Weeding composition, herbicide and application thereof

Abstract

The invention relates to the technical field of pesticides, and discloses a weeding composition, a herbicide and application thereof. The active ingredients of the weeding composition comprise florasulam, pinoxaden and halauxifen-methyl. The weight ratio of the florasulam to the pinoxaden to the halauxifen-methyl is 1 to (1 to 20) to (0.5 to 5). Compared with the combination of a single active component and a binary active component, the weeding composition has an obvious synergistic effect and can improve the control effect; the weeding composition can prevent and treat various different types of plant weeds caused by mixing, so that the dosage can be reduced, the cost is saved, and the safety to the environment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of pesticides, and particularly relates to a weeding composition, a herbicide and their applications. Background Art

[0002] In agricultural production practice, there are often problems of mixed occurrence of different types of grass damage. In wheat fields, Galium aparine, Lithospermum arvense, Euphorbia helioscopia, Capsella bursa-pastoris, Papaver rhoeas, Avena fatua, Setaria viridis, Echinochloa crusgalli are often present simultaneously or successively as grass damage.

[0003] Currently, the control of grass damage not only has poor control effects, but also continuous use of herbicides with a single active ingredient is likely to produce drug resistance. At the same time, different herbicides are usually required for different grass damages, which consumes a large amount of human, material and financial costs and also causes environmental pollution. Summary of the Invention

[0004] The purpose of the present invention is to overcome the problems existing in the prior art and provide a weeding composition, a herbicide and their applications.

[0005] To achieve the above purpose, in the first aspect of the present invention, a weeding composition is provided, wherein the active ingredients of the weeding composition include florasulam, pinoxaden and fluroxypyr-meptyl.

[0006] In the second aspect of the present invention, a herbicide prepared by using the weeding composition described in the first aspect is provided.

[0007] In the third aspect of the present invention, the application of the herbicide described in the second aspect in the treatment of grass damage in wheat fields is provided.

[0008] Through the above technical solutions, the beneficial technical effects obtained by the present invention are as follows:

[0009] The weeding composition of the present invention has a significant synergistic effect compared with a single active ingredient and a binary active ingredient combination, and can improve the control effect; it can control a variety of different types of plant grass damage that occur mixedly, thereby reducing the dosage of drugs, saving costs and improving the environmental safety. Detailed Embodiments

[0010] In the ranges disclosed herein, the endpoints and any value are not limited to the exact range or value, and these ranges or values should be understood to include values close to these ranges or values. For numerical ranges, between the endpoint values of each range, between the endpoint values and individual point values of each range, and between individual point values, they can be combined with each other to obtain one or more new numerical ranges, and these numerical ranges should be regarded as specifically disclosed herein.

[0011] The first aspect of the present invention provides a weeding composition, wherein the active ingredients of the weeding composition include florasulam, pinoxaden and halauxifen-methyl.

[0012] Florasulam is a super-efficient triazolopyrimidine sulfonamide herbicide and is a systemic herbicide that can be conducted to the whole plant of weeds, so the weed control is thorough and there will be no recurrence. Pinoxaden belongs to a new type of phenylpyrazoline herbicide, and its mechanism of action is an inhibitor of acetyl-CoA carboxylase (ACC), causing the synthesis of fatty acids to be blocked, the cell growth and division to stop, and the lipid structure of the cell membrane to be damaged, thus leading to the death of weeds. Halauxifen-methyl is an aryloxypicolinic acid ester herbicide among synthetic auxin herbicides. It is absorbed through the stems, leaves and roots of plants, binds to the hormone receptors in plants, stimulates the over-division of plant cells and blocks the conduction tissue, and finally causes the plants to die due to exhaustion of nutrients.

[0013] The English name of florasulam is florasulam, and its chemical name is 2,6-difluoro-5-methoxy-8-fluoro(1,2,4)triazolo(1,5-c)pyrimidine-2-sulfonanilide, with the molecular formula C 12 H8F3N5O3S, relative molecular weight 359.3, CAS number 145701-23-1, and the structural formula is as follows:

[0014]

[0015] The common English name of pinoxaden: pinoxaden, chemical name: 8-(2,6-diethyl-4-methylphenyl)-9-oxo-1,2,4,5-tetrahydro-9H-pyrazolo[1,2-d][1,4,5]oxadiazepin-2-yl 2,2-dimethylprop-2-ynoate, molecular formula C 23 H 32 N2O4, relative molecular weight: 400.5, CAS number 243973-20-8, and its structural formula is as follows:

[0016]

[0017] The common English name of halauxifen-methyl: Halauxifen-methyl, chemical name: methyl 4-amino-3-chloro-6-(2-fluoro-4-chloro-3-methoxyphenyl)pyridine-2-carboxylate, molecular formula C 14 H 11 Cl2FN2O3, relative molecular weight: 345.2, CAS number 943831-98-9, and its structural formula is as follows:

[0018]

[0019] In some embodiments of the present invention, in the herbicidal composition, the weight ratio of florasulam, pinoxaden, and fluroxypyr-meptyl is 1:1 - 20:0.5 - 5.

