Weeding composition and application thereof

Abstract

The invention discloses a weeding composition and application thereof, the effective components of the weeding composition comprise an active component A, an active component B and an active component C. The active component A is florasulam, the active component B is halauxifen-methyl, and the active component C is fluroxypyr or an ester compound thereof. The weeding composition can be used for preventing and removing various weeds in wheat fields, is high in weeding activity, has an obvious synergistic effect, can reduce use components, is high in safety to crops, and can effectively reduce the risk of weed resistance.

Description

Technical Field

[0001] This invention belongs to the field of herbicides, specifically relating to a herbicidal composition and its application. Technical Background

[0002] Chemical weeding is the most economical and effective means of controlling weeds in farmland. However, long-term, continuous, and high-dose use of a single type or a single mechanism of action of chemical herbicide can easily lead to problems such as herbicide resistance and the evolution of resistance in weeds.

[0003] Biflusulfonamide belongs to the triazolidinesulfonamide class of herbicides and is mainly used to control broadleaf weeds in wheat fields. However, its efficacy against some weeds is generally poor, and its effect is slow and incomplete when used alone. Fluroxypyridine is a new type of hormone-based herbicide that mimics the effects of high doses of natural plant growth hormones. It works by interfering with multiple growth processes of sensitive plants, but its effect on grass weeds is not good. Clopyroxyacetic acid or its ester compounds are systemic post-emergence foliar herbicides. Their dosage varies greatly, and their safety to crops is poor.

[0004] The rational combination or mixing of herbicides has advantages such as broadening the weed spectrum, improving control efficacy, and delaying the occurrence and development of herbicide resistance in weeds, making it one of the most effective methods to solve the aforementioned problems. Regarding the solution of combining herbicides with different mechanisms of action to alleviate weed resistance, CN116897942A discloses a herbicidal composition containing diflubenzuron and fluchloropyridine ester, comprising the active ingredients diflubenzuron, fluchloropyridine ester, and MCPA and their pesticide-acceptable salts or esters. This composition can be used in wheat fields, showing significant control effects on various broadleaf weeds, grasses, and sedges. However, this patent still has drawbacks, including high dosage requirements, insufficient usage costs, and risks of environmental pollution. CN105994290A discloses a herbicidal composition containing cycloflufenoxam and aryl carboxylic acid compounds, including the active ingredient cycloflufenoxam and one or more of clopyralid, isooctyl clopyralid, fluopyridine ester, triclopyralid, dichloropyridine acid, aminopyridine acid, and dicamba. This composition effectively controls annual grasses and broadleaf weeds in wheat fields and addresses the problem of resistant and multi-resistant weeds. However, this patent still requires optimization of the formulation and application method of the compound herbicidal composition.

[0005] Currently, there are no reports on the combined herbicidal effects of sulfadiazine, fluopyridine ester, and clopyralid or their esters. This study determined the combined herbicidal effects of sulfadiazine, fluopyridine ester, and clopyralid or their esters on weeds in wheat fields through laboratory testing, screened appropriate compound ratios, and conducted corresponding field efficacy trials. The results showed that each compound, within a certain ratio range, had a synergistic effect on weed control in wheat fields, could reduce the amount of active ingredients used, had high crop safety, and could effectively reduce the risk of weed resistance. Summary of the Invention

[0006] Based on the above, the purpose of this invention is to provide a herbicidal composition; another purpose of this invention is to provide an application of the herbicidal composition for controlling weeds in wheat fields.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a herbicidal composition, wherein the active ingredients of the herbicidal composition include active ingredient A, active ingredient B and active ingredient C, wherein active ingredient A is diflubenzuron, active ingredient B is fluroxypyr ester, and active ingredient C is clopyralid or its ester compound.

[0008] Furthermore, the clopyralid ester compounds are isooctyl clopyralid, butoxyisopropyl clopyralid, or methyl clopyralid.

