A herbicidal composition

Abstract

The application discloses a kind of herbicide 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 lactofen, pyraclonil.The mass ratio of active ingredient A and active ingredient B of the composition is 1:40-50:1.The application also relates to the use of the herbicide composition in controlling the germination or growth of weeds in useful plants, particularly suitable for controlling the germination or growth of weeds in soybean field, peanut field.

Description

Technical Field

[0001] This invention belongs to the field of compound herbicide technology, specifically relating to a herbicide composition containing quizalofop-P-ethyl or bispyribac-sodium. Background Technology

[0002] Soybeans and peanuts are important oilseed crops in China, and their planting area has been increasing year by year since the 1980s. In recent years, due to changes in farming practices, especially the long-term use of herbicides such as acetochlor for chemical weed control, the weed populations in soybean and peanut fields have undergone serious changes. Community succession has accelerated, the population of grass weeds has declined, and the populations of broadleaf weeds such as amaranth, retroflexus, and cocklebur have increased significantly, causing increasingly severe damage year by year. They have risen to become major weeds and have become an important factor affecting soybean and peanut production.

[0003] Lactofen, developed by PPG Industries in 1965, is a post-emergent herbicide and a protoporphyrinogen oxidase inhibitor. It is widely used to control broadleaf weeds in soybean, cereal, potato, and peanut fields. As a diphenyl ether herbicide, lacofen's mechanism of action is consistent with other diphenyl ether herbicides, controlling protoporphyrinogen oxidase activity to achieve weed control.

[0004] Pyraclonil is a pyrazole-based contact herbicide developed by Bayer. It exerts its effect by causing the accumulation of protoporphyrinogen oxidase in plants. After treatment, weeds exhibit symptoms such as leaf curling, yellowing, and wilting, eventually dying from drying out. It has a unique mechanism of action, low toxicity, high activity, is safe for rice, has a moderate residual period, and does not affect subsequent crops. It is effective in controlling various weeds, including barnyard grass, duckweed, and sedge.

[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 herbicides and environmental pollution. Rational herbicide formulation is an effective method to improve control efficacy, broaden the spectrum of herbicides, delay weed resistance development, reduce environmental pollution, lower usage costs, and reduce herbicide residues. The applicant unexpectedly discovered that mixing compound (I) with one or more of quizalofop-P-ethyl or bispyribac-methyl exhibits significant synergistic control effects against various annual or perennial weeds, while also reducing dosage, lowering control costs, and ensuring crop safety. Furthermore, a search revealed no reports of mixtures containing compound (I) with one or more of quizalofop-P-ethyl or bispyribac-methyl for the control of annual or perennial weeds. Summary of the Invention

[0006] 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.

[0007] Another object of the present invention is to provide a herbicidal composition formulation containing a compound of formula (I) and either haloxyfop-R-methyl or bispyribac-methyl.

[0008] Another object of the present invention is to provide the above-mentioned herbicidal composition for the control of annual or perennial weeds in soybean and peanut fields.

[0009] 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):

[0010] Active ingredient B is selected from one or more of flufenoxuron and bispyribac-sodium;

[0011] Furthermore, the weight ratio of active ingredient A to active ingredient B in the herbicidal composition is 1:40-50:1;

[0012] Furthermore, the mass ratio of the compound of formula (I) to haloxyfop-R-methyl is 1:20-10:1;

[0013] Furthermore, the mass ratio of the compound of formula (Ⅰ) to haloxyfop-R-methyl is 1:8-5:1;

[0014] Further, the mass ratio of the compound of formula (I) to haloxyfop-R-methyl is 5:10, 5:25, 5:40, 10:10, 10:25, 10:40, 15:10, 15:25, or 15:40;

[0015] Furthermore, the mass ratio of the compound of formula (Ⅰ) to bispyribac-sodium is 1:15-10:1;

[0016] Furthermore, the mass ratio of the compound of formula (Ⅰ) to bispyribac-sodium is 1:10-5:1;

[0017] Further, the mass ratio of the compound of formula (I) to bispyribac is 5:25, 5:50, 5:75, 10:25, 10:50, 10:75, 15:25, 15:50, 15:75;

[0018] Further, the mass ratio of the compound of formula (I) to bispyribac is 5:25, 5:50, 10:25, 10:50, 10:75, 15:25, 15:50, and 15:75;

[0019] Furthermore, the active ingredient A and active ingredient B together constitute 1% to 90% of the composition;

[0020] Furthermore, the active ingredient A and active ingredient B together constitute 5% to 85% of the composition;

[0021] Furthermore, the mass of active ingredient A and active ingredient B accounts for 10% to 60% of the composition;

[0022] Furthermore, the active ingredients A and B constitute 10%, 15%, 20%, 22%, 25%, 32%, 35%, 40%, 42%, 45%, 50%, 55%, and 60% of the composition, respectively.

