A herbicidal composition and use thereof

Abstract

This invention belongs to the field of pesticide weeding technology and discloses a weeding composition and its application. The weeding composition contains active ingredient A and active ingredient B. Active ingredient A is icafolin, and active ingredient B is any one of bensulfuron-methyl, butachlor, and pretilachlor. The mass ratio of active ingredient A to active ingredient B is 1:1 to 1:40. The weeding composition has excellent control effect on weeds in paddy fields and is safe for crops.

Description

Technical Field

[0001] This invention belongs to the field of pesticide weeding technology, and discloses a weeding composition and its application. Background Technology

[0002] Rice is one of my country's most important food crops, and due to its large population, my country ranks first in the world in rice consumption. Currently, the main weeds that commonly occur in rice paddies are grasses, purslane, alisma, sedges, and asteraceae.

[0003] The main characteristics of weeds are their strong adaptability to adverse environments, high reproductive and regeneration capacity, ability to emerge at different times, vigorous growth that can inhibit the growth of major cultivated crops, and strong ability to spread. Rice paddy weeds not only affect the quality and yield of rice, but also impact the ecological environment by spreading pests and diseases, ultimately threatening human safety. Herbicides, on the other hand, offer advantages such as labor saving, time saving, high efficiency, and speed, making them an important measure to improve labor productivity and develop efficient and high-quality agriculture. They are also the most important means in the integrated management strategy for rice paddy weeds.

[0004] Although a relatively large variety of herbicides are used in paddy fields, alternating their use and using mixtures have delayed the development of resistance to some extent. However, with the increase in the amount of herbicides used in China, especially pesticides with declining efficacy, their continued large-scale use has led to the occurrence of resistant weeds.

[0005] To address the current problems of poor herbicide efficacy, resistance, and phytotoxicity, it is essential to scientifically select herbicides with appropriate spectrum of action based on the types of weeds found in paddy fields. Secondly, the use of compound herbicides can effectively broaden the spectrum of action and reduce the amount of herbicide used. The applicant's research has found that a reasonable compounding of icafolin with any of the following herbicides—benzyl thiamethoxam, butachlor, or pretilachlor—provides excellent control of common weeds in paddy fields. Summary of the Invention

[0006] Based on the above, the purpose of this invention is to provide a herbicidal composition that has excellent control effect on weeds in paddy fields. This herbicidal composition is safe for rice, has good fast-acting properties, and a long-lasting effect.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a herbicidal composition comprising active ingredient A and active ingredient B, wherein active ingredient A is icafolin, and active ingredient B is any one of bensulfuron-methyl, butachlor, or pretilachlor, and the mass ratio of active ingredient A to active ingredient B is 1:1 to 1:40, or any value within the above range.

[0008] Furthermore, the mass ratio of active ingredient A to active ingredient B is 3:5 to 3:100, or any value within the above range.

[0009] Furthermore, the active ingredient B is benzyl sulfadiazine, and the mass ratio of active ingredient A to active ingredient B is 1:2 to 1:32, or any value within the above range.

[0010] Furthermore, the active ingredient B is benzthiamethoxam, and the mass ratio of active ingredient A to active ingredient B is 15+120 (1:8), 15+240 (1:16), 15+480 (1:32), 30+120 (1:4), 30+240 (1:8), 30+480 (1:16), 60+120 (1:2), 60+240 (1:4), 60+480 (1:8), or any value within the above range;

[0011] Furthermore, the active ingredient B is butachlor, and the mass ratio of active ingredient A to active ingredient B is 12:25 to 3:50, or any value within the above range.

[0012] Furthermore, the active ingredient B is butachlor, and the mass ratio of active ingredient A to active ingredient B is 15+125 (3:25), 15+250 (3:50), 30+125 (6:25), 30+250 (3:25), 30+500 (3:50), 60+125 (12:25), 60+250 (6:25), 60+500 (3:25), or any value within the above range;

[0013] Furthermore, the active ingredient B is pretilachlor, and the mass ratio of active ingredient A to active ingredient B is 3:5 to 3:80, or any value within the above range.

[0014] Furthermore, the active ingredient B is pretilachlor, and the mass ratio of active ingredient A to active ingredient B is 15+100 (3:20), 15+200 (3:40), 15+400 (3:80), 30+100 (3:10), 30+200 (3:20), 30+400 (3:40), 60+100 (3:5), 60+200 (3:10), 60+400 (3:20), or any value within the above range;

[0015] Furthermore, in addition to the active ingredient, the herbicidal composition also contains pesticide-permitted auxiliary ingredients, which are one or more of the following: wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoamers, solvents, preservatives, stabilizers, synergists, binders, fillers, or carriers.

