A herbicidal composition

Abstract

The application discloses a kind of herbicidal composition and its application, the composition includes active ingredient A and active ingredient B, wherein active ingredient A is formula (I) compound, active ingredient B is selected from one or more of fluthiacet-methyl, trifludimoxazpyr, fluthiacet-methyl.The mass ratio of active ingredient A and active ingredient B of the composition is 1:50-50:1.The component of the application is reasonable, and the activity and herbicidal effect are not simply superimposed of each component, compared with single preparation, with the characteristics of significant herbicidal effect, low drug dosage, broad weed spectrum, good crop safety.

Description

Technical Field

[0001] This invention belongs to the field of pesticide compound weed control technology, specifically relating to a weed control composition. Background Technology

[0002] Benzofluorfen is a protoporphyrin oxidase inhibitor that can control a variety of annual broadleaf weeds. It is characterized by high efficiency, low toxicity, low residue, rapid effect, and wide application range. It is suitable for the control of weeds in wheat, barley, peanut, soybean, sugarcane, and rice fields.

[0003] Acifluorfene is a diphenyl herbicide developed by BASF in Germany. It is mainly used to control broadleaf weeds in fields such as soybeans and peanuts. It has high activity, rapid weed control, and a very broad spectrum of weed control. Compared with other herbicides, it is relatively environmentally friendly.

[0004] Fluthiacet is a contact herbicide applied post-emergence foliar spray. It belongs to the class of protoporphyrinogen oxidase inhibitors. It acts rapidly on the leaves of sensitive weeds, causing protoporphyrin accumulation and enhancing lipid peroxidation in cells. This leads to irreversible damage to the cell membrane structure and cell function of sensitive weeds, and necrotic spots appear on the leaves within 1 to 2 days under light conditions.

[0005] Herbicides containing a single active ingredient have varying degrees of shortcomings in weed control. Continuous use can easily lead to weed resistance, resulting in a narrowed spectrum of weed control and environmental pollution. Rational herbicide formulation is an effective method to improve control efficacy, broaden the weed control spectrum, delay weed resistance development, reduce environmental pollution, lower usage costs, and reduce herbicide residues.

[0006] The applicant unexpectedly discovered that mixing compound (I) with one or more of ethoxysulfuron, trifluralin, and methyl methacrylate exhibits a significant synergistic effect in controlling various annual or perennial weeds, while also reducing pesticide dosage, lowering control costs, and ensuring crop safety. Furthermore, a search revealed no reports of using compounds of formula (I) mixed with one or more of ethoxysulfuron, trifluralin, and methyl methacrylate for the control of annual or perennial weeds. Summary of the Invention

[0007] The purpose of this invention is to provide a herbicidal composition that is rationally formulated, has low application cost, significant synergistic effect, good herbicidal effect, broad spectrum of herbicides, and is safe for crops.

[0008] Another object of the present invention is to provide a herbicidal composition formulation containing a compound of formula (I) and ethoxysulfuron, trifluralin or methyl methacrylate.

[0009] Another object of the present invention is to provide the above-described herbicidal composition for the control of annual or perennial weeds in soybean fields.

[0010] To solve the above problems, the present invention provides the following technical solution: a weeding composition comprising active ingredient A and active ingredient B, wherein active ingredient A is a compound of formula (I):

[0011] Active ingredient B is selected from one or more of ethoxysulfuron, trifluralin, and methyl methacrylate;

[0012] Furthermore, the weight ratio of active ingredient A to active ingredient B in the herbicidal composition is 1:50-50:1;

[0013] Furthermore, the mass ratio of the compound of formula (Ⅰ) to ethoxysulfuron is 1:30-20:1;

[0014] The mass ratio of the compound of formula (I) to trifluralin is 1:40-40:1;

[0015] The mass ratio of the compound of formula (Ⅰ) to methyl methacrylate is 1:25-35:1;

[0016] Furthermore, the mass ratio of the compound of formula (Ⅰ) to ethoxysulfuron is 1:20-10:1;