[0023] 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.

[0024] 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

[0025] 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

[0026] 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

[0027] 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

[0028] 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

[0029] Furthermore, the antifreeze is selected from one or more of alcohols, alcohol ethers, chlorinated hydrocarbons, and inorganic salts; and / or

[0030] 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

[0031] 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

[0032] 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

[0033] 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

[0034] Furthermore, the synergist is selected from synergistic phosphorus, synergistic ether; and / or

[0035] 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.

[0036] Furthermore, the herbicidal composition can be prepared into an agriculturally permissible formulation.

[0037] Furthermore, the herbicide composition can be formulated into solid and / or liquid formulations.

[0038] The solid dosage form is any one of powder, granules, wettable powder, water-dispersible granules, soluble powder, and soluble granules.

[0039] The liquid formulation is any one of emulsifiable concentrate, suspension concentrate, aqueous solution, water emulsion, microemulsion, soluble concentrate, and dispersible oil suspension;

[0040] Furthermore, the dosage form is any one of emulsifiable concentrate, suspension concentrate, wettable powder, water-dispersible granules, and dispersible oil suspension;

[0041] 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;

[0042] 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;

[0043] 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;

[0044] 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.

[0045] 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;

[0046] The herbicidal composition described above is used for the control of unwanted plants;

[0047] Furthermore, the unwanted plants are annual weeds and / or perennial weeds;

[0048] 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.

[0049] 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;

[0050] Furthermore, unwanted plant growing locations include soybean fields, corn fields, peanut fields, wheat fields, rice fields, vegetable fields, and orchards;

[0051] Furthermore, it is particularly suitable for controlling the germination or growth of weeds in soybean and peanut fields.

[0052] The beneficial effects of this invention are:

[0053] This invention improves herbicidal activity and has a significant synergistic effect. It can control multiple weeds in the field at the same time, expand the spectrum of weed control, make up for the shortcomings of single agents in controlling major weeds, and is safe for crops. It effectively reduces farmers' application costs and improves economic benefits. Detailed Implementation

[0054] 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.

[0055] Formulation preparation examples

[0056] To better illustrate the present invention, the following description, in conjunction with embodiments, further explains the content of the present invention.

[0057] Preparation Example 1

[0058] 14% Formula (I) Compound·Lactobacillus fluoride EC (4+10)

[0059] Formula composition: 4% compound of formula (I), 10% quizalofop-P-ethyl, 22% dimethyl sulfoxide, 6.5% fatty alcohol polyoxyethylene ether, 8% styrene-phenol polyoxyethylene ether, 1.5% calcium dodecylbenzenesulfonate, 10% cyclohexanone, methyl oleate to make up the balance;

[0060] 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.

[0061] Preparation Example 2

[0062] 6% Formula (I) compound · Bisoxane EC (1+5)

[0063] Formulation composition: 1% compound of formula (I), 5% bispyrazine, 20% dimethyl sulfoxide, 4.5% fatty alcohol polyoxyethylene ether, 6.2% styrene-phenol polyoxyethylene ether, 1.5% calcium dodecylbenzenesulfonate, 10% N-methylpyrrolidone, 10% cyclohexanone, methyl oleate to make up the balance;

[0064] Preparation method: Same as in preparation example 1.

[0065] Preparation Example 3

[0066] 20% Formula (I) Compound·Lactobacillus fluoride suspension (4+16)

[0067] Formula composition: 4% compound of formula (I), 16% quizalofop-P-ethyl, 3% fatty alcohol ethylene oxide-propylene oxide copolymer, 1% sodium lignosulfonate, 4% alkyl polyoxyethylene ether phosphate salt, 0.4% magnesium aluminum silicate, 0.2% xanthan gum, 0.5% sodium benzoate, 4.5% ethylene glycol, 0.5% silicone defoamer, deionized water to make up the balance;

[0068] 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.

[0069] Preparation Example 4

[0070] 30% Formula (I) Compound·Biazonium Suspension Concentrate (5+25)

[0071] Formula composition: 5% compound of formula (I), 25% bispyribac-sodium, 4% dodecyl polyoxyethylene ether phosphate, 2% fatty alcohol polyoxyethylene ether, 1% sodium polycarboxylate, 0.4% magnesium aluminum silicate, 0.5% sorbitol, 0.1% sodium benzoate, 0.5% silicone oil, 4.5% ethylene glycol, deionized water to make up the balance;

[0072] Preparation method: Same as in preparation example 3.