[0009] Furthermore, the clopyralid ester compound is isooctyl clopyralid or clopyralid butoxyisopropyl clopyralid;

[0010] Furthermore, the mass ratio of active ingredient A, active ingredient B, and active ingredient C in the herbicidal composition is 0.5–20:0.5–25:5–200;

[0011] Furthermore, the mass ratio of active ingredient A, active ingredient B, and active ingredient C in the herbicidal composition is 1-10:1-20:5-100;

[0012] Furthermore, the mass ratio of active ingredient A, active ingredient B, and active ingredient C in the herbicidal composition is 1-4:2-10:12-48;

[0013] Further, the mass ratio of active ingredient A, active ingredient B, and active ingredient C in the herbicidal composition is 1:2:12, 1:2:24, 1:2:48, 1:6:12, 1:6:24, 1:6:48, 1:10:12, 1:10:24, 1:10:48, 2.5:2:12, 2.5:2:24, 2.5:2:48, 2.5:6:12, 2.5:6:24, 2.5:6:48, 2.5:10:12, 2.5:10:24, 2.5:10:48, 4:2:12, 4:2:24, 4:2:48, 4:6:12, 4:6:24, 4:6:48, 4:10:12, 4:10:24, 4:10:48;

[0014] Further, the mass ratio of active ingredient A, active ingredient B, and active ingredient C in the herbicidal composition is 1:2:12, 1:2:24, 1:6:12, 1:6:24, 1:6:48, 1:10:12, 1:10:24, 1:10:48, 2.5:2:12, 2.5:2:24, 2.5:2:48, 2.5:6:12, 2.5:6:24, 2.5:6:48, 2.5:10:12, 2.5:10:24, 2.5:10:48, 4:2:12, 4:2:24, 4:2:48, 4:6:12, 4:6:24, 4:6:48, 4:10:24, 4:10:48;

[0015] Furthermore, the active ingredients A, B, and C in the herbicidal composition have a mass percentage content of 0.5% to 90% in the herbicidal composition;

[0016] Furthermore, the active ingredients A, B, and C in the herbicidal composition have a mass percentage content of 5-85% in the herbicidal composition;

[0017] Furthermore, the herbicidal composition, in addition to the active ingredient, also includes agriculturally acceptable auxiliary ingredients, which are selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoamers, solvents, preservatives, stabilizers, synergists, or carriers.

[0018] Further, the wetting agent is selected from one or more of alkylbenzene sulfonates, alkylnaphthalene sulfonates, lignin sulfonates, sodium dodecyl sulfate, sodium dioctyl succinate sulfonate, α-olefin sulfonates, alkylphenol polyoxyethylene ethers, castor oil polyoxyethylene ethers, alkylphenol ethoxylates, fatty alcohol ethoxylates, sodium fatty alcohol polyoxyethylene ether sulfate, silkworm excrement, soapberry powder, soapberry powder, SOPA, detergents, emulsifiers 2000 series, and wetting and penetrating agents F; and / or

[0019] Further, the dispersant is selected from one or more of the following: lignin sulfonate, alkyl naphthalene sulfonate formaldehyde condensate, naphthalene sulfonate, tristyrylphenol ethoxylate phosphate, fatty alcohol ethoxylate, alkylphenol polyoxyethylene ether, alkylphenol polyoxyethylene ether methyl ether condensate sulfate, fatty amine polyoxyethylene ether, glycerol fatty acid ester polyoxyethylene ether, polycarboxylates, polyacrylic acids, phosphates, EO-PO block copolymers, and EO-PO graft copolymers; and / or

[0020] Further, the emulsifier is selected from one or more of the following: calcium dodecylbenzenesulfonate, alkylphenol formaldehyde resin polyoxyethylene ether, phenethylphenol polyoxyethylene polyoxypropylene ether, fatty alcohol ethylene oxide-propylene oxide copolymer, styrene-phenol polyoxyethylene ether, castor oil polyoxyethylene ether, and alkylphenol ether phosphate; and / or

[0021] Furthermore, the thickener is selected from one or more of xanthan gum, organobentonite, gum arabic, sodium alginate, magnesium aluminum silicate, carboxymethyl cellulose, and silica; and / or

[0022] Further, the disintegrant is selected from one or more of sodium sulfate, ammonium sulfate, aluminum chloride, sodium chloride, ammonium chloride, bentonite, glucose, sucrose, starch, cellulose, urea, sodium carbonate, sodium bicarbonate, citric acid, and tartaric acid; and / or

[0023] Furthermore, the antifreeze is selected from one or more of alcohols, alcohol ethers, chlorinated hydrocarbons, and inorganic salts; and / or

