A herbicidal composition and use thereof

Abstract

The application discloses a kind of herbicides, the effective component of the herbicides includes active ingredient A pyroxasulfone, active ingredient B flumioxazine, the mass ratio of pyroxasulfone and flumioxazine is 1:18~18:1.The herbicides of the application can reduce the use amount of single herbicide while improving the overall control effect, has synergistic effect on common weed control effect under certain mass ratio, can significantly reduce the dosage, delay weed resistance.

Description

Technical Field

[0001] This invention belongs to the field of herbicide technology, specifically relating to a herbicide composition and its application. Background Technology

[0002] Pyroxasulfone is a novel, broad-spectrum, highly active pre-emergence soil-applied herbicide developed by Japan's Combined Chemicals Industry Co., Ltd. The Herbicide Resistance Action Committee (HRAC) classifies sulfopyrazosulfuron as a K3: very long-chain fatty acid (cell division) inhibitor based on its mechanism of action. It inhibits the synthesis of very long-chain fatty acid elongases (VLCFAs) in plants, thereby hindering the growth of meristems and coleoptiles. Fendioxypyracil is a PPO inhibitor effective against grassy weeds. Combining herbicides with completely different mechanisms of action is an important strategy for managing weed resistance and delaying its development. By combining herbicides, cross-resistance can be reduced, effectively controlling resistant weeds.

[0003] Herbicide blending technology, as an important development direction in modern agricultural plant protection, aims to solve the many challenges faced by single herbicides in practical applications through the scientific combination of multiple effective ingredients. This invention combines bensulfuron-methyl and clodinafop-propargyl, expanding the weed control spectrum through the rational compounding or mixing of herbicidal compounds, improving control efficacy, and delaying the occurrence and development of herbicide resistance in weeds. Summary of the Invention

[0004] Based on the above, the purpose of this invention is to provide a weed control composition.

[0005] Another object of the present invention is to provide a herbicidal composition for controlling weeds in wheat fields. This herbicidal composition has a broadened spectrum of weed control, exhibits excellent control effects against common grasses and broadleaf weeds, and is safe for crops.

[0006] 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 and active ingredient B, wherein active ingredient A is benzylpyrimethanil and active ingredient B is clodinafop-propargyl; wherein the mass ratio of benzylpyrimethanil to clodinafop-propargyl is 1:18 to 18:1. Further, the mass ratio of active ingredient A to active ingredient B is 1:18 to 8:1; preferably, the mass ratio of bensulfuron-methyl to cyclophosphamide is 1:12 to 8:1. Further, the mass ratio of bensulfuron-methyl to cyclophosphamide is 1:2, 1:6, 1:12, 1:18, 4:2, 4:6, 4:12, 4:18, 8:2, 8:6, 8:12, 8:18, 16:2, 16:6, 16:12, or 16:18. Further, the mass ratio of bensulfuron-methyl to cyclophosphamide is 1:2, 1:6, 1:12, 4:2, 4:6, 4:12, 4:18, 8:2, 8:6, 8:12, 8:18, 16:2, 16:6, 16:12, or 16:18. Furthermore, the mass percentage of active ingredients A and B in the herbicidal composition is 1-90%; Furthermore, the mass percentage of active ingredients A and B in the herbicidal composition is 10-80%; 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. Further, the wetting agent is one or more of the following: alkylbenzene sulfonate, alkylnaphthalene sulfonate, lignin sulfonate, sodium dodecyl sulfate, sodium dioctyl succinate sulfonate, α-olefin sulfonate, alkylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, alkylphenol ethoxylate, fatty alcohol ethoxylate, sodium fatty alcohol polyoxyethylene ether sulfate, silkworm excrement, soapberry powder, soapberry powder, SOPA, detergent, emulsifier 2000 series, and wetting and penetrating agent F; and / or Further, the dispersant is one or more of the following: lignin sulfonate, alkylnaphthalene 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 Further, the emulsifier is 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 Further, the thickener is one or more of xanthan gum, organobentonite, gum arabic, sodium alginate, magnesium aluminum silicate, carboxymethyl cellulose, and silica; and / or Further, the disintegrant is 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 Furthermore, the antifreeze is one or more selected from alcohols, alcohol ethers, chlorinated hydrocarbons, and inorganic salts; and / or Furthermore, the defoamer is C 10 -C 20 Saturated fatty acid compounds, silicone oil, silicone compounds, C8-C 10 One or more of the fatty alcohols; and / or Further, the preservative is one or more selected from 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 Further, the stabilizer is 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 Furthermore, the synergist is selected from synergistic phosphorus, synergistic ether; and / or Furthermore, the filler is a solvent, filler, or carrier; Further, the solvent is one or more of benzene, toluene, xylene, mesitylene, methanol, ethanol, isopropanol, n-butanol, dimethyl sulfoxide, dimethylformamide, cyclohexanone, hydrocarbon carbonate, diesel oil, solvent oil, vegetable oil, vegetable oil derivatives, and water; and / or Furthermore, the carrier is one or more of the following: ammonium salt, ground natural mineral, ground artificial mineral, silicate, resin, wax, solid fertilizer, water, organic solvent, mineral oil, vegetable oil, and vegetable oil derivatives.

