray the whole corn field with the herbicide composition of the present invention when the corn is in the 3-5 leaf stage and the weeds are in the 2-5 leaf stage. The application method is stem and leaf spraying, and the application method is simple.

[0064] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described clearly and completely below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0065] The endpoints and any values ​​of the ranges disclosed in this specification are not limited to the precise ranges or values, and these ranges or values ​​should be understood to include values ​​close to these ranges or values. For numerical ranges, the endpoint values ​​of each range, the endpoint values ​​of each range and the individual point values, and the individual point values ​​can be combined with each other to obtain one or more new numerical ranges, which should be considered as specifically disclosed in this article.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "specific implementations", or "some specific implementations" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0067] In the examples provided in this specification, if no specific techniques or conditions are specified, the techniques or conditions described in the literature in this field or the product instructions are used. If the manufacturer of the reagents or instruments used is not specified, they are all conventional products that can be purchased through regular channels.

[0068] The purity of the pyrazosulfuron-methyl technical used in the following examples and comparative examples is 91%, and the manufacturer is Nissan Chemical Co., Ltd.; the purity of the mesotrione technical is 98%, and the manufacturer is Shangyu Yingtai Fine Chemical Co., Ltd.; the purity of the terbuthylazine technical is 97%, and the manufacturer is Xiangshui Zhongshan Biotechnology Co., Ltd. In the following examples, the amount of the herbicidal composition is the actual amount, that is, the amount after deducting impurities.

[0069] Example 1 This example provides a herbicidal composition (25.5 wt % of pyrazosulfuron-methyl-mesotrione-terbuthion emulsifiable concentrate).

[0070] The formula is: 10g of pyrazosulfuron-methyl, 45g of mesotrione, 200g of terbuthylazine, 300g of solvent oil 150# (co-solvent), 40g of calcium dodecylbenzene sulfonate (emulsifier), 60g of tristyrylphenol polyoxyethylene ether (emulsifier), and xylene (solvent) made up to 1kg.

[0071] The preparation method is as follows: the above-mentioned weight amounts of pyrazosulfuron-methyl, mesotrione, terbuthylazine, solvent oil 150#, calcium dodecylbenzenesulfonate, castor oil polyoxyethylene ether, and solvent oil 150 are mixed into a uniform oil phase to obtain an emulsifiable concentrate containing 25.5 weight % of the active ingredient.

[0072] Example 2 This example provides a herbicidal composition (48 wt % of azoxystrobin-pyrazosulfuron-methyl-mesotrione-terbuthion emulsion in water).

[0073] The formula is: 10g of pyrazosulfuron-methyl, 70g of mesotrione, 400g of terbuthylazine, 300g of N,N-dimethylformamide, 40g of castor oil polyoxyethylene ether, 40g of fatty alcohol polyoxyethylene ether, 50g of 1,2-propylene glycol, 10g of xanthan gum, and make up to 1kg with water.

[0074] The preparation method is as follows: the above-mentioned pyrazosulfuron-methyl, mesotrione, terbuthylazine, N-methylpyrrolidone, castor oil polyoxyethylene ether, and fatty alcohol polyoxyethylene ether are mixed into a uniform oil phase; ethylene glycol, xanthan gum and water are mixed into a uniform aqueous phase; under high-speed stirring, the oil phase is added to the aqueous phase to form an aqueous emulsion with good dispersibility containing 48% by weight of the active ingredient.

[0075] Example 3 This example provides a herbicidal composition (27% by weight of azoxystrobin-pyrazosulfuron-methyl-mesotrione-terbuthylazine dispersible oil suspension concentrate).

[0076] The formula is: 25g of pyrazosulfuron-methyl, 45g of mesotrione, 200g of terbuthylazine, 60g of polyoxyethylene fatty acid ester, 40g of sorbitan polyoxyethylene ether, 40g of organic bentonite, and methyl oleate is made up to 1kg.

[0077] The preparation method is as follows: using methyl oleate as a medium, adding the above-mentioned pyrazosulfuron-methyl, mesotrione and terbuthylazine, polyoxyethylene fatty acid esters, sorbitol polyoxyethylene ether, and organic bentonite into a sand mill and grinding them into fine powder, so as to obtain an oil suspension containing 27% by weight of the active ingredient.

[0078] Example 4 This example provides a herbicidal composition (29% by weight of azoxystrobin-pyrazosulfuron-methyl-mesotrione-terbuthylazine suspension concentrate).