[0024] Furthermore, the defoamer is selected from C 10 -C 20 Saturated fatty acid compounds, silicone oil, silicone compounds, C8-C 10 One or more of the fatty alcohols; and / or

[0025] Further, the solvent is selected from one or more of benzene, toluene, xylene, mesitylene, methanol, ethanol, isopropanol, n-butanol, dimethyl sulfoxide, dimethylformamide, cyclohexanone, hydrocarbon carbonates, diesel oil, solvent oil, vegetable oil, vegetable oil derivatives, and water; and / or

[0026] Further, the preservative is selected from one or more of propionic acid, sodium propionate, sorbic acid, sodium sorbate, potassium sorbate, benzoic acid, sodium benzoate, sodium p-hydroxybenzoate, methyl p-hydroxybenzoate, Kathon, and 1,2-benzisothiazolin-3-one; and / or

[0027] Further, the stabilizer is selected from one or more of the following: disodium hydrogen phosphate, oxalic acid, succinic acid, adipic acid, borax, 2,6-di-tert-butyl-p-cresol, triethanolamine oleate, epoxidized vegetable oil, kaolin, bentonite, attapulgite, silica, talc, montmorillonite, and starch; and / or

[0028] Furthermore, the synergist is selected from synergistic phosphorus, synergistic ether; and / or

[0029] Furthermore, the carrier is selected from one or more of the following: ammonium salts, ground natural minerals, ground artificial minerals, silicates, resins, waxes, solid fertilizers, water, organic solvents, mineral oils, vegetable oils, and vegetable oil derivatives.

[0030] Furthermore, the herbicidal composition can be prepared into an agriculturally permissible formulation.

[0031] Furthermore, the dosage form is an emulsifiable concentrate, a suspension concentrate, a microemulsion, a dispersible oil suspension, a suspension emulsion, or a wettable powder;

[0032] Application of a herbicidal composition in controlling weeds in wheat fields;

[0033] Furthermore, the wheat field weeds mentioned are one or more of the following: wild oats, wild oats, wild oats, cleavers, shepherd's purse, field bindweed, amaranth, purslane, thistle, duckweed, chickweed, and wild rapeseed;

[0034] A weed control composition is used on unwanted plant growth sites and / or leaves and / or stems.

[0035] The herbicide composition of the present invention has the following advantages:

[0036] 1) The herbicide combination of the present invention can effectively alleviate the occurrence and development of herbicide resistance in weeds and delay the emergence of herbicide resistance in weeds;

[0037] 2) The herbicide combination of the present invention has a good control effect on annual broadleaf weeds in wheat fields, with a wider spectrum of weed control and a longer residual effect.

[0038] 3) The herbicide composition of the present invention, under a certain mass ratio, can exert a synergistic effect of the three active ingredients, improve the weeding effect, reduce the dosage, reduce environmental pollution, and ensure the safety of wheat. Detailed Implementation Plan

[0039] To better illustrate the present invention, the following description, in conjunction with embodiments, further explains the content of the present invention.

[0040] Preparation Example 1

[0041] 40% diflubenzuron·fluopyridine ester·clopyralid isooctyl ester water-dispersible granules (1.8% + 1.2% + 37%)

[0042] Formula composition: 1.8% diflubenzuron, 1.2% fluopyridine ester, 37% isooctyl chlorpyrifos, 6% polycarboxylate GY-D06, 4% sodium dodecyl sulfate, 1.5% sodium alkyl sulfonate, 3% silica, and clay to make up the balance;

[0043] Preparation method: According to the formula ratio, the active ingredients are added to the carrier, and surfactants and other functional additives are added to it. After mixing, the mixture is pulverized by air jet and then an appropriate amount of water is added. The mixture is then kneaded, granulated, dried and sieved to obtain the water-dispersible granule product.

[0044] Preparation Example 2

[0045] 38% diflubenzuron·fluopyridine ester·clopyralid oxyacetate butoxyisopropyl ester water-dispersible granules (1.5% + 1.5% + 35%)

[0046] Formula composition: 1.5% diflubenzuron, 1.5% fluopyridine ester, 35% clopyralid butoxyisopropyl ester, 6% polycarboxylate GY-D06, 4% sodium dodecyl sulfate, 2% sodium alkyl sulfonate, 3.5% silica, and clay to make up the balance;

[0047] Preparation method: Same as in preparation example 1.