[0020] In some embodiments of the present invention, in the herbicidal composition, the weight ratio of florasulam, pinoxaden, and fluroxypyr-meptyl is 1:5 - 15:0.5 - 2, preferably 1:8:1.

[0021] In some embodiments of the present invention, in the herbicidal composition, the weight ratio of florasulam, pinoxaden, and fluroxypyr-meptyl is 1:2.5 - 20:1 - 4, preferably 1:10:1.

[0022] In some embodiments of the present invention, the herbicidal composition further comprises agriculturally acceptable adjuvants.

[0023] In some embodiments of the present invention, the adjuvants are selected from at least one of emulsifiers, solvents, cosolvents, dispersants, wetting agents, antifreezing agents, preservatives, thickeners, defoaming agents, safeners, acid-base adjusting media, and solid inert carriers.

[0024] In the present invention, the emulsifier can be one or more of cationic surfactants, anionic surfactants, nonionic surfactants, and zwitterionic surfactants, and any emulsifier commonly used in liquid formulations can be used. Preferably, the emulsifier is calcium dodecylbenzenesulfonate, benzylphenol polyoxyethylene ether phosphate, sorbitan trioleate, sodium succinate sulfonate, styrylphenol polyoxyethylene ether phosphate, polyoxyethylene sorbitol hexa-stearate, polyethylene glycol fatty acid ester, sorbitan tristearate, polyoxyethylene sorbitol ether beeswax derivative, polyethylene glycol monostearate, sorbitan sesquioleate, glycerol monostearate, sorbitan monooleate, sorbitan monostearate, dibenzylphenol polyoxyethylene ether, sorbitan monolaurate, polyoxyethylene lauryl ether, polyoxyethylene monopalmitate, diethylene glycol fatty acid ester, diethylene glycol monolaurate, alkylphenol polyoxyethylene ether, sorbitan polyoxyethylene ether, polyoxyethylene sorbitan ether monooleate, styrylphenol polyoxyethylene ether, polyoxyethylene lauryl ether, fatty alcohol polyoxyethylene ether, fatty amine polyoxyethylene ether, castor oil polyoxyethylene ether, preferably one or more of phenethylphenol polyoxyethylene ether, sorbitan trioleate, and sorbitan tristearate.

[0025] In some embodiments of the present invention, the emulsifier is selected from at least one of phenethylphenol polyoxyethylene ether, polyol fatty acid ester, polyvinyl alcohol, and diphenylethyl complex phenol polyoxyethylene ether.

[0026] In the present invention, the solvent may be one or more of methanol, ethanol, propanol, isopropanol, propylene glycol, glycerol, n-butanol, isobutanol, tert-butanol, n-pentanol, isopentanol, n-hexanol, n-heptanol, n-octanol, ethylene glycol, ethylene glycol monomethyl ether, ethylene glycol dimethyl ether, sorbitol, dichloromethane, aromatic hydrocarbon solvent oil, and methyl oleate, preferably one or more of aromatic hydrocarbon solvent oil and dichloromethane. The cosolvent may be one or more of methanol, isopropanol, dimethyl sulfoxide, N-methylpyrrolidone, sulfolane, and ethyl acetate.

[0027] In some embodiments of the present invention, the solvent and the cosolvent are each independently selected from at least one of xylene, cyclohexanone, dimethylformamide, dimethylacetamide, solvent oil, and dichloromethane.

[0028] In the present invention, the dispersant is selected from one or more of alkylnaphthalenesulfonates, bis(alkyl)naphthalenesulfonate formaldehyde condensates, naphthalenesulfonic acid formaldehyde condensates, alkylphenol polyoxyethylene ether formaldehyde condensate sulfates, calcium alkylbenzenesulfonates, sodium naphthalenesulfonic acid formaldehyde condensates, polycarboxylates, sodium lignosulfonates, arylphenol polyoxyethylene succinate sulfonates, octylphenol polyoxyethylene ether sulfates, alkylphenol polyoxyethylene ethers, fatty amine polyoxyethylene ethers, fatty acid polyoxyethylene esters, and ester polyoxyethylene ethers, preferably one or more of arylphenol polyoxyethylene succinate sulfonates, polycarboxylates, and sodium lignosulfonates.

[0029] In some embodiments of the present invention, the dispersant is selected from at least one of polycarboxylates, arylphenol polyoxyethylene succinate sulfonates, and sodium lignosulfonates.

[0030] In the present invention, the wetting agent is selected from one or more of sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, Nekal BX, agricultural emulsifier 2000# series, wetting penetrant, sodium lauryl sulfate, saponin powder, tea seed cake, silkworm excrement, and sapindus mukorossi powder, preferably one or more of sodium dodecyl sulfate, sodium dodecylbenzenesulfonate, and sodium lauryl sulfate.