[0017] The mass ratio of the compound of formula (Ⅰ) to trifluralin is 1:30-20:1;

[0018] The mass ratio of the compound of formula (Ⅰ) to methyl methacrylate is 1:15-20:1;

[0019] Furthermore, the mass ratio of compound (I) to ethoxysulfuron is 3:15, 3:30, 3:60, 6:15, 6:30, 6:60, 12:15, 12:30, 12:60;

[0020] The mass ratios of compound (I) to trifluralin are 3:50, 3:75, 3:100, 6:50, 6:75, 6:100, 12:50, 12:75, and 12:100.

[0021] The mass ratios of compound (I) to methyl methacrylate are 3:2.5, 3:5, 3:10, 6:2.5, 6:5, 6:10, 12:2.5, 12:5, and 12:10.

[0022] Furthermore, the mass ratio of compound (I) to ethoxysulfuron is 3:15, 3:30, 3:60, 6:15, 6:30, 6:60, 12:15, 12:30, 12:60;

[0023] The mass ratio of compound (I) to trifluralin is 3:50, 3:75, 6:50, 6:75, 6:100, 12:50, 12:75, and 12:100.

[0024] The mass ratios of compound (I) to methyl methacrylate are 3:2.5, 3:5, 3:10, 6:2.5, 6:5, 6:10, 12:2.5, 12:5, and 12:10.

[0025] Furthermore, the active ingredient A and active ingredient B together constitute 10% to 90% of the composition;

[0026] Furthermore, the combined mass of active ingredient A and active ingredient B constitutes 20% to 60% of the composition;

[0027] 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.

[0028] 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

[0029] 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

[0030] 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

[0031] 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

[0032] 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

[0033] Furthermore, the antifreeze is selected from one or more of alcohols, alcohol ethers, chlorinated hydrocarbons, and inorganic salts; and / or

[0034] Furthermore, the defoamer is selected from C 10 -C 20 One or more of the following: saturated fatty acid compounds, silicone oil, silicone compounds, and C8-C10 fatty alcohols; and / or

[0035] 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

[0036] 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

[0037] 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

[0038] Furthermore, the synergist is selected from synergistic phosphorus, synergistic ether; and / or

[0039] 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.

[0040] Furthermore, the herbicidal composition can be prepared into an agriculturally permissible formulation.

[0041] Furthermore, the herbicide composition can be formulated into solid and / or liquid formulations.

[0042] The solid dosage form is any one of powder, granules, wettable powder, water-dispersible granules, soluble powder, and soluble granules.

[0043] The liquid formulation is any one of emulsifiable concentrate, suspension concentrate, aqueous solution, water emulsion, microemulsion, soluble concentrate, and dispersible oil suspension;

[0044] Furthermore, the dosage form is any one of emulsifiable concentrate, suspension concentrate, wettable powder, water-dispersible granules, and dispersible oil suspension;

[0045] Furthermore, the composition is an emulsifiable concentrate, and the components and contents of the emulsifiable concentrate are preferably: 0.1 to 100 parts of active ingredient A, 0.1 to 100 parts of active ingredient B, 0.1 to 20 parts of emulsifier, and the remainder is made up with solvent;

[0046] Furthermore, the composition is a suspending agent, and the components and contents of the suspending agent are preferably as follows: 0.1-100 parts of active ingredient A, 0.1-100 parts of active ingredient B, 1-15 parts of dispersant, 0.5-20 parts of emulsifier, 1-10 parts of wetting agent, 1-10 parts of thickener, 0-10 parts of antifreeze, and deionized water to make up the balance;

[0047] Furthermore, the composition is a wettable powder, and the components and contents of the wettable powder are preferably: 0.1-100 parts of active ingredient A, 0.1-100 parts of active ingredient B, 1-20 parts of dispersant, 1-15 parts of wetting agent, and filler to make up the balance;

[0048] Furthermore, the composition is a water-dispersible granule, and the components and contents of the water-dispersible granule are preferably as follows: 0.1-100 parts of active ingredient A, 0.1-100 parts of active ingredient B, 1-15 parts of dispersant, 1-10 parts of wetting agent, 1-15 parts of disintegrant, 1-10 parts of binder, and filler to make up the balance.