[0048] Preparation Example 3

[0049] 30% diflubenzuron·fluopyridine ester·clopyralid isooctyl ester suspension emulsion (1.2% + 1.8% + 27%)

[0050] Formula composition: 1.2% diflubenzuron, 1.8% fluopyridine ester, 27% isooctyl chlorpyrifos, 20% 200# solvent oil, 3% phosphate ester, 2% naphthalene sulfonate formaldehyde condensate, 5% ethylene glycol, 0.2% xanthan gum, 0.5% silicone defoamer, deionized water to make up the difference;

[0051] Preparation method: According to the formula ratio, first mix the active ingredient clopyralid isooctyl ester with 200# solvent oil until completely dissolved to prepare the oil phase for later use; place the remaining active ingredients, surfactants and other functional additives into the reaction vessel in sequence, add oil and mix evenly, and then perform high-speed shearing and wet sand milling until the particle size is less than 5μm to prepare the aqueous phase. Finally, thoroughly mix the oil phase and the aqueous phase, shear, and homogenize and filter to obtain the product.

[0052] Preparation Example 4

[0053] 20% diflubenzuron·fluopyridine ester·clopyralid butoxyisopropyl ester suspension emulsion (1% + 2% + 15%)

[0054] Formula composition: 1% diflubenzuron, 2% fluopyridine ester, 15% clopyralid butoxyisopropyl ester, 18% 200# solvent oil, 3% phosphate ester, 2.5% naphthalene sulfonate formaldehyde condensate, 5% ethylene glycol, 0.25% xanthan gum, 0.5% silicone defoamer, deionized water to make up the difference;

[0055] Preparation method: Same as in preparation example 3.

[0056] Preparation Example 5

[0057] 13.5% Diflubenzuron·Fluoropyroxypyr·Isooctyl Chloride Dispersible Oil Suspension (0.5% + 1% + 12%)

[0058] Formula composition: 0.5% diflubenzuron, 1% fluopyridine ester, 12% isooctyl chlorpyrifos, 3% calcium dodecylbenzenesulfonate, 3% polycarboxylate, 15% fatty alcohol polyoxyethylene ether, 1.5% organobentonite, 1.5% fumed silica, methyl oleate to make up the balance;

[0059] Preparation method: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reaction vessel in sequence, mixed with oil until uniform, and then sheared at high speed and milled until the particle size is less than 5μm. Finally, the dispersible oil suspension is obtained by homogenization and filtration.

[0060] Preparation Example 6

[0061] 24% Diflubenzuron·Fluoropyroxypyr·Cloroxypyroxyacetic acid butoxyisopropyl ester dispersible oil suspension (1.5% + 2.5% + 24%)

[0062] Formula composition: 1.6% diflubenzuron, 2.4% fluopyridine ester, 20% clopyroxyacetic acid butoxyisopropyl ester, 3% calcium dodecylbenzenesulfonate, 3% polycarboxylate, 15% fatty alcohol polyoxyethylene ether, 1.5% organobentonite, 1.5% fumed silica, methyl oleate to make up the balance;

[0063] Preparation method: Same as in preparation example 5.

[0064] Preparation Example 7

[0065] 22% diflubenzuron·fluopyridine·clopyralid isooctyl ester EC (0.5% + 1.5% + 20%)

[0066] Formula composition: 0.5% diflubenzuron, 1.5% fluopyridine ester, 20% isooctyl chlorpyrifos, 10% acetophenone, 10% cyclohexanone, 20% 200# solvent oil, 4% calcium dodecylbenzenesulfonate, 12% glycerol fatty acid ester polyoxyethylene ether, methyl oleate to make up the balance.

[0067] Preparation method: The active ingredients are added to the carrier according to the formulation ratio of the example, and surfactants and other functional additives are added thereto. The mixture is stirred and mixed evenly in a stirred mixing tank to obtain the emulsifiable oil.