[0031] In some embodiments of the present invention, the wetting agent is selected from at least one of sodium dodecylbenzenesulfonate, sodium dodecyl sulfate, and sodium lauryl sulfate.

[0032] In the present invention, the antifreeze may be one or more of ethylene glycol, 1,2-propanediol, glycerol, and urea.

[0033] In some embodiments of the present invention, the antifreeze is selected from at least one of ethylene glycol, propylene glycol, and glycerol.

[0034] In some embodiments of the present invention, the preservative is sodium benzoate and / or Kathon.

[0035] In the present invention, the thickener can be one or more of magnesium aluminum silicate, xanthan gum, polyethylene glycol, polyvinyl alcohol, carboxymethyl cellulose, and phenolic resin.

[0036] In some embodiments of the present invention, the thickener is magnesium aluminum silicate and / or xanthan gum.

[0037] In the present invention, the defoamer is selected from one or more of silicone, C8-C 10 fatty alcohols, C 10 -C 20 saturated fatty acids (such as capric acid) and amides, silicone oil, and silicone compounds.

[0038] In some embodiments of the present invention, the defoamer is an organosilicon defoamer.

[0039] In the present invention, the safener is selected from one or more of cloquintocet-mexyl, oxabetrinil, methyl oxabenzoate, and pyraclonil.

[0040] In some embodiments of the present invention, the safener is selected from cloquintocet-mexyl.

[0041] In the present invention, the acidifying medium is selected from one or more of ammonium chloride, hydrochloric acid, citric acid, ammonium sulfate, ammonium nitrate, and acetic acid; the alkalizing medium is selected from one or more of sodium hydroxide, triethanolamine, triethylamine, ammonia water, and sodium ethoxide.

[0042] In some embodiments of the present invention, the acidifying and alkalizing medium is selected from at least one of phosphoric acid, hydrochloric acid, citric acid, triethanolamine, and sodium hydroxide.

[0043] In the present invention, the solid inert carrier can be one or more of clay, diatomaceous earth, kaolin, silica, attapulgite, montmorillonite, bentonite, talcum powder, and light calcium carbonate.

[0044] In some embodiments of the present invention, the solid inert carrier is selected from at least one of silica, diatomaceous earth, and kaolin.

[0045] In some embodiments of the present invention, based on the total weight of the herbicidal composition, the content of the active ingredient is 1-80 wt%, preferably 1-40 wt%, more preferably 2-20 wt%, and most preferably 10 wt%.

[0046] The second aspect of the present invention provides a herbicide prepared by using the herbicidal composition described in the first aspect.

[0047] In some embodiments of the present invention, the dosage form of the herbicide is emulsifiable concentrate, aqueous suspension concentrate, oil suspension concentrate, microemulsion, water emulsion, microcapsule suspension, microcapsule suspension-suspension concentrate, wettable powder, or water dispersible granule.

[0048] The herbicide of the present invention can be provided in the form of a finished product, i.e., the components have been mixed; or each component can be provided in the form of a separate formulation and directly tank-mixed during use.

[0049] There are no special requirements for the other components and their contents in each dosage form except for the active ingredient, nor for the content of the active ingredient. Conventional ratios in the art can be adopted, for example:

[0050] The emulsifiable concentrate contains 1 - 80 wt% active ingredient, 5 - 25 wt% emulsifier, 0.1 - 2 wt% safener, and the balance is solvent.

[0051] The aqueous suspension concentrate contains 3 - 60 wt% active ingredient, 0.1 - 2 wt% safener, 1 - 10 wt% dispersant, 0.5 - 5 wt% wetting agent, 3 - 15 wt% emulsifier, 0.1 - 10 wt% antifreeze agent, 0 - 10 wt% other additives such as stabilizers, preservatives, thickeners, defoamers, and the balance is water. The suspension concentrate usually needs to be wet-milled to obtain a stable, flowable, and easily measurable volume of suspension liquid.

[0052] The oil-based suspension concentrate contains 3 - 30 wt% active ingredient, 0.1 - 2 wt% safener, 10 - 20 wt% emulsifier, 0 - 10 wt% other additives such as stabilizers, thickeners, and the balance is oil. The suspension concentrate usually needs to be wet-milled to obtain a stable, flowable, and easily measurable volume of suspension liquid.

[0053] The microemulsion contains 1 - 80 wt% active ingredient, 5 - 25 wt% emulsifier, 0.1 - 2 wt% safener, 0.5 - 5 wt% antifreeze agent, 0.5 - 10 wt% cosolvent, 0.5 - 10 wt% other additives such as stabilizers, preservatives, etc., and the balance is water.

[0054] The emulsion in water contains 1 - 70 wt% active ingredient, 0.1 - 2 wt% safener, 10 - 50 wt% solvent, 3 - 20 wt% emulsifier, 2 - 6 wt% antifreeze agent, 0.1 - 1 wt% defoamer, and the balance is water.