[0007] Furthermore, the herbicidal composition can be prepared into an agriculturally permissible formulation. Furthermore, the dosage form is a soluble concentrate, a suspension concentrate, a water-dispersible granule, or a dispersible oil suspension; The application of a herbicidal composition in controlling weeds in crop fields, wherein the crop is wheat.

[0008] Furthermore, the weeds mentioned are ryegrass, Japanese wild oats, shepherd's purse, and speedwell.

[0009] Furthermore, the herbicidal composition is applied to unwanted plants or their growing areas.

[0010] The herbicide composition of the present invention has the following advantages: The herbicidal composition of the present invention can improve the overall control effect while reducing the amount of single herbicide used. Under certain mass ratios, it has a synergistic effect on the control of common weeds, can significantly reduce the amount of pesticide used, and delay the development of weed resistance. Detailed Implementation Plan

[0011] To better illustrate the present invention, the following description, in conjunction with embodiments, further explains the content of the present invention. Example

[0012] 28% Benpyrazosulfuron-methyl·Zanthoxysulfuron-methyl dispersible oil suspension (12+16) Formula composition: 12% Benpyrazosulfuron 16% cyclohexane 2.5% Sodium Dodecyl Sulfate 6.5% Sodium Lignosulfonate 7% Fatty Acid Ester Polyoxyethylene Ether 5% ethylene glycol 1.2% Attapulgite 0.8% silica Replenish the remaining amount of corn oil; Preparation method: According to the formulation ratio in the example, the active ingredient, surfactant and other functional additives are placed in the reaction vessel in sequence, mixed evenly with oil, and then subjected to high-speed shearing and sand milling. Finally, the product is obtained by homogenization and filtration to obtain the dispersible oil suspension product. Example

[0013] 22% Benpyrazosulfuron·Flavoxam Suspension Concentrate (12+10) Formula composition: 12% Benpyrazosulfuron 10% cyclohexane 3% phosphate salt 1.5% Sodium Lignosulfonate 3% polycarboxylate 3.5% Fatty Alcohol Polyoxyethylene Ether 0.25% xanthan gum 5% glycerin 0.8% Magnesium Aluminum Silicate 0.5% silicone defoamer 0.2% methylparaben Add deionized water to make up the remaining amount; Preparation method: According to the formulation ratio in the example, the active ingredient, surfactant and other functional additives are placed in the reaction vessel in sequence, mixed evenly with oil, and then subjected to high-speed shearing, wet sand milling and finally homogenized filtration to obtain the suspension product. Example

[0014] 50% Benpyrazosulfuron-methyl·Zanthoxysulfuron-methyl water-dispersible granules (25+25) Formula composition: 25% Benpyrazosulfuron 25% clodinafop-propargyl 5.5% Sodium Alkyl Sulfonate 1.5% Alkylphenol Polyoxyethylene Ether Phosphate Salt 4.5% Sodium Lignosulfonate 7.5% polycarboxylate 5% ammonium sulfate 2.5% glucose Kaolin is used to make up the remaining amount; Preparation method: According to the standard formula ratio, the active ingredients are added to the carrier, along with surfactants and other functional additives. After mixing, the mixture is pulverized by air jet milling, and then an appropriate amount of water is added. Finally, the mixture is kneaded, granulated, dried, and sieved to obtain a water-dispersible granule product.