[0049] Furthermore, the composition is a dispersible oil suspension, and the components and contents of the dispersible oil suspension are preferably as follows: active ingredient A 0.1-100 parts, active ingredient B 0.1-100 parts, dispersant 1-15 parts, emulsifier 0.5-20 parts, wetting agent 1-10 parts, thickener 1-10 parts, antifreeze 0-10 parts, and the remaining amount is made up by the dispersion medium;

[0050] The herbicidal composition described above is used for the control of unwanted plants;

[0051] Furthermore, the unwanted plants are annual weeds and / or perennial weeds;

[0052] Furthermore, unwanted plants are annual weeds and / or perennial weeds belonging to the Poaceae, Rubiaceae, Euphorbiaceae, Cyperaceae, Asteraceae, Polygonaceae, Scrophulariaceae, Solanaceae, Amaranthaceae, Caryophyllaceae, Brassicaceae, Lamiaceae, Fabaceae, Convolvulaceae, Boraginaceae, Commelinaceae, Malvaceae, and Chenopodiaceae families.

[0053] Annual or perennial weeds such as: Wild oats (Avena fatua), wild oats (Alopecurus aequalis), annual bluegrass (Poa annua), hard grass (Selerochloa kengiana), purslane (Beckmannia syzigachne), sorghum (Polypogon fugax), bromegrass (Bromus japonicas), cleavers (Galium aparine), helioscopia (Euphorbia helioscopia), persian speedwell (Veronica persica), cowherb (Malachium aquaticum), sileneconoidea (Sileneconoidea), vaccaria segetalia (Vaccaria segetalia), descurainia sophia (Descurainia sophia), thlaspiarvense (Thlaspiarvense), capsella bursa-pastoris (Capsella bursa-pastoris), lamium amplexicaule (Lamium amplexicaule), viciasativa (Viciasativa), bindweed (Calystegia hederacea), and celery stalk (Cerastium). viscosum, Stellaria alsine, Lithospermum arvense, Bothriospermum tenellum, Digitaria sanguinalis, Eleusine indica, Setaria viridis, Cyperus rotundus, Eclipta prostrata, Cephalanoplos segetum, Amaranthus retroflexus, Alternanthera philoxeroides, Portulaca oleracea, Solanum nigrum, Physalis angulata, Acalypha australis, Celosia argentea, Amaranthus spinosus, Xanthium sibiricum, Ageratum conyzoides, Commelina communis, Echinochloa crus-galli, Paspalum distichum, Alopecurus japonicus, Abutilontheophrasti, Chenopodium album, Rumexcrispus, Cassia tora, Stellaria media, Cerastium arvense, Veronica didyma, Erigeronannuus, Vicia sativa, Arabidopsis thaliana, Cyperus iria, Cyperus difformis, Polygonum hydropiper, Leptochloa chinensis, Cynodon dacylon, Euphorbia maculata, Cuscuta chinensis, Lapsana apogonoides, Sonchus oleraceus, Lxeris chinensis, Imperata cylindrical, Conyza canadensis, Humulus scandens, Cayratia japonica, Conyza bonariensis, Artemisia argyi, Artemisia annua, Ixeris sonchifolia;

[0054] Furthermore, unwanted plant growing locations include soybean fields, corn fields, peanut fields, wheat fields, rice paddies, vegetable fields, and orchards.

[0055] The beneficial effects of this invention are:

[0056] This invention improves herbicidal activity and has a significant synergistic effect. It can control multiple weeds in the field at the same time, expands the spectrum of weed control, makes up for the shortcomings of single agents in controlling major weeds, and is safe for soybeans. It effectively reduces farmers' application costs and improves economic benefits. Detailed Implementation

[0057] To make the objectives, technical solutions, and advantages of this invention clearer and more concise, the invention is described using the following specific embodiments, but the invention is by no means limited to these embodiments. The embodiments described below are merely preferred embodiments of the invention and can be used to describe the invention, but should not be construed as limiting the scope of the invention. It should be noted that any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the protection scope of this invention.