[0055] The suspension concentrate of microcapsules contains 5 - 50 wt% active ingredient (wherein, the weight fraction of the free active ingredient accounts for less than 10 wt% of the total weight fraction of the active ingredient), 1 - 10 wt% wall material, 0.1 - 2 wt% safener, 0.5 - 10 wt% dispersant, 0.5 - 5 wt% wetting agent, 3 - 15 wt% emulsifier, 0 - 20 wt% solvent, 0.1 - 5 wt% antifreeze agent, 0 - 10 wt% other additives such as stabilizers, preservatives, thickeners, acid-adjusting medium, alkali-adjusting medium, and the balance is water.

[0056] The microcapsule suspension-suspension agent contains 5-50 wt% of active ingredient (wherein, the weight fraction of the free active ingredient accounts for less than 10 wt% of the weight fraction of the microcapsule active ingredient), 1-10 wt% of wall material, 0.1-2 wt% of safener, 0.5-10 wt% of dispersant, 0.1-5 wt% of wetting agent, 3-15 wt% of emulsifier, 0-20 wt% of solvent, 0.1-5 wt% of antifreeze, 0-10 wt% of other additives such as stabilizer, preservative, thickener, acid-adjusting medium, alkali-adjusting medium, and the balance is water.

[0057] The wettable powder contains 3-80 wt% of active ingredient, 0.1-2 wt% of safener, 0.5-10 wt% of dispersant, 0.5-5 wt% of wetting agent, 0-10 wt% of other additives such as stabilizer, etc., and the balance is solid inert carrier, such as kaolin, etc.

[0058] The water dispersible granule contains 3-50 wt% of active ingredient, 0.1-2 wt% of safener, 0.5-10 wt% of dispersant, 0.5-5 wt% of wetting agent, 0-10 wt% of other additives such as stabilizer, binder, and the balance is solid inert carrier, such as kaolin, etc. The water dispersible granule is usually made into particles with 10-100 mesh of international standard sieve (1676-152 μm), and can be prepared by methods such as spray granulation, extrusion granulation, high-speed rotary granulation, fluidized bed granulation, etc.

[0059] In the present invention, there is no special requirement for the preparation methods of various dosage forms, and various methods known in the art can be adopted, which will not be elaborated here.

[0060] The third aspect of the present invention provides the application of the herbicide described in the second aspect in the treatment of weed damage in wheat fields. For example, the application of the herbicide in controlling at least two kinds of weed damages among Alopecurus aequalis, Sclerochloa dura, Polypogon fugax, Avena fatua, Miscanthus sinensis, Galium aparine, Brassica campestris, Descurainia sophia, Vicia sativa, Lithospermum arvense, Bromus japonicus in wheat fields.

[0061] In some embodiments of the present invention, the weeds targeted by the application are gramineous weeds and broad-leaved weeds.

[0062] In some embodiments of the present invention, the broad-leaved weeds are selected from at least one of Galium aparine, Lithospermum arvense, Euphorbia helioscopia, Capsella bursa-pastoris, and Papaver rhoeas.

[0063] In some embodiments of the present invention, the gramineous weeds are selected from at least one of Avena fatua, Setaria viridis, and Echinochloa crusgalli.

[0064] In some embodiments of the present invention, during drug application, the concentration of the active ingredient is 0.1-0.5 wt%, preferably 0.2 wt%. The herbicide in the present invention can be diluted according to actual needs during actual use, and the diluted herbicide is used for foliar spraying in wheat fields.

[0065] 1. Indoor activity measurement test

[0066] Unless otherwise specified, the ratios (including percentages) mentioned below are all weight ratios.

[0067] Purpose: To determine the herbicidal activity of florasulam, pinoxafil, haloxyfop-butyl and their different mixed compositions against weeds under greenhouse pot conditions, and to evaluate their combined effects, in order to provide a scientific basis for the formulation development of mixed agents and field efficacy trials for pesticide registration.

[0068] Test method: The test was conducted under greenhouse conditions. Different types of weed seeds were sown in flower pots, ensuring that there were 25 seeds in each pot. The seeds were covered with about 1 cm thick mixed sand and fine soil. Water was added from the bottom of the flower pot to keep the soil moist, with a moisture content of 25-35%. The weeds were cultured in a light incubator. When the weeds grew to 5 cm after emerging from the soil, the stems and leaves were sprayed. Each treatment group was repeated 4 times, and the treatment without the drug was set as the control. After treatment, the test materials were placed in the greenhouse for cultivation, and the growth of the target weeds was observed regularly. After 30 days of experimental treatment, the symptoms of damage and growth inhibition of the target crops were visually observed, and the fresh weight of the aboveground parts was measured.

[0069] Test targets: two weeds: Rhizoma Cibotii and Setaria viridis.

[0070] Test agent: The original drug uses cyclohexanone as solvent and is diluted with a 1% emulsifier T-60 aqueous solution, and is diluted immediately before use (the amount used is the amount of active ingredient of the composition applied per acre of land).