[0068] Preparation Example 8

[0069] 26% diflubenzuron·fluopyridine ester·clopyralid oxyacetate emulsifiable concentrate (0.5% + 1.5% + 24%)

[0070] Formula composition: 0.5% diflubenzuron, 1.5% fluopyridine ester, 24% clopyralid butoxyisopropyl ester, 10% acetophenone, 10% cyclohexanone, 18.5% 200# solvent oil, 4% calcium dodecylbenzenesulfonate, 12% glycerol fatty acid ester polyoxyethylene ether, methyl oleate to make up the balance;

[0071] Preparation method: Same as in preparation example 7.

[0072] Preparation Example 9

[0073] 12% diflubenzuron·fluopyridine ester·clopyralid isooctyl ester water-in-oil emulsion (0.5% + 1.5% + 10%)

[0074] Formula composition: 0.5% diflubenzuron, 1.5% fluopyridine ester, 10% isooctyl chlorpyrifos, 5% acetophenone, 10% cyclohexanone, 10% sorbitan oleate polyoxyethylene ether, 1% fatty alcohol polyoxyethylene ether sulfate, 0.25% xanthan gum, 5% ethylene glycol, 0.1% sodium benzoate, 0.5% silicone oil, deionized water to make up the balance;

[0075] Preparation method: Dissolve the active ingredients in the solvent according to the formula ratio, add emulsifier to form a homogeneous oil phase, mix deionized water and antifreeze together to form a homogeneous aqueous phase; add the oil phase to the aqueous phase under high-speed shearing, and finally add thickener, preservative and defoamer to form a well-dispersed water emulsion product.

[0076] Preparation Example 10

[0077] 29% Diflubenzuron·Fluoropyroxypyr·Isooctyl Chloride Wettable Powder (4%+5%+20%)

[0078] Formula composition: 4% diflubenzuron, 5% fluopyridine ester, 20% isooctyl chlorpyrifos, 2% sodium dodecyl sulfate, 4% sodium lignosulfonate, 6% naphthalene sulfonate, 10% kaolin, 10% silica, and organic bentonite to make up the balance;

[0079] Preparation method: According to the formula ratio, the active ingredients, dispersant, wetting agent and filler are mixed and stirred evenly in a mixing tank. The mixture is then pulverized and mixed evenly multiple times by an air jet mill to prepare a wettable powder.

[0080] All the above-mentioned test raw materials were provided by the Group's R&D Center.

[0081] Indoor activity test

[0082] Experimental method: potted plant method

[0083] Experimental targets: Artemisia annua, Stellaria media, Galium argentea, and Capsella bursa-pastoris.

[0084] Preparation of the solution: The technical grade pesticides of diflubenzuron, fluroxypyr, isooctyl clopyralid, and clopyralid butoxyisopropyl clopyralid are dissolved in a small amount of acetone. Before use, they are diluted with 0.1% Tween-80 aqueous solution to the required concentration. A 0.1% Tween-80 aqueous solution is used as a blank control.

[0085] Experimental treatments: The effective component content of diflubenzuron was 1, 2.5, and 4 g.ai / hm. 2 The effective ingredient content of the fluorochloropyridine ester treatment was 2, 6, and 10 g.ai / hm. 2 The effective ingredient contents of clopyralid isooctyl ester and clopyralid butyloxyisopropyl ester were 12, 24, and 48 g.ai / hm, respectively. 2 ; and 3 kinds of drugs were combined, and each treatment was repeated 4 times.

[0086] Weed cultivation: Greenhouse pot cultivation method. Select plump weed seeds for the test and place them in a 25℃ light incubator to germinate. After the seeds show white sprouts, sow 20 weed seeds into 9cm disposable paper cups and cultivate them in a light incubator. Leave 15 weeds in each paper cup. On the second day after thinning, spray the seedlings using a tracked crop sprayer.

[0087] After treatment, the plants continued to be cultivated in the greenhouse. The weed control effect of each treatment was observed regularly. 14 days after application, the fresh weight of the above-ground part of the surviving weeds was weighed and the actual fresh weight control effect was calculated.

[0088] The calculation formula is as follows:

[0089] Fresh weight control efficacy E = (fresh weight of control area - fresh weight of treatment area) × 100 / fresh weight of control area

[0090] The theoretical efficacy of the mixed formulation E0 = 100 - (100 - A)(100 - B)(100 - C) / 10000

[0091] In the formula:

[0092] A represents the efficacy of herbicide I at a dosage of P;

[0093] B indicates the efficacy of herbicide II at a dosage of Q;

[0094] C indicates the efficacy of herbicide III at a dosage of R;

[0095] E0 represents the theoretical fresh weight control efficacy when the dosage of the mixture (Ⅰ+Ⅱ+Ⅲ) is (P+Q+R);

[0096] E represents the actual freshness control efficacy of each treatment.