[0073] Preparation Example 5

[0074] 32% Formula (I) Compound·Lactobacillus fluoride wettable powder (8+24)

[0075] Formula composition: 8% compound of formula (I), 24% fluoride sulfonate, 5% alkylnaphthalene formaldehyde condensate calcium sulfonate, 5% sodium lignosulfonate, 2% sodium alkylnaphthalene sulfonate, 2% sodium dodecyl sulfate, 3% organobentonite, 20% silica, and kaolin to make up the balance;

[0076] 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.

[0077] Preparation Example 6

[0078] 45% Formula (I) Compound·Lactobacillus fluoride water-dispersible granules (9+36)

[0079] Formula composition: 9% compound of formula (I), 36% quizalofop-P-ethyl, 10% sodium alkyl naphthalene sulfonate, 6% sodium lignin sulfonate, 2% sodium alkyl sulfate, 2% sodium naphthalene sulfonate, 4.5% sodium carboxymethyl cellulose, 2% starch, and silica to make up the balance;

[0080] 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.

[0081] Preparation Example 7

[0082] 40% Formula (I) Compound·Biazoxane Water Dispersible Granules (8+32)

[0083] Formula composition: 8% of compound (I), 32% bispyribac-sodium, 10% sodium alkyl naphthalene sulfonate, 4% 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;

[0084] Preparation method: Same as in preparation example 6.

[0085] Preparation Example 8

[0086] 20% Formula (I) Compound·Lactobacillus fluoride dispersible oil suspension (10+10)

[0087] Formula composition: 10% of compound (Ⅰ), 10% quizalofop-P-ethyl, 2% sodium diisooctyl succinate sulfonate, 2% fatty alcohol polyoxyethylene ether, 15% castor oil polyoxyethylene ether, 4% calcium dodecylbenzene sulfonate, 0.5% fumed silica, 0.5% organic bentonite, and soybean oil to make up the balance.

[0088] 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.

[0089] Activity test

[0090] 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".

[0091] Experimental method: potted plant method

[0092] Experimental targets: crabgrass, ryegrass, amaranth retroflexus, cocklebur;

[0093] Test reagents: flufenoxuron technical, bispyribac technical, and compound (I) technical. All technicals were provided by the Group's R&D Center.

[0094] Instruments and equipment: light incubator, spray tower, electronic balance, pots (9cm in diameter), beakers, pipettes;

[0095] Test materials: A measured amount of soil was filled to 4 / 5 of the pots. The soil was thoroughly moistened using bottom watering. Pretreated weed seeds were evenly sown on the soil surface, covered with 0.5-2.0 cm of soil depending on seed size, and then transplanted to a greenhouse for conventional cultivation. The weeds were watered to saturation using bottom watering. After emergence, thinning was performed to ensure uniform weed density (120-150 plants per square meter).

[0096] 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.

[0097] 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.

[0098] 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 dryland fields were irrigated by bottom drip irrigation in pots, while weeds in paddy fields were irrigated by top irrigation until saturation. A digital temperature and humidity recorder was used to record the dynamic temperature and humidity data within the greenhouse during the experiment.

[0099] 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.

[0100] The main symptoms are:

[0101] —Color changes (yellowing, whitening, etc.);

[0102] —Morphological changes (deformed or twisted new leaves, etc.);

[0103] —Growth changes (dehydration, wilting, dwarfing, clustering, etc.).

[0104] Absolute value survey method:

[0105] Based on the survey data, the fresh weight efficacy of each treatment was calculated using the following formula.

[0106] Fresh weight control efficacy E = (fresh weight of control area - fresh weight of treatment area) × 100 / fresh weight of control area

[0107] Data statistics and analysis:

[0108] Gowing method:

[0109] 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

[0110] Evaluation criteria for the combined effects of mixed drugs:

[0111] E-E0 > 10% indicates a synergistic effect, E-E0 < -10% indicates an antagonistic effect, and E-E0 between ±10% indicates an additive effect.