[0071] Weed survival rate: Cut the green tissue above ground in each treatment area on day 30, weigh it using an electronic balance, and calculate the actual weed survival rate: E (%) = (fresh weight of weeds in treatment area / fresh weight of weeds in control area) × 100%

[0072] Use the following Colby equation: E0(%) = X x Y x Z x ... x N / 100 (n-1) To evaluate the combined effects of florasulam, pinoxaflor and fluazifop-butyl on Rhizoma Cimicifugae and Setaria viridis in wheat fields.

[0073] Calculation formula: E0(%) = X×Y×Z / 10000.

[0074] X is the weed survival rate of target weeds when component A is used alone; Y is the weed survival rate of target weeds when component B is used alone; Z is the weed survival rate of target weeds when component C is used alone; E0 is the weed survival rate of target when components A, B and C are used in combination, and E is the actual weed survival rate of target when components A, B and C are used alone or in combination. E0-E>10% is a synergistic effect, E0-E<-10% is an antagonistic effect, and E0-E values ​​between ±10% are additive effects.

[0075] Table 1 Joint Action of Florasulam, Pinoxaden and Halauxifen-methyl Combinations against Lithospermum arvense

[0076]

[0077]

[0078] Table 2 Joint Action of Florasulam, Pinoxaden and Halauxifen-methyl Combinations against Setaria viridis

[0079]

[0080]

[0081]

[0082] It can be seen from Table 1 and Table 2 that the results of the joint action determination show that the actual control effects observed for the combinations of florasulam, pinoxaden and halauxifen-methyl are all greater than the expected control effects calculated by the formula. When the weight ratio of florasulam, pinoxaden and halauxifen-methyl is 1:1 - 20:0.5 - 5, the control effect can be improved; when the weight ratio of florasulam, pinoxaden and halauxifen-methyl is more preferably 1:5 - 15:0.5 - 2, the control effect can be further improved, indicating that compared with single formulations and two-component compound formulations, the combination of the three active ingredients has a synergistic effect.

[0083] II. Examples of Herbicidal Compositions and Pharmacodynamic Determinations

[0084] Example 1 10% Florasulam·Pinoxaden·Halauxifen-methyl EC (weight ratio of the three is 1:8:1)

[0085] Florasulam 1 wt%, Pinoxaden 8 wt%, Halauxifen-methyl 1 wt%, Cloquintocet-mexyl 1 wt%, Phenethylphenol Polyoxyethylene Ether 10 wt%, Calcium Dodecylbenzenesulfonate 5 wt%, 20% N-Methylpyrrolidone, Solvent Oil 200 added to 100 wt%.

[0086] Example 2 10% Florasulam·Pinoxaden·Halauxifen-methyl EC (weight ratio of the three is 1:7:2)

[0087] Florasulam 1 wt%, Pinoxaden 7 wt%, Halauxifen-methyl 2 wt%, Cloquintocet-mexyl 1 wt%, Phenethylphenol Polyoxyethylene Ether 10 wt%, Calcium Dodecylbenzenesulfonate 5 wt%, 20% N-Methylpyrrolidone, Solvent Oil 200 added to 100 wt%.

[0088] Example 3: 10% florasulam - pinoxaden - fluroxypyr - meptyl EC (weight ratio of the three is 1:8.5:0.5)

[0089] Florasulam 1 wt%, pinoxaden 8.5 wt%, fluroxypyr - meptyl 0.5 wt%, cloquintocet - mexyl 1 wt%, phenethylphenol polyoxyethylene ether 10 wt%, calcium dodecylbenzenesulfonate 5 wt%, 20% N - methylpyrrolidone, solvent oil 200# added to 100 wt%.

[0090] Example 4: 10% florasulam - pinoxaden - fluroxypyr - meptyl EC (weight ratio of the three is 1:16:3)

[0091] Florasulam 0.5 wt%, pinoxaden 8 wt%, fluroxypyr - meptyl 1.5 wt%, cloquintocet - mexyl 1 wt%, phenethylphenol polyoxyethylene ether 10 wt%, calcium dodecylbenzenesulfonate 5 wt%, 20% N - methylpyrrolidone, solvent oil 200# added to 100 wt%.

[0092] Example 5: 10% florasulam - pinoxaden - fluroxypyr - meptyl EC (weight ratio of the three is 1:19:5)

[0093] Florasulam 0.4 wt%, pinoxaden 7.6 wt%, fluroxypyr - meptyl 2 wt%, cloquintocet - mexyl 1 wt%, phenethylphenol polyoxyethylene ether 10 wt%, calcium dodecylbenzenesulfonate 5 wt%, 20% N - methylpyrrolidone, solvent oil 200# added to 100 wt%.