[0058] Formulation preparation examples

[0059] To better illustrate the present invention, the following description, in conjunction with embodiments, further explains the content of the present invention.

[0060] Preparation Example 1

[0061] 15% Formula (I) Compound·Ethyl carboxyfluzamide EC (3+12)

[0062] Formula composition: 3% compound of formula (I), 12% ethoxysulfone, 20% dimethyl sulfoxide, 15% cyclohexanone, 5% fatty alcohol polyoxyethylene ether, 8.5% styrene-phenol polyoxyethylene ether, 1% calcium dodecylbenzenesulfonate, methyl oleate to make up the balance;

[0063] Preparation method: Add the active ingredients to the carrier according to the formula ratio, and add surfactants and other functional additives to it. Stir and mix evenly in a mixing tank to obtain the emulsifiable oil product.

[0064] Preparation Example 2

[0065] 26% Formula (I) Compound Trifluralin EC (6+20)

[0066] Formula composition: 6% compound of formula (I), 20% trifluorocarboxylic acid, 25% dimethyl sulfoxide, 15% cyclohexanone, 4.5% fatty alcohol polyoxyethylene ether, 2% styrene-phenol polyoxyethylene ether, 3% alkylphenol polyoxyethylene polyoxypropylene ether, 1% calcium dodecylbenzenesulfonate, methyl oleate to make up the balance.

[0067] Preparation method: Same as in preparation example 1.

[0068] Preparation Example 3

[0069] 16% Formula (I) Compound·Methyl methacrylate emulsifiable concentrate (4+12)

[0070] Formula composition: 4% compound of formula (I), 12% methyl methacrylate, 10% dimethyl sulfoxide, 15% cyclohexanone, 5% fatty alcohol polyoxyethylene ether, 3% castor oil polyoxyethylene ether, 7% alkylphenol polyoxyethylene polyoxypropylene ether, 1.5% calcium dodecylbenzenesulfonate, and methyl oleate to make up the balance.

[0071] Preparation method: Same as in preparation example 1.

[0072] Preparation Example 4

[0073] 18% Formula (I) Compound·Ethyl carboxyfluzamide Suspension (3+15)

[0074] Formula composition: 3% compound of formula (I), 15% ethoxysulfonate, 1% fatty alcohol polyoxyethylene ether, 4% tristyrene phenol ethoxylate phosphate, 2% sodium lignosulfonate, 2% EO-PO block polyether, 0.4% magnesium aluminum silicate, 0.3% xanthan gum, 0.4% sorbitol, 0.1% sodium benzoate, 0.5% silicone oil, 5% glycerin, deionized water to make up the balance;

[0075] Preparation method: According to the formula ratio, water, dispersant and wetting agent are mixed evenly. Other functional additives are added under stirring. The mixture is then mixed evenly by high-speed shearing. Then the original drug is added and shearing is continued. The mixture is then ground in a horizontal sand mill. The particle size of the material is controlled to be below 90% of 5μm. Finally, the thickener is added and sheared evenly to obtain the suspension product.

[0076] Preparation Example 5

[0077] 40% Formula (I) Compound Trifluralin Suspension (8+32)

[0078] Formula composition: 8% compound of formula (I), 32% trifluorocarboxylic acid, 1% fatty alcohol polyoxyethylene ether, 3% dodecyl polyoxyethylene ether phosphate, 2% sodium alkyl polyoxyethylene ether sulfonate, 0.4% magnesium aluminum silicate, 0.2% xanthan gum, 4% sorbitol, 0.1% sodium benzoate, 0.5% silicone oil, 5% glycerin, deionized water to make up the balance;

[0079] Preparation method: Same as in preparation example 4.