[0079] The formula is: 30g of pyrazosulfuron-methyl, 60g of mesotrione, 200g of terbuthylazine, 60g of naphthalenesulfonate (dispersant), 40g of polyoxyethylene ether (wetting agent), 150g of glycerol (antifreeze agent), 60g of sodium alginate (thickener), 5g of silicone defoaming agent, and water is added to 1000g.

[0080] The preparation method is as follows: using water as a medium, adding the above-mentioned weights of pyrazosulfuron-methyl, mesotrione, terbuthylazine, naphthalenesulfonate, polyoxyethylene ether, glycerol, sodium alginate, silicone defoamer and water into a shear kettle, shearing evenly and then grinding into a sand mill kettle to obtain a suspension containing 29 weight % of the active ingredient.

[0081] Example 5 This example provides a herbicidal composition (27.5 wt % of azoxystrobin-pyrazosulfuron-methyl-mesotrione-terbuthylazine suspoemulsion).

[0082] The formula is: 30g of pyrazosulfuron-methyl, 40g of mesotrione, 205g of terbuthylazine, 300g of solvent oil No. 200, 80g of calcium dodecylbenzene sulfonate, 80g of fatty alcohol polyoxyethylene ether, 30g of xanthan gum, 60g of propylene glycol, and make up to 1kg with water.

[0083] The preparation method is as follows: using water as a medium, adding the above-mentioned oxazolidinone, mesotrione, calcium dodecylbenzene sulfonate, fatty alcohol polyoxyethylene ether, xanthan gum, and propylene glycol into a sand mill and grinding them into fine powder to obtain an oxazolidinone pyrazosulfuron-methyl·mesotrione aqueous suspension; fully mixing terbuthylazine, solvent oil No. 150, sodium dodecylbenzene sulfonate, and fatty alcohol polyoxyethylene ether to form an oil phase; adding the oil phase to the oxazolidinone pyrazosulfuron-methyl·mesotrione aqueous suspension to obtain a suspoemulsion containing 27.5% by weight of the active ingredient.

[0084] Example 6 This example provides a herbicidal composition (29% by weight of pyrazosulfuron-methyl-mesotrione-terbuthion water dispersible granules).

[0085] The formula is: 20g of pyrazosulfuron-methyl, 60g of mesotrione, 210g of terbuthylazine, 150g of rosin block polyoxyethylene ether polyoxypropylene ether sulfonate, 50g of calcium lignin sulfonate, 100g of starch, and diatomaceous earth is supplemented to 1kg.

[0086] The preparation method is as follows: the above-mentioned pyrazosulfuron-methyl, mesotrione, terbuthylazine, rosin block polyoxyethylene ether polyoxypropylene ether sulfonate, calcium lignin sulfonate, starch and diatomaceous earth are mixed and crushed, and then extruded and granulated to prepare water-dispersible granules containing 29% by weight of the active ingredient.

[0087] Example 7 This example provides a herbicidal composition (23% by weight of pyrazosulfuron-methyl-mesotrione-terbuthion wettable powder).

[0088] The formula is: 15g of pyrazosulfuron-methyl, 25g of mesotrione, 190g of terbuthylazine, 100g of sodium dodecyl sulfate (wetting agent), 150g of naphthalenesulfonate (dispersant), and ammonium sulfate (filler) to make up to 1000g.

[0089] The preparation method is as follows: the above-mentioned weight amounts of pyrazosulfuron-methyl, mesotrione, terbuthylazine, sodium lauryl sulfate, naphthalenesulfonate and ammonium sulfate are mixed and crushed to prepare a wettable powder containing 23 weight % of active ingredients.

[0090] Example 8 This example provides a herbicidal composition (38% by weight of pyrazosulfuron-methyl-mesotrione-terbuthion wettable powder).

[0091] The formula is: 30g of pyrazosulfuron-methyl, 70g of mesotrione, 280g of terbuthylazine, 80g of alkylphenol polyoxyethylene ether sulfate (wetting agent), 80g of sodium hydroxyphenyl lignin sulfonate (dispersant), 20g of white carbon black (filler), and 1kg of light calcium carbonate.

[0092] The preparation method is as follows: the above-mentioned weight amounts of pyrazosulfuron-methyl, mesotrione, terbuthylazine, alkylphenol polyoxyethylene ether sulfate, sodium hydroxyphenyl lignin sulfonate, white carbon black and light calcium carbonate are mixed and crushed to prepare a wettable powder containing 38 weight % of active ingredients.

[0093] Comparative Example 1 Water dispersible granules of pyrazosulfuron-methyl with an active ingredient content of 33%.

[0094] Comparative Example 2 A mesotrione suspension concentrate with an active ingredient content of 40%.