[0094] Example 6: 10% florasulam - pinoxaden - fluroxypyr - meptyl aqueous suspension concentrate (weight ratio of the three is 1:8:1)

[0095] Florasulam 1 wt%, pinoxaden 8 wt%, fluroxypyr - meptyl 1 wt%, cloquintocet - mexyl 1 wt%, arylphenol polyoxyethylene succinate sulfonate 3 wt%, polycarboxylate 2 wt%, xanthan gum 0.2 wt%, magnesium aluminum silicate 0.5 wt%, silicone defoamer 0.2 wt%, ethylene glycol 5 wt%, sodium benzoate 0.2 wt%, water added to 100 wt%.

[0096] Example 7: 10% florasulam - pinoxaden - fluroxypyr - meptyl wettable powder (weight ratio of the three is 1:8:1)

[0097] Florasulam 1 wt%, pinoxaden 8 wt%, fluroxypyr - meptyl 1 wt%, cloquintocet - mexyl 1 wt%, sodium dodecylbenzenesulfonate 5 wt%, sodium lignosulfonate 8 wt%, silicon dioxide 20 wt%, kaolin added to 100 wt%.

[0098] Example 8 10% Florasulam - Pinoxaden - Halauxifen - methyl Water - dispersible Granules (weight ratio of the three is 1:8:1)

[0099] Florasulam 1wt%, Pinoxaden 8wt%, Halauxifen - methyl 1wt%, Cloquintocet - mexyl 1wt%, Sodium lauryl sulfate 5wt%, Polycarboxylate 8wt%, Silica 20wt%, Starch 10wt%, Diatomaceous earth added to 100wt%.

[0100] Comparative Example 1 10% Florasulam EC

[0101] Florasulam 10wt%, Cloquintocet - mexyl 1wt%, Phenethylphenol polyoxyethylene ether 10wt%, Calcium dodecylbenzenesulfonate 5wt%, N - methylpyrrolidone 20wt%, Solvent oil 200# added to 100wt%.

[0102] Comparative Example 2 10% Pinoxaden EC

[0103] Pinoxaden 10wt%, Cloquintocet - mexyl 1wt%, Phenethylphenol polyoxyethylene ether 10wt%, Calcium dodecylbenzenesulfonate 5wt%, N - methylpyrrolidone 20wt%, Solvent oil 200# added to 100wt%.

[0104] Comparative Example 3 10% Halauxifen - methyl EC

[0105] Halauxifen - methyl 10wt%, Cloquintocet - mexyl 1wt%, Phenethylphenol polyoxyethylene ether 10wt%, Calcium dodecylbenzenesulfonate 5wt%, N - methylpyrrolidone 20wt%, Solvent oil 200# added to 100wt%.

[0106] Comparative Example 4 10% Florasulam - Pinoxaden - Halauxifen - methyl EC (weight ratio of the three is 1:23.75:0.25)

[0107] Florasulam 0.4wt%, Pinoxaden 9.5wt%, Halauxifen - methyl 0.1wt%, Cloquintocet - mexyl 1wt%, Phenethylphenol polyoxyethylene ether 10wt%, Calcium dodecylbenzenesulfonate 5wt%, N - methylpyrrolidone 20wt%, Solvent oil 200# added to 100wt%.

[0108] Comparative Example 5 10% Florasulam - Pinoxaden - Halauxifen - methyl EC (weight ratio of the three is 1:48.9:0.1)

[0109] Florasulam 0.2wt%, Pinoxaden 9.78wt%, Halauxifen - methyl 0.02wt%, Cloquintocet - mexyl 1wt%, Phenethylphenol polyoxyethylene ether 10wt%, Calcium dodecylbenzenesulfonate 5wt%, N - methylpyrrolidone 20wt%, Solvent oil 200# added to 100wt%.

[0110] Comparative Example 6: 10% florasulam - pinoxaden emulsifiable concentrate (weight ratio of the two is 1:10)

[0111] Florasulam 0.9 wt%, pinoxaden 9.1 wt%, cloquintocet - mexyl 1 wt%, phenethylphenol polyoxyethylene ether 10 wt%, calcium dodecylbenzenesulfonate 5 wt%, N - methylpyrrolidone 20 wt%, solvent oil 200# added to 100 wt%.

[0112] Comparative Example 7: 10% florasulam - fluroxypyr - meptyl emulsifiable concentrate (weight ratio of the two is 1:1)

[0113] Florasulam 5 wt%, fluroxypyr - meptyl 5 wt%, cloquintocet - mexyl 1 wt%, phenethylphenol polyoxyethylene ether 10 wt%, calcium dodecylbenzenesulfonate 5 wt%, N - methylpyrrolidone 20 wt%, solvent oil 200# added to 100 wt%.

[0114] Comparative Example 8: 10% pinoxaden - fluroxypyr - meptyl emulsifiable concentrate (weight ratio of the two is 10:1)

[0115] Pinoxaden 9.1 wt%, fluroxypyr - meptyl 0.9 wt%, cloquintocet - mexyl 1 wt%, phenethylphenol polyoxyethylene ether 10 wt%, calcium dodecylbenzenesulfonate 5 wt%, N - methylpyrrolidone 20 wt%, solvent oil 200# added to 100 wt%.