[0112] Experimental results:

[0113] Indoor activity tests showed that compound (I) mixed with one of quizalofop-P-ethyl or cyprodinil exhibited good indoor activity against common weeds such as crabgrass, ryegrass, amaranth, and cocklebur. Specifically, the mass ratios of compound (I) to quizalofop-P-ethyl of 5:10, 5:25, 5:40, 10:10, 10:25, 10:40, 15:10, 15:25, and 15:40 showed a synergistic effect on the control of crabgrass, ryegrass, amaranth, and cocklebur; the mass ratios of compound (I) to cyprodinil of 5:25, 5:50, 10:25, 10:50, 10:75, 15:25, 15:50, and 15:75 also showed a synergistic effect on the control of crabgrass, ryegrass, amaranth, and cocklebur.

[0114] Table 1. Combined effects of various mixed combinations of crabgrass

[0115]

[0116] Table 2. Combined effects of various blends with ryegrass

[0117]

[0118]

[0119] Table 3. Combined effects of various mixed pairs on anti-branch amaranth.

[0120]

[0121]

[0122] Table 4. Combined effects of various mixed combinations on Xanthium sibiricum

[0123]

[0124] Field efficacy trials

[0125] Field Trial 1

[0126] Field efficacy trial for controlling weeds in peanut fields

[0127] The experiment was conducted in a spring-sown peanut field in Xinqiao Village, Huangwan Township, Fengyang County, Anhui Province. The experimental site had high fertility, flat terrain, and had historically experienced severe and uniform damage from broadleaf weeds.

[0128] Crop: Peanuts (Luhua No. 8) were planted in open fields on April 20th, with a planting density of 30cm×30cm; field operations were carried out according to standard procedures.

[0129] The main weeds that cause damage in the field include: amaranth, black nightshade, purslane, cocklebur, crabgrass, barnyard grass, and goosegrass.

[0130] Test reagents and dosages:

[0131] Table 5. Drug treatment and dosage

[0132]

[0133] Experimental treatments: each treatment was replicated 4 times, with randomized block designs and plot sizes of 20 m². 2 .

[0134] Application method: Apply the pesticide 20 days after peanut sowing, when the peanuts have 3-5 leaves, broadleaf weeds have reached the 3-4 leaf stage and the plant height is 2-3 cm, and grass weeds are at the 1-3 leaf stage. Apply the pesticide on a sunny day using a Gongnong-16 backpack compressor sprayer specifically designed for small-scale applications, spraying evenly at a concentration of 675 kg / hm². 2 Spray an equal amount of water in the blank control area, and keep the field moist during and after application.

[0135] Investigation Methods: After application, the responses of peanut seedlings and weeds to the pesticide were observed and recorded periodically—that is, the safety of the pesticide to peanut plants, the occurrence of phytotoxicity, and the symptoms of phytotoxicity. Twenty days after application, the weeding effect was assessed using a visual inspection method with a 9-level scale.

[0136] Grading method:

[0137] Level 1: All dead;

[0138] Level 2: Equivalent to 0-2.5% of the weeds in the blank control area;

[0139] Level 3: Equivalent to 2.6%–5% of the weeds in the blank control area;

[0140] Level 4: Equivalent to 5.1% to 10% of the weeds in the blank control area;

[0141] Level 5: Equivalent to 10.1%–15% of the weeds in the blank control area;

[0142] Level 6: Equivalent to 15.1%–25% of the weeds in the blank control area;

[0143] Level 7: Equivalent to 25.1%–35% of the weeds in the blank control area;

[0144] Level 8: Equivalent to 35.1%–67.5% of the weeds in the blank control area;

[0145] Level 9: Equivalent to 67.6% to 100% of the weeds in the blank control area.

[0146] The herbicidal effect was investigated 30 days after application using a sampling method with five diagonal sampling points per 1m in the treatment area. 2 The fresh weight of each aboveground weed was investigated, and the weed control efficacy per plant was calculated compared with the control area without weeding. Plant traits were examined and yield was measured by region at peanut harvest. The average of four replicates was used for calculation.

[0147] The efficacy of the drug is calculated using the following formula:

[0148] Prevention and control efficacy (%) = (CK - PT) / CK × 100

[0149] In the formula:

[0150] CK represents the fresh weight of the control area;

[0151] PT represents the fresh weight of the processing area.

[0152] Experimental results:

[0153] Field efficacy surveys conducted 20 and 30 days after application revealed the control effects of different treatments on weeds in peanut fields, as shown in Table 6 above. Using visual inspection, at 20 days post-application, the effective dosages of 6% compound (I)·bifenthrin EC (1+5) and 20% compound (I)·quizalofop-P-ethyl SC (4+16) were 30 and 60 a.ig / hm, respectively. 2 The efficacy against weeds in peanut fields was level 9, and 30 days after application, the efficacy was above 87.75%, demonstrating excellent control effect.