[0097] Evaluation criteria for the combined effects of mixed drugs:

[0098] E-E0 > 10% indicates a synergistic effect, E-E0 < -10% indicates an antagonistic effect, and E-E0 between ±10% indicates an additive effect.

[0099] The experimental results are shown in the following tables:

[0100] Table 1. Combined effects of a mixture of diflubenzuron, fluroxypyr, and isooctyl clopyralid on *Hedysarum mongolicum*.

[0101]

[0102] Table 2. Combined effects of a mixture of diflubenzuron, fluroxypyr, and isooctyl clopyralid with *Stellaria media*.

[0103]

[0104]

[0105] Table 3. Combined effects of diflubenzuron, fluroxypyr, and clopyralid-butoxyisopropyl ester on cleavers.

[0106]

[0107]

[0108] Table 4. Combined effects of diflubenzuron, fluroxypyr, and clopyralid-butoxyisopropyl ester on shepherd's purse.

[0109]

[0110]

[0111] Indoor activity studies showed that the mixtures of diflubenzuron, fluroxypyr, isooctyl chlorpyrifos, and butyloxyisopropyl chlorpyrifos exhibited good indoor activity against wheat field weeds such as shepherd's purse, chickweed, cleavers, and shepherd's purse.

[0112] The results in Table 1 show the following mixing ratios for diflubenzuron, fluroxypyr, and isooctyl chlorpyrifos: 1+2+12, 1+2+24, 1+2+48, 1+6+12, 1+6+24, 1+6+48, 1+10+12, 1+10+24, 1+10+48, 2.5+2+12, 2.5+2+24, 2.5+2+48, 2.5+ The following formulas have a synergistic effect on the control efficacy of *Desmodium styracifolium*: 6+12, 2.5+6+24, 2.5+6+48, 2.5+10+12, 2.5+10+24, 2.5+10+48, 4+2+12, 4+2+24, 4+2+48, 4+6+12, 4+6+24, 4+6+48, 4+10+12, 4+10+24, and 4+10+48.

[0113] The results in Table 2 show that the mixing ratios of diflubenzuron, fluroxypyr, and isooctyl chlorpyrifos are 1+2+12, 1+2+24, 1+2+48, 1+6+12, 1+6+24, 1+6+48, 1+10+12, 1+10+24, 1+10+48, 2.5+2+12, 2.5+2+24, and 2.5+2+48. The following formulas have a synergistic effect on the prevention of chickweed in cattle: 2.5+6+12, 2.5+6+24, 2.5+6+48, 2.5+10+12, 2.5+10+24, 2.5+10+48, 4+2+12, 4+2+24, 4+2+48, 4+6+12, 4+6+24, 4+6+48, 4+10+24, and 4+10+48.

[0114] Table 3 shows that the optimal mixing ratio of diflubenzuron, fluroxypyr, and clopyralid butyloxyisopropyl ester is 1+2+12.

[0115] The formulas 1+2+24, 1+6+12, 1+6+24, 1+6+48, 1+10+12, 1+10+24, 1+10+48, 2.5+2+12, 2.5+2+24, 2.5+2+48, 2.5+6+12, 2.5+6+24, 2.5+6+48, 2.5+10+12, 2.5+10+24, 2.5+10+48, 4+2+12, 4+2+24, 4+2+48, 4+6+12, 4+6+24, 4+6+48, 4+10+24, and 4+10+48 have a synergistic effect on the prevention and control of cleavers.

[0116] Table 4 shows the results: the mixing ratio of diflubenzuron, fluroxypyr, and clopyralid butyloxyisopropyl ester is 1+2+12.

[0117] The formulas 1+2+24, 1+6+12, 1+6+24, 1+6+48, 1+10+12, 1+10+24, 1+10+48, 2.5+2+12, 2.5+2+24, 2.5+2+48, 2.5+6+12, 2.5+6+24, 2.5+6+48, 2.5+10+12, 2.5+10+24, 2.5+10+48, 4+2+12, 4+2+24, 4+2+48, 4+6+12, 4+6+24, 4+6+48, 4+10+12, 4+10+24, and 4+10+48 have a synergistic effect on the prevention and control of shepherd's purse.