[0015] Test Basis: The test was conducted in accordance with NY / T 1155.4-2006 "Guidelines for Indoor Bioassay Tests of Pesticides - Herbicides Part 3: Activity Assay Tests - Foliar Spray Method"; Experimental targets: ryegrass, Japanese wild oats, shepherd's purse, and speedwell; Instruments and equipment: light incubator, quantitative spray equipment, electronic balance, pots and pans, pipettes, etc.; Test soil: The test used air-dried loam with organic matter content ≤3%, neutral pH, good aeration, and sieved. Test materials: The test soil was filled to 4 / 5 of the pot, and then watered from the bottom of the pot until the soil was completely saturated.

[0016] Pretreated weed seeds were evenly sown on the soil surface and covered with 0.5cm to 2cm of soil depending on the size of the seeds. After sowing, the seeds were transferred to a greenhouse for conventional cultivation and watered by bottom irrigation. After the weeds emerged, thinning was carried out to ensure uniform weed density.

[0017] Preparation of the drug: Dissolve the above raw materials in DMF to prepare a 2.5% stock solution, and then dilute it with a 0.1% Tween 80 aqueous solution; Chemical treatment: Spray treatment was carried out according to the experimental design, from low to high doses. Each treatment was replicated four times, and a control group without the chemical treatment was included. After treatment, the surface of the test materials was allowed to air dry naturally before being transferred to a greenhouse for routine cultivation. Experimental investigation: After treatment, the weed control effect of each treatment was observed regularly. After 14 days, the fresh weight of the surviving plants was investigated using the absolute value survey method, and the control effect was calculated.

[0018] Fresh weight control efficacy E = (fresh weight of control area - fresh weight of treatment area) × 100 / fresh weight of control area The theoretical protective efficacy of the mixed formulation is E0 = A + BA * B / 100 In the formula, A represents the efficacy of herbicide I at a dosage of P; B indicates the efficacy of herbicide II at a dosage of Q; E0 represents the theoretical fresh weight efficacy when the dosage of the mixture (Ⅰ+Ⅱ) is (P+Q). E represents the actual freshness control efficacy of each treatment.

[0019] Evaluation criteria for the combined effects of mixed drugs: E-E0 > 10% indicates a synergistic effect, E-E0 < -10% indicates an antagonistic effect, and E-E0 between ±10% indicates a synergistic effect.

[0020] Experimental results: The results in Tables 1-4 show that bensulfuron-methyl and clopyralid have good indoor activity against common weeds such as ryegrass, Japanese wild oats, shepherd's purse, and speedwell. The mass ratios of bensulfuron-methyl to clodinafop-propargyl at 1:2, 1:6, 1:12, 4:2, 4:6, 4:12, 4:18, 8:2, 8:6, 8:12, 8:18, 16:2, 16:6, 16:12, and 16:18 all showed a synergistic effect on the control of Lernus rubra, Alopecurus japonicus, Capsella bursa-pastoris, and Veronica persica. The mass ratios of bensulfuron-methyl to clodinafop-propargyl at 1:2, 1:6, 1:12, 1:18, 4:2, 4:6, 4:12, 4:18, 8:2, 8:6, 8:12, 8:18, 16:2, 16:6, 16:12, and 16:18 all showed a synergistic effect on the control of Veronica persica.