[0080] Preparation Example 6

[0081] 20% Formula (I) Compound·Methyl methacrylate suspension (6+14)

[0082] Formula composition: 6% compound of formula (I), 14% methyl methacrylate, 1% isotridecyl alcohol polyoxyethylene ether, 4% dodecyl polyoxyethylene ether phosphate, 2% sodium lignosulfonate, 1% magnesium aluminum silicate, 0.2% xanthan gum, 0.4% sodium benzoate, 0.4% silicone oil, 5% glycerin, deionized water to make up the balance;

[0083] Preparation method: Same as in preparation example 4.

[0084] Preparation Example 7

[0085] 20% Formula (I) Compound·Ethyl carboxyfluzamide Wettable Powder (5+15)

[0086] Formula composition: 5% compound of formula (I), 15% ethoxyfluorfen, 2% sodium dodecyl sulfate, 5% alkylnaphthalene formaldehyde condensate calcium sulfonate, 5% alkylphenol polyoxyethylene ether sodium sulfonate, 2% alkylnaphthalene sulfonate sodium sulfonate, 4% talc, kaolin to make up the balance;

[0087] Preparation method: Add the active ingredients to the carrier according to the formula ratio, and add surfactants and other functional additives to it. Mix, pulverize by air jet and mix again to obtain a wettable powder product.

[0088] Preparation Example 8

[0089] 50% Formula (I) Compound·Ethyl carboxyfluzamide Water Dispersible Granules (10+40)

[0090] Formula composition: 10% of compound (I), 40% ethoxysulfonate, 10% sodium alkyl naphthalene sulfonate, 6% sodium lignosulfonate, 2% sodium alkyl sulfate, 2% sodium naphthalene sulfonate, 4% sodium carboxymethyl cellulose, 2% starch, and silica to make up the balance;

[0091] 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 10-25% water is added. Then, the mixture is kneaded, granulated, dried and sieved to obtain the water-dispersible granule product.

[0092] Preparation Example 9

[0093] 45% Formula (I) Compound·Methyl methacrylate water-dispersible granules (5+40)

[0094] Formula composition: 5% compound of formula (I), 40% methyl methacrylate, 8% sodium alkyl naphthalene sulfonate, 6% sodium lignin sulfonate, 2% sodium dibutyl naphthalene sulfonate, 2% sodium naphthalene sulfonate, 3.5% sodium carboxymethyl cellulose, 5% sodium sulfate, and silica to make up the balance;

[0095] Preparation method: Same as in preparation example 8.

[0096] Preparation Example 10

[0097] 14% Formula (I) Compound·Ethyl carboxyfluzamide Dispersible Oil Suspension (2+12)

[0098] Formula composition: 2% compound of formula (I), 12% ethoxyfluorfen, 2% sodium dioctyl succinate sulfonate, 15% castor oil polyoxyethylene ether, 2% fatty alcohol polyoxyethylene ether, 2% organobentonite, 1% fumed silica, and methyl oleate to make up the balance.

[0099] Preparation method: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reaction vessel in sequence, the oil phase is mixed evenly, and after high-speed shearing, wet sand milling, and finally homogenization filtration, the dispersible oil suspension product is obtained.

[0100] Activity test

[0101] Test basis: NY / T 1155.4-2006 "Guidelines for Indoor Bioassay of Pesticides - Herbicides Part 4: Determination of Herbicide Activity by Foliar Spray Method"; NY / T 1155.7-2006 "Guidelines for Indoor Bioassay of Pesticides - Herbicides Part 7: Determination of Combined Effects of Mixtures".

[0102] Experimental method: potted plant method

[0103] Experimental targets: foxtail grass, false sorghum, reverse-branch amaranth, cocklebur, and iron amaranth;

[0104] Test reagents: 95% ethoxysulfuron technical grade, 95% trifluralin technical grade, 95% methyl methacrylate technical grade, and compound (I) technical grade. All of the above technical grades were provided by the Group's R&D Center.