[0116] The compositions and dosage forms of the active ingredients in Examples 1 - 8 and Comparative Examples 1 - 8 are specifically shown in Table 3 as follows:

[0117] Table 3

[0118] Number Content of florasulam Content of pinoxaden Content of fluroxypyr-meptyl Weight ratio Dosage form Example 1 1wt% 8wt% 1wt% 1:8:1 Emulsifiable concentrate Example 2 1wt% 7wt% 2wt% 1:7:2 Emulsifiable concentrate Example 3 1wt% 8.5wt% 0.5wt% 1:8.5:0.5 Emulsifiable concentrate Example 4 0.5wt% 8wt% 1.5wt% 1:16:3 Emulsifiable concentrate Example 5 0.4wt% 7.6wt% 2wt% 1:19:5 Emulsifiable concentrate Example 6 1wt% 8wt% 1wt% 1:8:1 Water suspension concentrate Example 7 1wt% 8wt% 1wt% 1:8:1 Wettable powder Example 8 1wt% 8wt% 1wt% 1:8:1 Water dispersible granules Comparative example 1 10wt% - - - Emulsifiable concentrate Comparative example 2 - 10wt% - - Emulsifiable concentrate Comparative example 3 - - 10wt% - Emulsifiable concentrate Comparative example 4 0.4wt% 9.5wt% 0.1wt% 1:23.75:0.25 Emulsifiable concentrate Comparative example 5 0.2wt% 9.78wt% 0.02wt% 1:48.9:0.1 Emulsifiable concentrate Comparative example 6 0.9wt% 9.1wt% - 1:10 Emulsifiable concentrate Comparative example 7 5wt% - 5wt% 1:1 Emulsifiable concentrate Comparative example 8 - 9.1wt% 0.9wt% 10:1 Emulsifiable concentrate

[0119] Test Example 1: Field efficacy test

[0120] Test site: Zhengzhou City, Henan Province. The soil of the test field is yellow clay, with a heavy texture, pH value of 6.0 - 7.0, slightly acidic, medium - upper management level, medium soil fertility, and the wheat fields in each treatment area after planting are managed according to conventional production.

[0121] The medicaments of Examples 1 - 8 and Comparative Examples 1 - 8 were respectively used to spray - treat the wheat fields, and a blank control group (i.e., without spraying the wheat fields) was set. The dilution factor of each preparation was 500 times. Since the total content of the active ingredients in the preparations was the same, the doses of each group were the same. Uniform spraying was carried out before emergence after sowing.

[0122] The control effects were investigated 10 days, 20 days, and 30 days after pesticide application. The specific test method was carried out in accordance with the "Guidelines for Field Efficacy Trials of Pesticides". Five random sampling points were used in each treatment area to investigate the control effects of Galium aparine and Echinochloa crusgalli in each treatment area. At 10 days, 20 days, and 30 days after pesticide application, the weeds were identified and counted, and the plant control efficacy was calculated according to formula (A). The specific results are shown in Table 2:

[0123]

[0124] Table 4

[0125]

[0126]

[0127] Field Efficacy Test of Test Example 2

[0128] Test site: Jiamusi City, Heilongjiang Province. The terrain of this plot is flat and the fertility is good. The wheat fields in each treatment area after pesticide application were managed according to conventional production.

[0129] The wheat fields were sprayed with the medicaments of Examples 1-8 and Comparative Examples 1-8 respectively, and a blank control group (i.e., the wheat fields were not sprayed) was set. The dilution multiple of each preparation was 500 times, and the total content of the active ingredients of the preparations was the same, and the doses of each group were the same. The above-mentioned diluted medicaments were evenly sprayed before emergence after sowing respectively.

[0130] The control effects were investigated 10 days, 20 days, and 30 days after pesticide application. The specific test method was carried out in accordance with the "Guidelines for Field Efficacy Trials of Pesticides". Five random sampling points were used in each treatment area to investigate the control effects of Lithospermum arvense and Avena fatua in each treatment area. At 10 days, 20 days, and 30 days after pesticide application, the weeds were identified and counted, and the plant control efficacy was calculated according to formula (A) in the same way. The specific results are shown in Table 3.

[0131] Table 5

[0132]

[0133]

[0134] It can be seen from Tables 4-5 that by comparing Examples 1-5 with Comparative Examples 1-3 respectively, it can be seen that the herbicide of the present invention has better control effects and a synergistic effect compared with the single-component florasulam, pinoxaden, and fluroxypyr-meptyl. The herbicide of the present invention can control various different types of weed damage occurring in combination.

[0135] Comparing Examples 1-5 with Comparative Examples 6-8 respectively, it can be seen that the herbicide of the present invention has better control effect and synergistic effect compared with the binary components of florasulam and pinoxaden, florasulam and fluroxypyr-meptyl, pinoxaden and fluroxypyr-meptyl. The herbicide of the present invention can control various different types of weed damage occurring in mixture.