[0118] Field efficacy trials:

[0119] The experiment was conducted in accordance with the "Guidelines for Field Efficacy Tests of Pesticides" (GB / T17980.42-2004).

[0120] Experiment location: Pingdu wheat-growing area, Qingdao City, Shandong Province;

[0121] Experimental field: Wheat (Yannong 19), with identical cultivation conditions in all experimental plots. Wheat was machine-sown in rows, with a seed rate of 400 kg / hm². 2 ;

[0122] Target weeds: Annual or perennial weeds in wheat fields;

[0123] The main weeds in wheat fields are: cleavers, chickweed, shepherd's purse, wild wheatgrass, sorrel leaves, and field bindweed;

[0124] Experimental design: The experimental plots were arranged in a randomized block design, with a blank control included. Each plot had an area of ​​30 m². 2 Each treatment was repeated 4 times.

[0125] Test reagents:

[0126] Table 5. Different test reagents and dosages

[0127]

[0128] Application method: The herbicide was applied once during the experiment, as a foliar spray, when the weeds were at the 3-4 leaf stage. A backpack sprayer with a fan-shaped nozzle was used.

[0129] Survey Methods: The absolute value survey method was used. Four sampling points were randomly selected for each treatment at 20 and 40 days after drug administration, with each sampling point being 0.25 m. 2 The efficacy of the control was investigated; the fresh weight was also investigated 40 days after the treatment.

[0130] Calculation method:

[0131] Control efficacy per plant (fresh weight) = [(Number of weeds in the control area (fresh weight) - Number of weeds in the treatment area after treatment (fresh weight) / Number of weeds in the control area (fresh weight))] × 100%

[0132] Experimental results:

[0133] As can be seen from Table 6, the formulations of bisflusulfonamide, fluroxypyridine ester, and mixtures of isooctyl chlorpyrifos or chlorpyrifos butoxyisopropyl ester all have good control effects on conventional weeds in wheat fields, and the control efficacy is significantly higher than that of the control agents.

[0134] Twenty days after application, the following emulsifiable concentrates (22% diflubenzuron·fluopyridine·clopyroxyacetate isooctyl ester EC (0.5%+1.5%+20%), 26% diflubenzuron·fluopyridine·clopyroxyacetate butoxyisopropyl ester EC (0.5%+1.5%+24%), and 13.5% diflubenzuron·fluopyridine·clopyroxyacetate isooctyl ester dispersible oil suspension (0.5%+1%+12%) all showed a control efficacy of over 85% against weeds in wheat fields, demonstrating good rapid-acting properties.

[0135] Forty days after application, the following emulsifiable concentrates (0.5% + 1.5% + 20%), 26% emulsifiable concentrates (0.5% + 1.5% + 24%), and 13.5% oil-dispersible suspension concentrates (0.5% + 1% + 12%) all showed greater than 90% plant control efficacy against weeds in wheat fields, with fresh weight control efficiencies of 93.05%, 94.75%, and 94.53%, respectively, demonstrating good residual efficacy.

[0136] Table 6 Results of field efficacy trials

[0137]

[0138] Note: The above efficacy (%) is the average of each replicate; lowercase letters indicate significant differences at the 5% level.

[0139] Table 7 shows that the wheat yields treated with 22% diflubenzuron·fluopyridine ester·clopyralid isooctyl ester EC (0.5%+1.5%+20%), 26% diflubenzuron·fluopyridine ester·clopyralid isooctyl ester EC (0.5%+1.5%+24%), and 13.5% diflubenzuron·fluopyridine ester·clopyralid isooctyl ester SC (0.5%+1%+12%) were 7024 kg / hm², respectively. 2 6911 kg / hm 2 6975kg / hm 2Compared with the water control, the yield increases were 12.37%, 10.56%, and 11.58%, respectively, indicating that the combination of diflubenzuron, fluroxypyr ester, and chlorfluazuron or their ester compounds had a better yield-increasing effect on wheat than the control.

[0140] Table 7. Effects of different treatments on wheat yield and yield increase rate

[0141]

[0142] Note: Lowercase letters indicate significant differences at the 5% level.