[0105] Instruments and equipment: light incubator, spray tower, electronic balance, pots (9cm in diameter), beakers, pipettes;

[0106] Experimental materials: Test soil was quantitatively filled to 4 / 5 of the pot's capacity. Bottom irrigation was used to ensure the soil was completely moistened. Pretreated weed seeds were evenly sown on the soil surface, covered with 0.5cm–2.0cm of soil depending on seed size, and then transplanted to a greenhouse for conventional cultivation. Weeds in dryland fields were irrigated from the bottom of the pot, while weeds in paddy fields were irrigated from the top until saturated. After emergence, thinning was performed to ensure uniform weed density.

[0107] Preparation of reagents: Water-soluble reagents should be dissolved and diluted directly with water. Other reagents should be dissolved in a suitable solvent (acetone, dimethylformamide, or dimethyl sulfoxide, etc.) and diluted with a 0.1% Tween 80 aqueous solution.

[0108] Chemical treatment: Standardized spraying was conducted, with foliar spraying performed in sequence from low to high doses according to the experimental design. Each treatment was replicated at least four times, and a control group without the chemical was included. The plants were cultured in a light-controlled incubator, and when the weeds reached the 1-3 leaf stage, 20 plants were planted per pot for spraying.

[0109] After treatment, the surface of the test materials was allowed to air dry naturally before being transferred to a greenhouse for routine cultivation. Weeds in dry fields were irrigated by drip irrigation from the bottom of the pots, while weeds in paddy fields were irrigated by top irrigation until saturation.

[0110] Survey: The growth status of the tested weeds was observed and recorded regularly after treatment. 14 days after treatment, weed control activity, the number of surviving weeds, and the symptoms of damage were investigated and recorded using visual inspection and absolute value (numerical measurement) methods.

[0111] The main symptoms are:

[0112] —Color changes (yellowing, whitening, etc.);

[0113] —Morphological changes (deformed or twisted new leaves, etc.);

[0114] —Growth changes (dehydration, wilting, dwarfing, clustering, etc.).

[0115] Visual inspection method:

[0116] The herbicidal activity of the herbicide is evaluated based on the symptoms and severity of weed damage to the test target.

[0117] The following unified grading method can be used for the survey:

[0118] Level 1: All dead;

[0119] Level 2: Equivalent to 0-2.5% of the weeds in the blank control area;

[0120] Level 3: Equivalent to 2.6%-5% of the weeds in the blank control area;

[0121] Level 4: Equivalent to 5.1%-10% of the weeds in the blank control area;

[0122] Level 5: Equivalent to 10.1%-15% of the weeds in the blank control area;

[0123] Level 6: Equivalent to 15.1%-25% of the weeds in the blank control area;

[0124] Level 7: Equivalent to 25.1%-35% of the weeds in the blank control area;

[0125] Level 8: Equivalent to 35.1%-67.5% of the weeds in the blank control area;

[0126] Level 9: Equivalent to 67.6%-100% of the weeds in the blank control area;

[0127] Absolute value survey method:

[0128] Based on the survey data, the fresh weight efficacy of each treatment was calculated using the following formula.

[0129] Fresh weight control efficacy E = (fresh weight of control area - fresh weight of treatment area) × 100 / fresh weight of control area

[0130] Data statistics and analysis:

[0131] Gowing method

[0132] The theoretical control efficacy of the mixture E0 = (Weed control efficacy of herbicide A at dosage P + Weed control efficacy of herbicide B at dosage Q - Weed control efficacy of herbicide A at dosage P × Weed control efficacy of herbicide B at dosage Q) ÷ 100

[0133] Evaluation criteria for the combined effects of mixed drugs: E-E0 > 10% indicates synergistic effect, E-E0 < -10% indicates antagonistic effect, and E-E0 between ±10% indicates additive effect.

[0134] Experimental results:

[0135] Indoor activity tests showed that compound (I) mixed with one of the following: ethoxysulfuron, trifluralin, or methyl methoxysulfuron, exhibited good indoor activity against common weeds such as foxtail grass, false sorghum, amaranth, cocklebur, and ironweed.