[0154] Table 6. Control effects of different post-drug treatments on weeds in peanut fields.

[0155]

[0156] As shown in Table 7, the effective ingredient dosages for 6% compound (I)·bifenthrin EC (1+5) and 20% compound (I)·flufenoxam SC (4+16) are 30 and 60 a.ig / hm, respectively. 2 It has a yield-promoting effect on peanuts and exhibits excellent prevention and control effects.

[0157] Table 7. Control effects of different post-drug treatments on weeds in peanut fields.

[0158]

[0159]

[0160] Field Trial 2

[0161] Field efficacy trial for controlling weeds in soybean fields

[0162] Experimental location: Soybean field in Zhangqiu, Jinan, with sandy loam soil, flat terrain, and soil organic matter content of 2.8%.

[0163] Crop: Soybean (Suinong 14);

[0164] Test reagents and dosages:

[0165] Table 8. Drug Treatment and Dosage

[0166]

[0167] Experimental treatments: each treatment was replicated 4 times, with randomized block designs and plot sizes of 20 m². 2 .

[0168] Investigation methods: After crop emergence, observe for any symptoms of herbicide damage; conduct two efficacy surveys at 12 and 40 days after application, record the number of residual weeds, and calculate the control effect; finally, weigh the fresh weight of the weeds and calculate the fresh weight control effect.

[0169] 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.

[0170] Methods for calculating efficacy and yield:

[0171] Prevention and control efficacy (%) = (CK - PT) / CK × 100

[0172] 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.

[0173] Yield increase rate (%) = (Production in treatment area - Production in control area) / Production in control area × 100

[0174] Experimental Results and Analysis:

[0175] 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.

[0176] Field efficacy surveys conducted 12 and 40 days after application revealed the control effects of different treatments on soybean weeds, as shown in Table 9. 12 days after application, the control efficiencies of 6% compound (I)·bifenthrin EC (1+5) and 20% compound (I)·flufenoxam SC (4+16) on soybean weeds were 88.68% and 86.92%, respectively, demonstrating good rapid efficacy.

[0177] 40 days after application, the 6% compound (I)·bimethrin EC (1+5) and the 20% compound (I)·flufenoxam SC (4+16) showed good weed control efficacy against soybean fields of 92.57% and 91.15%, respectively, demonstrating good residual efficacy.

[0178] Table 9. Control effects of different treatments on weeds in soybean fields.

[0179]

[0180] As shown in Table 10, all mixed treatments showed yield increases compared to the control group, with increases exceeding 20%. The yield increases for 6% compound (I)·bifenthrin EC (1+5) and 20% compound (I)·flufenoxam SC (4+16) were 25.14% and 21.61%, respectively.

[0181] Table 10 Effects of different treatments on soybean yield

[0182]

[0183] In summary, the herbicidal composition of the present invention is a combination of compound of formula (I) and either bispyribac-sodium or quizalofop-P-ethyl. 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 effect on plots with mixed occurrence of various grass weeds and broadleaf weeds, with significant synergistic effect, can delay resistance, has low pesticide residue, good safety, and meets the safety requirements of pesticide formulations.

[0184] 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 lactofen, pyroxasulfone. The mass ratio of the compound of formula (I) to lactofen is 5:40-15:10; The mass ratio of the compound of formula (I) to pyraclonil is 5:50-15:

25.

2. The herbicidal composition according to claim 1, characterized by The mass ratio of the compound of formula (I) to lactofen is 5:10, 5:25, 5:40, 10:10, 10:25, 10:40, 15:10, 15:25, 15:

40. The mass ratio of the compound of formula (I) to pyraclonil is 5:25, 5:50, 10:25, 10:50, 10:75, 15:25, 15:50, 15:

75.

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

4. The herbicidal composition according to claim 1, characterized by The mass of the active ingredient A and the active ingredient B accounts for 5-85% of the composition.

5. The herbicidal composition according to claim 1, characterized by: The herbicidal composition further comprises auxiliary ingredients in addition to the active ingredients, and the auxiliary ingredients are selected from one or more of wetting agents, dispersants, emulsifiers, thickening agents, disintegrating agents, antifreezing agents, antifoaming agents, solvents, preservatives, stabilizers, synergists, binders or fillers.

6. The herbicidal composition according to claim 1, characterized by The herbicidal composition can be prepared into any 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 Digitaria sanguinalis, Lolium multiflorum, Amaranthus retroflexus and Xanthium.

8. Use according to claim 7, characterized in that, The growth site of the unwanted plants is soybean field or peanut field.

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