[0095] Comparative Example 3 Terbuthylazine suspension with an active ingredient content of 50%.

[0096] Comparative Example 4 This comparative example provides a herbicidal composition (12% by weight of azoxystrobin-pyrazosulfuron-methyl-mesotrione suspension concentrate).

[0097] The formula is: 30g of pyrazosulfuron-methyl, 90g of mesotrione, 60g of naphthalenesulfonate (dispersant), 40g of polyoxyethylene ether (wetting agent), 150g of glycerol (antifreeze agent), 60g of xanthan gum (thickener), 5g of silicone defoaming agent, and water is added to 1000g.

[0098] The preparation method is as follows: using water as a medium, adding the above-mentioned weight of pyrazosulfuron-methyl, mesotrione, naphthalenesulfonate, polyoxyethylene ether, propylene glycol, xanthan gum, silicone defoamer, and water into a shear kettle, shearing them evenly and then grinding them into a sand mill kettle to obtain a suspension containing 12 weight % of the active ingredient.

[0099] Comparative Example 5 This comparative example provides a herbicidal composition (32% by weight of pyrazosulfuron-methyl-terbuthylazine suspension concentrate).

[0100] The formula is: 20g of pyrazosulfuron-methyl, 300g of terbuthylazine, 60g of naphthalenesulfonate (dispersant), 40g of sodium dodecyl sulfate (wetting agent), 150g of glycerol (antifreeze agent), 60g of xanthan gum (thickener), 5g of silicone defoaming agent, and water is added to 1000g.

[0101] The preparation method is as follows: using water as a medium, adding the above-mentioned weight of pyrazosulfuron-methyl, mesotrione, naphthalenesulfonate, sodium lauryl sulfate, propylene glycol, xanthan gum, silicone defoamer, and water into a shear kettle, shearing evenly and then grinding into a sand mill kettle to obtain a suspension containing 32 weight % of the active ingredient.

[0102] Comparative Example 6 This comparative example provides a herbicidal composition (12% by weight of mesotrione-terbuthylazine suspension concentrate).

[0103] The formula is: 20g mesotrione, 100g terbuthylazine, 60g polycarboxylate (dispersant), 40g sodium lauryl sulfate (wetting agent), 150g propylene glycol (antifreeze), 60g xanthan gum (thickener), 5g silicone defoamer, and water to 1000g.

[0104] The preparation method is as follows: using water as a medium, adding the above-mentioned weight amounts of mesotrione, terbuthylazine, polycarboxylate, sodium lauryl sulfate, glycerol, xanthan gum, silicone defoamer and water into a shear kettle, shearing them evenly and then grinding them into a sand mill kettle to obtain a suspension containing 12 weight % of the active ingredient.

[0105] Test Example 1 This test example is an indoor combined action determination test.

[0106] Test targets: barnyard grass, crabgrass, amaranth, and ramie.

[0107] Preparation of the agent: The azine pyrazosulfuron technical drug in Comparative Example 1 was dissolved in an appropriate amount of N,N-dimethylformamide, the mesotrione technical drug in Comparative Example 2 and the terbuthylazine technical drug in Comparative Example 3 were dissolved in an appropriate amount of acetone, and the mother liquor was prepared to the required concentration with 0.1% Tween 80 aqueous solution for use.

[0108] Test method: Use the greenhouse pot method to sow weed seeds in small flower pots filled with 3 / 5 seedling substrate (field soil: nutrient soil: vermiculite = 3:1:1), sow 20 seeds in each pot, and cover the seeds with soil after sowing. Water by bottom penetration method, and pour out the excess water in the tray after the seedling substrate is completely soaked, and transfer to the artificial climate room for cultivation. When the weeds grow to the 2-4 leaf stage, thin out the seedlings, and keep 10 plants in each pot that grow evenly and do not block each other. Use ASS-5 walking spray tower for stem and leaf spray treatment, and set up a blank control with only adjuvants but no active ingredients. Continue to cultivate and observe, and investigate the fresh weight of the aboveground part of each treatment after 21 days. Except for 1-2 days before and after spraying, water regularly to maintain soil moisture.

[0109] The fresh weight rate of weeds was calculated according to the following formula.

[0110] Data statistical analysis methods: The herbicidal activity of the mixture was tested by the Colby method, that is, E0=ABC / 10000; where A is the fresh weight rate of weeds per single dose of comparative example 1 (oxazolidinone), B is the fresh weight rate of weeds per single dose of comparative example 2 (mesotrione), C is the fresh weight rate of weeds per single dose of comparative example 3 (terbuthion), E0 is the theoretical fresh weight rate of weeds per mixed herbicide, and E is the measured fresh weight rate of weeds per mixed herbicide. According to the Colby method, when E0-E>10%, it indicates that the mixed herbicide has a synergistic effect; when E0-E<-10%, it indicates that the mixed herbicide has an antagonistic effect; when the E0-E value is between ±10%, it indicates that the mixed herbicide has an additive effect.