[0136] Compound (I) with mass ratios of acetoflufenicol of 3+15, 3+30, 3+60, 6+15, 6+30, 6+60, 12+15, 12+30, and 12+60 showed a synergistic effect on the control of foxtail grass, amaranth, cocklebur, and ironweed; compound (I) with mass ratios of trifluralin of 3+50, 3+75, 6+50, 6+75, and 6+100, Compounds 12+50, 12+75, and 12+100 showed synergistic effects on the control of foxtail grass, false sorghum, and cocklebur; compounds of formula (Ⅰ) with methyl methacrylate in mass ratios of 3+2.5, 3+5, 3+10, 6+2.5, 6+5, 6+10, 12+2.5, 12+5, and 12+10 showed synergistic effects on the control of foxtail grass, false sorghum, amaranth, cocklebur, and iron amaranth.

[0137] Table 1. Combined effects of various mixed combinations with foxtail grass

[0138]

[0139]

[0140] Table 2 Combined effects of various blends with false sorghum

[0141]

[0142]

[0143] Table 3. Combined effects of various mixed pairs on anti-branch amaranth.

[0144]

[0145]

[0146] Table 4. Combined effects of various mixed combinations on Xanthium sibiricum

[0147]

[0148]

[0149] Table 5. Combined effects of various mixed combinations on amaranth.

[0150]

[0151]

[0152] Field efficacy trials

[0153] Field efficacy trials of herbicides in soybean fields

[0154] Experimental site: Soybean field in Dongping County, Tai'an. The soil in this field is loam, the terrain is flat, and the fertility is moderate.

[0155] Crop: Soybean (Liaoning Soybean 11);

[0156] Test reagents and dosages:

[0157] Table 6. Drug Treatment and Dosage

[0158]

[0159] Experimental treatments: each treatment was replicated 3 times, with randomized block designs and plot sizes of 30 m². 2 .

[0160] Investigation methods: Observe whether there are symptoms of herbicide damage after crop emergence; conduct two efficacy surveys 20 days and 40 days after application, record the number of residual weeds, and calculate the control effect; weigh the fresh weight of weeds in the last survey and calculate the fresh weight control effect.

[0161] During the survey, three points were randomly selected within each neighborhood, each 0.25m in length. 2 Yield was measured at harvest time, and the yield increase rate was calculated.

[0162] Methods for calculating efficacy and yield:

[0163] Prevention and control efficacy (%) = (CK - PT) / CK × 100

[0164] In the formula: CK is the number of weeds (or fresh weight) in the control area; PT is the number of weeds (or fresh weight) in the treatment area.

[0165] Yield increase rate (%) = (Production in treatment area - Production in control area) / Production in control area × 100

[0166] Experimental Results and Analysis:

[0167] The results of continuous follow-up investigations after the experiment showed that no phytotoxicity occurred in any of the treatment areas, and that soybeans were relatively safe under normal dosage.

[0168] Field efficacy surveys conducted 20 and 40 days after application revealed the control effects of different treatments on weeds in soybean fields, as shown in Table 7. As shown in Table 7, 20 days after application, the control efficiencies of 14% Compound (I)·ethoxysulfuron dispersible oil suspension (2+12), 26% Compound (I)·trifluorosulfuron emulsifiable concentrate (6+20), and 16% Compound (I)·methyl methoxysulfuron emulsifiable concentrate (4+12) on weeds in soybean fields were 86.72%, 88.34%, and 87.05%, respectively, demonstrating significant control effects.

[0169] Table 7. Weed control efficacy of different treatments 20 days after application in soybean fields (control efficacy per plant).

[0170]

[0171] As shown in Table 8, with the increase of time, 40 days after application, the control efficacy of 14% compound (I)·ethoxysulfuron dispersible oil suspension (2+12), 26% compound (I)·trifluorosulfuron emulsifiable concentrate (6+20), and 16% compound (I)·methyl methoxysulfuron emulsifiable concentrate (4+12) against weeds in soybean fields was 92.24%, 93.75%, and 92.27%, respectively, showing good residual efficacy.