[0136] Comparing Example 1 with Examples 6-8 respectively, it can be seen that the emulsifiable concentrate formulation of florasulam, pinoxaden and fluroxypyr-meptyl has better pesticidal effect than other formulations and is more preferred.

[0137] Comparing Examples 1-3, Examples 4-5 and Comparative Examples 4-5, it can be seen that when the weight ratio of florasulam, pinoxaden and fluroxypyr-meptyl is 1:1-20:0.5-5, the control effect can be improved; when the weight ratio of florasulam, pinoxaden and fluroxypyr-meptyl is more preferably 1:5-15:0.5-2, the control effect can be further improved; when the weight ratio of florasulam, pinoxaden and fluroxypyr-meptyl is 1:8:1, the control effect is the best.

[0138] The pesticide composition of the present invention has a synergistic effect compared with the single components of florasulam, pinoxaden and fluroxypyr-meptyl; the binary components of florasulam and pinoxaden, florasulam and fluroxypyr-meptyl, pinoxaden and fluroxypyr-meptyl, can improve the control effect; it can control various different types of weed damage occurring in mixture, thereby reducing the dosage of pesticides, saving costs and reducing environmental pollution.

[0139] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited thereto. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solutions of the present invention, including any other suitable combination of each technical feature. These simple modifications and combinations should also be regarded as the content disclosed by the present invention and fall within the protection scope of the present invention.

Claims

1. A herbicidal composition, characterized in that The active ingredients of the herbicidal composition include florasulam, pinoxaden and haloxyfop-butyl.

2. The herbicidal composition according to claim 1, wherein In the herbicidal composition, the weight ratio of florasulam, pinoxaden and haloxyfop-butyl is 1:1-20:0.5-5.

3. The herbicidal composition according to claim 1 or 2, wherein In the herbicidal composition, the weight ratio of florasulam, pinoxaden and halosulfuron-butyl is 1:5-15:0.5-2, preferably 1:8:

1.

4. The herbicidal composition according to claim 1 or 2, wherein In the herbicidal composition, the weight ratio of florasulam, pinoxaden and halosulfuron-butyl is 1:2.5-20:1-4, preferably 1:10:

1.

5. The herbicidal composition according to any one of claims 1 to 4, wherein The herbicidal composition further comprises an adjuvant which is acceptable on pesticides; Preferably, the auxiliary material is selected from at least one of an emulsifier, a solvent, a cosolvent, a dispersant, a wetting agent, an antifreeze agent, a preservative, a thickener, a defoamer, a safener, an acid-base regulating medium and a solid inert carrier; Preferably, the emulsifier is selected from at least one of phenylethylphenol polyoxyethylene ether, polyol fatty acid ester, polyvinyl alcohol and diphenylethylphenol polyoxyethylene ether; Preferably, the solvent and the co-solvent are independently selected from at least one of xylene, cyclohexanone, dimethylformyl, dimethylacetamide, solvent oil and dichloromethane; Preferably, the dispersant is selected from at least one of polycarboxylates, arylphenol polyoxyethylene succinate sulfonates and sodium lignin sulfonate; Preferably, the wetting agent is selected from at least one of sodium dodecylbenzene sulfonate, sodium dodecyl sulfate and sodium lauryl sulfate; Preferably, the antifreeze agent is selected from at least one of ethylene glycol, propylene glycol and glycerol; Preferably, the preservative is sodium benzoate and / or kason; Preferably, the thickener is magnesium aluminum silicate and / or xanthan gum; Preferably, the defoamer is a silicone defoamer; Preferably, the safener is selected from cloquintocet-mexyl; Preferably, the acid-base regulating medium is selected from at least one of phosphoric acid, hydrochloric acid, citric acid, triethanolamine and sodium hydroxide; Preferably, the solid inert carrier is selected from at least one of silicon dioxide, diatomaceous earth and kaolin.

6. The herbicidal composition according to any one of claims 1 to 5, wherein Based on the total weight of the herbicidal composition, the content of the active ingredient is 1-80 wt %, preferably 1-40 wt %, further preferably 2-20 wt %, and most preferably 10 wt %.

7. A herbicide prepared using the herbicidal composition according to any one of claims 1 to 6.

8. The herbicide according to claim 7, wherein The herbicide is in the form of emulsifiable concentrate, water suspension, oil suspension, microemulsion, water emulsion, microcapsule suspension, microcapsule suspension-suspension, wettable powder or water dispersible granule.

9. Use of the herbicide according to claim 8 in treating weeds in wheat fields.

10. The use according to claim 9, wherein: The weeds targeted by the application are grass weeds and broadleaf weeds; Preferably, the broadleaf weeds are selected from at least one of: Glechoma longituba, Rhizoma Atractylodis Macrocephalae ... Shepherd's Purse and Papaver rhoeas; Preferably, the grass weeds are selected from at least one of wild oats, foxtail grass and barnyard grass; Preferably, when administered, the concentration of the active ingredient is 0.1-0.5 wt%, preferably 0.2 wt%.

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