[0021]

[0022]

[0023]

[0024]

[0025] Field efficacy trials: The experiment was conducted in accordance with the "Guidelines for Field Efficacy Testing of Pesticides" (GB / T17980.42-2004). Experimental location: Wheat planting area in Zhongzhuangfu Village, Laixi City, Shandong Province; Crop: Tobacco Farmer 999; Experimental field: Wheat field; Weed situation in the experimental field: In previous years, it was mostly caused by a mixture of ryegrass, wild oats, wild wheatgrass, wild oats, shepherd's purse, shepherd's purse, and watercress. Experimental design: The experimental plots were arranged in a randomized block design, with a total of 5 treatments and 1 water control (Table 5), and each plot area was 20m². 2 Each treatment was repeated 4 times, for a total of 24 cells.

[0026] Test reagents and dosages:

[0027] Application method: Foliar spray; use a backpack sprayer with a fan-shaped nozzle.

[0028] Survey Methods: The absolute value survey method was used. Four sampling points were randomly selected for each treatment at 20 days and 40 days after drug administration, with each sampling point being 0.25m in diameter. 2 The first investigation focused on the efficacy of the control measures; the second investigation simultaneously focused on the fresh weight and quality.

[0029] Calculation method: 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% Data processing was performed using DPS, and statistical analysis was conducted using Duncan's New Multiple Range (DMRT) method.

[0030] Experimental results: Field efficacy trials showed that both bensulfuron-methyl and clodinafop-propargyl had good control effects on weeds in wheat fields. The effective dosage of 22% bensulfuron-methyl·clodinafop-propargyl suspension concentrate (12+10) was 30, 45, and 60 gai / hm². 2 The control efficacy against common weeds in the experimental field was good, and better than that of other treatments.

[0031]

[0032] Yield increase rate survey: During the trial, the yield and yield increase rate were observed and investigated at the harvest period. The results showed that the treatment with 22% bensulfuron-methyl·clopyralid suspension (12+10) could significantly increase the yield of wheat.

[0033]

[0034] In summary, the composition of the present invention is a combination of bensulfuron-methyl and clodinafop-methyl. Its activity and herbicidal effect are not simply the sum of the activities of each component. Compared with existing single formulations, it has significant control effect on plots with mixed occurrences of various grass and broadleaf weeds, can delay the development of weed resistance, has low pesticide residue, good safety, and meets the safety requirements of pesticide formulations.

[0035] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, 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 fall 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 and active ingredient B, wherein active ingredient A is bensulfuron-methyl and active ingredient B is clodinafop-propargyl; the mass ratio of bensulfuron-methyl to clodinafop-propargyl is 1:18 to 18:

1.

2. The herbicidal composition according to claim 1, characterized in that, The mass ratio of active ingredient A to active ingredient B is 1:18 to 8:1; preferably, the mass ratio of bensulfuron-methyl to cyclophosphamide is 1:12 to 8:

1.

3. The herbicidal composition according to claim 1, characterized in that, The mass ratio of bensulfuron-methyl to cyclohexane is 1:2, 1:6, 1:12, 1:18, 4:2, 4:6, 4:12, 4:18, 8:2, 8:6, 8:12, 8:18, 16:2, 16:6, 16:12, 16:18; Preferably, the mass ratio of bensulfuron-methyl to cyclophosphamide is 1:2, 1:6, 1:12, 4:2, 4:6, 4:12, 4:18, 8:2, 8:6, 8:12, 8:18, 16:2, 16:6, 16:12, or 16:

18.

4. The herbicidal composition according to claim 1, characterized in that, The active ingredients A and B in the herbicidal composition have a mass percentage content of 1-90%; Preferably, the mass percentage of active ingredients A and B in the herbicidal composition is 10-80%.

5. 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.

6. The herbicidal composition according to claim 1, characterized in that, The herbicidal composition can be prepared into agriculturally permissible formulations.

7. The herbicidal composition according to claim 1, characterized in that, The dosage forms are soluble concentrates, suspension concentrates, water-dispersible granules, and dispersible oil suspensions.

8. The application of the herbicidal composition according to claim 1 in controlling weeds in crop fields, characterized in that, The crop in question is wheat.

9. The application according to claim 8, characterized in that, The weeds mentioned are ryegrass, Japanese wild oats, shepherd's purse, and speedwell.

10. The application according to claim 8, characterized in that, The herbicidal composition is applied to unwanted plants or their growing areas.

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