[0143] Safety Investigation: During the trial, observations were conducted at 20 and 40 days post-application. All tested herbicides were found to be safe for wheat growth, with no phytotoxicity observed and no adverse effects on beneficial organisms. This indicates that all herbicides were safe for wheat and other organisms at the tested dosages. Field efficacy trials showed that the combination of diflubenzuron, fluroxypyr, and isooctyl or clopyralid butyloxyisopropyl esters exhibited excellent control effects on annual weeds in wheat fields. Furthermore, this combination formulation was safe for wheat and beneficial organisms, with no phytotoxicity observed, demonstrating potential for promoting stable and increased wheat yields and warranting widespread application in production.

[0144] In summary, the composition of the present invention is a combination of diflubenzuron, fluopyridine ester, and clopyralid or their ester compounds. Its activity and herbicidal effect are not a simple sum of the activities of each component. Compared with existing single formulations, it has significant control effect on plots with multiple weeds, can delay the development of weed resistance, has low pesticide residue, good safety, and meets the safety requirements of pesticide formulations.

[0145] Although the present invention has been described in detail above with general description and specific embodiments, some modifications or improvements can be made to it based on the present invention, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. A herbicidal composition, characterized in that, The active ingredients of the herbicidal composition include active ingredient A, active ingredient B and active ingredient C, wherein active ingredient A is diflubenzuron, active ingredient B is fluroxypyr ester, and active ingredient C is clopyralid or its ester compound.

2. The herbicidal composition according to claim 1, characterized in that, The chloropyroxyacetic acid ester compounds mentioned are isooctyl chloropyroxyacetic acid, butoxyisopropyl chloropyroxyacetic acid, or methyl chloropyroxyacetic acid.

3. The herbicidal composition according to claim 1, characterized in that, The mass ratio of active ingredient A, active ingredient B and active ingredient C in the herbicidal composition is 0.5-20:0.5-25:5-200.

4. The herbicidal composition according to claim 1, characterized in that, The mass ratio of active ingredient A, active ingredient B and active ingredient C in the herbicidal composition is 1-10:1-20:5-100; Preferably, the mass ratio of active ingredient A, active ingredient B and active ingredient C in the herbicidal composition is 1-4:2-10:12-48; Preferably, the mass ratio of active ingredient A, active ingredient B, and active ingredient C in the herbicidal composition is 1:2:12, 1:2:24, 1:2:48, 1:6:12, 1:6:24, 1:6:48, 1:10:12, 1:10:24, 1:10:48, 2.5:2:12, 2.5:2:24, 2.5:2:48, 2.5:6:12, 2.5:6:24, 2.5:6:48, 2.5:10:12, 2.5:10:24, 2.5:10:48, 4:2:12, 4:2:24, 4:2:48, 4:6:12, 4:6:24, 4:6:48, 4:10:12, 4:10:24, or 4:10:

48.

5. The herbicidal composition according to claim 1, characterized in that, The active ingredients A, B, and C in the herbicidal composition have a mass percentage content of 0.5% to 90%. Preferably, the active ingredients A, B, and C in the herbicidal composition have a mass percentage content of 5-85%.

6. The herbicidal composition according to claim 1, characterized in that, In addition to the active ingredient, the herbicidal composition also includes agriculturally acceptable auxiliary ingredients selected from one or more of wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoamers, solvents, preservatives, stabilizers, synergists, or carriers.

7. The herbicidal composition according to claim 6, characterized in that, The herbicidal composition can be prepared into agriculturally permissible formulations.

8. The herbicidal composition according to claim 7, characterized in that, The dosage form is an emulsifiable concentrate, suspension concentrate, microemulsion, dispersible oil suspension, suspension emulsion, or wettable powder.

9. The application of the herbicidal composition according to claim 1 in controlling weeds in wheat fields.

10. The herbicidal composition according to claim 9, characterized in that, The wheat field weeds mentioned are one or more of the following: wild oats, wild oats, wild oats, cleavers, shepherd's purse, field bindweed, amaranth, purslane, thistle, duckweed, chickweed, and wild rapeseed; Preferably, the weeds in the wheat field are shepherd's purse, chickweed, cleavers, and shepherd's purse.

Images