[0111] The combined effect of the combination of pyrazosulfuron-methyl, mesotrione and terbuthylazine on grass weeds was tested, and the ratios and results are shown in Table 1; the combined effect on broad-leaved weeds was tested, and the ratios and results are shown in Table 2.

[0112] Table 1 Determination of the combined effects of pyrazosulfuron-methyl, mesotrione and terbuthylazine on grass weeds The results in Table 1 show that the combination of pyrazosulfuron-methyl, mesotrione and terbuthylazine, at the dosage provided, exhibited a significant synergistic effect on the grass weeds barnyard grass and crabgrass. Moreover, when the weight ratio of pyrazosulfuron-methyl, mesotrione and terbuthylazine was 10-30:40-80:200-400, the synergistic effect was significant.

[0113] Table 2 Determination of the combined effects of pyrazosulfuron-methyl, mesotrione and terbuthylazine on broadleaf weeds The results in Table 2 show that the combination of pyrazosulfuron-methyl, mesotrione and terbuthylazine, at the dosage provided, exhibited significant synergistic effects on the broadleaf weeds Amaranthus retroflexus and Abutilon. When the weight ratio of pyrazosulfuron-methyl, mesotrione and terbuthylazine was 10-30:40-80:200-400, the synergistic effect was significant.

[0114] Test Example 2 This test example further verifies the efficacy of the herbicide formulations of the embodiments and comparative examples on annual weeds in corn fields and their safety on corn.

[0115] The test was conducted in Zhaoquanying Town, Shunyi District, Beijing, and the field efficacy test for controlling annual weeds in corn was conducted using the embodiments and comparative examples.

[0116] Table 3 Field efficacy test results of herbicide formulations against annual weeds in corn fields From the results in Table 3, it can be seen that compared with single agents and two-by-two combinations, the ternary combination of pyrazosulfuron-methyl, mesotrione and terbuthylazine showed excellent control effects on barnyard grass, crabgrass and broad-leaved weeds Amaranthus retroflexus and velvetleaf at the trial dosage, and was highly safe for corn. The corn yield was not much different from manual weeding, and the corn yield could be effectively increased.

[0117] In summary, the herbicidal composition and herbicidal preparation provided by the present invention are used to control annual and perennial weeds in corn fields, which can not only improve the weed control effect, but also significantly reduce the amount of pesticides used and is safe for corn.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A herbicide composition comprising an effective active ingredient and an adjuvant, characterized in that: The effective active ingredients include pyrazosulfuron-methyl, mesotrione and terbuthylazine.

2. The herbicide composition according to claim 1, characterized in that: The weight ratio of pyrazosulfuron-methyl, mesotrione and terbuthylazine is 5~50:20~100:100~1000.

3. The herbicide composition according to claim 2, characterized in that: The weight ratio of pyrazosulfuron-methyl, mesotrione and terbuthylazine is 10~30:40~80:200~400.

4. The herbicide composition according to any one of claims 1 to 3, characterized in that: The mass percentage content of the active ingredient in the herbicide composition is 1-99%, preferably 5-70%, and more preferably 10-50%.

5. The herbicide composition according to any one of claims 1 to 4, characterized in that: The auxiliary materials include pesticide-acceptable surfactants and carriers.

6. The herbicide composition according to any one of claims 1 to 5, characterized in that: The dosage form is emulsifiable concentrate, water emulsion, water suspension, oil suspension, suspoemulsion, dispersible oil suspension, wettable powder, soluble powder, microcapsule suspension, microemulsion, water dispersible granules or soluble granules.

7. Use of the herbicide composition according to any one of claims 1 to 6 for controlling annual and perennial grass and / or broadleaf weeds.

8. The use according to claim 7, characterized in that: The herbicide composition is used for controlling annual and perennial grass and / or broadleaf weeds in corn or sugarcane fields.

9. The use according to claim 7 or 8, characterized in that: The weeds are one or more of foxtail grass, crabgrass, barnyard grass, bluegrass, foxtail grass, amaranth, quinoa, dayflower, purslane, thistle, purslane, ramie, foxtail and wild oats.

10. The use according to claim 9, characterized in that: The weeds are barnyard grass, crabgrass, Amaranthus retroflexus and velvetleaf.

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