[0172] Table 8. Weed control efficacy of different treatments 40 days after application in soybean fields (fresh weight).

[0173]

[0174]

[0175] As shown in Table 9, all mixed treatments increased yield compared to the control group, with an increase rate of over 15.56%. Among them, the 16% compound (I) methyl methacrylate emulsifiable concentrate (4+12) showed the most significant increase in yield, with an increase rate of 16.89%.

[0176] Table 9. Effects of different treatments on soybean yield

[0177]

[0178] Field trial results showed that, in terms of soybean safety, growth rate, and weed control efficacy, 14% compound (I) · ethoxysulfuron dispersible oil suspension (2+12), 26% compound (I) · trifluralin emulsifiable concentrate (6+20), and 16% compound (I) · methyl methacrylate emulsifiable concentrate (4+12) were all superior to the control single agent.

[0179] In summary, the herbicidal composition of the present invention is a combination of compound (I) and any one of ethoxysulfuron, trifluralin, or methyl methacrylate. Its activity and herbicidal effect are not a simple summation of the activities of each component. Compared with existing single formulations, it has significant control efficacy against mixed infestations of various grass and broadleaf weeds, with significant synergistic effects, can delay resistance, has low pesticide residue, good safety, and meets the safety requirements of pesticide formulations.

[0180] 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 by comprising: The composition comprises active ingredient A and active ingredient B, wherein the active ingredient A is a compound of formula (I): (I), the active ingredient B is selected from one or more of fluroxypyr, L- 627, fluroxypyr-meptyl, fluroxypyr-choline, fluroxypyr-ethyl, fluroxypyr- butyl, fluroxypyr-ethyl-ester, fluroxypyr-ethyl-ester, fluroxypyr-ethyl-ester, flurox The mass ratio of the compound of formula (I) to fluroxypyr is 3:60-12:15; The mass ratio of the compound of formula (I) to trifludimoxystrobin is 3:75-12:50; The mass ratio of the compound of formula (I) to metribuzin is 3:10-12:2.

5.

2. The herbicidal composition according to claim 1, characterized by The mass ratio of the compound of formula (I) to fluroxypyr is 3:15, 3:30, 3:60, 6:15, 6:30, 6:60, 12:15, 12:30, 12:60; The mass ratio of the compound of formula (I) to trifludimoxystrobin is 3:50, 3:75, 6:50, 6:75, 6:100, 12:50, 12:75, 12:100; The mass ratio of the compound of formula (I) to metribuzin is 3:2.5, 3:5, 3:10, 6:2.5, 6:5, 6:10, 12:2.5, 12:5, 12:

10.

3. The herbicidal composition according to claim 1, characterized by The mass of the active ingredient A and the active ingredient B accounts for 10%-90% of the composition.

4. The herbicidal composition according to claim 3, characterized by The mass of the active ingredient A and the active ingredient B accounts for 20%-60% of the composition.

5. The herbicidal composition according to claim 1, characterized by: The herbicidal composition further comprises an auxiliary ingredient selected from one or more of wetting agent, dispersing agent, emulsifying agent, thickening agent, disintegrating agent, antifreezing agent, antifoaming agent, solvent, preservative, stabilizer, synergist, binder or filler.

6. The herbicidal composition according to claim 1, characterized by The herbicidal composition is prepared into any one of emulsifiable concentrate, suspension concentrate, wettable powder, water dispersible granule or dispersible oil suspension.

7. The use of a herbicidal composition according to any one of claims 1 to 6 for controlling undesirable vegetation, characterized in that, The unwanted plants are dogtail grass, false corn, amaranth, ironweed.

8. Use according to claim 7, characterized in that, The growth site of the unwanted plants is soybean field. The unwanted plants are dogtail grass, false corn, amaranth, ironweed. The growth site of the unwanted plants is soybean field.

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