[0016] 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

[0017] 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

[0018] 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

[0019] Further, the thickener is one or more selected from xanthan gum, organobentonite, gum arabic, sodium alginate, magnesium aluminum silicate, carboxymethyl cellulose, and silica; and / or

[0020] 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

[0021] Furthermore, the antifreeze is one or more selected from alcohols, alcohol ethers, chlorinated hydrocarbons, and inorganic salts; and / or

[0022] 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

[0023] 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

[0024] 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

[0025] Furthermore, the synergist is selected from synergistic phosphorus, synergistic ether; and / or

[0026] Furthermore, the filler is a solvent, filler, or carrier;

[0027] 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

[0028] 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.

[0029] Furthermore, the herbicidal composition is prepared into a pesticide-permitted formulation, wherein the formulation is a suspension concentrate, emulsifiable concentrate, water-dispersible granule, wettable powder, granule, emulsifiable concentrate, microemulsion, water-in-oil emulsion, suspension concentrate, soluble concentrate, or dispersible oil suspension.

[0030] Furthermore, the formulation is a water flotation agent, emulsifiable concentrate, water-dispersible granule, wettable powder, or granule.

[0031] The present invention also discloses the application of the herbicidal composition described above for controlling unwanted plants.

[0032] Furthermore, the unwanted plant growing location is a rice paddy;

[0033] Furthermore, the unwanted plants are grass weeds, broadleaf weeds, or sedge weeds;

[0034] Furthermore, the herbicidal composition is applied to unwanted plants or their growing areas.

[0035] The beneficial effects of this invention are as follows:

[0036] 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 rice. It effectively reduces the amount of pesticides used and improves economic benefits. Detailed Implementation

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the formulation preparation examples and specific examples. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0038] The preparation examples prepared below have all met the quality and technical indicators required for the corresponding preparations after testing, and the resulting preparations are qualified preparations recognized in this field.

[0039] Preparation Example 1: 52% icafolin·benzyl thiamethoxam wettable powder (3:10)

[0040] Formula composition: 12% icafolin, 40% benzyl sulfadiazine, 2% sodium succinate sulfonate, 8% sodium lignin sulfonate, 3% naphthalene sulfonate formaldehyde condensate, kaolin to make up the balance;

[0041] Preparation method: According to the formula ratio, the active ingredients, dispersant, wetting agent and filler are mixed and stirred evenly in a stirring tank. The mixture is then pulverized and mixed evenly multiple times by an air jet mill to prepare the wettable powder of the composition of the present invention.

[0042] Preparation Example 2: 17% icafolin·benzyl thiamethoxam granules (2:15)

[0043] Formula composition: 2% icafolin, 15% benzyl sulfadiazine, 5% sodium naphthalenesulfonate, 3% potassium humate, 12% silica, 3% carboxymethyl cellulose, and diatomaceous earth to make up the balance.

[0044] Preparation method: According to the formula ratio, the active ingredients, dispersants and additives are pulverized and mixed evenly to make a master powder. The master powder and the carrier are added together into a coating granulator and stirred. While stirring, the prepared binder aqueous solution is added. After being fully mixed, the material is discharged, dried and sieved to obtain the granules of the present invention.

[0045] Preparation Example 3: 62% icafolin·benzyl thiamethoxam water-dispersible granules (1:30)

[0046] Formula composition: 2% icafolin, 60% benzyl oxychloride, 8% sodium lignosulfonate, 4% BX (a type of oxychloride), 6% sodium polycarboxylate, 6% white sugar, and kaolin to make up the balance.

[0047] Preparation method: According to the formula ratio, add the active ingredients to the carrier, and add surfactants and other functional additives to it. Mix, and after air jet pulverization, add 10-25% water. Then knead, granulate, dry and sieve to obtain water-dispersible granules; or spray water, granulate and dry the pulverized powder in a fluidized bed granulator, and then sieve to obtain the product.

[0048] Preparation Example 4: 31% icafolin·butachlor wettable powder (6:25)

[0049] Formula composition: 6% icafolin, 25% butachlor, 8% tea saponin, 5% BX (a type of chemical compound), 3% alkyl aryl polyoxyethylene ether polyoxypropylene ether, 25% silica, and kaolin to make up the balance.

[0050] Preparation method: Same as in preparation example 1.

[0051] Preparation Example 5: 0.23% icafolin·butachlor granules (2:21)

[0052] Formula composition: 0.02% icafolin, 0.21% butachlor, 5% sodium lignosulfonate, 2% naphthalenesulfonate formaldehyde condensate, 3% sodium alginate, and bentonite to make up the balance.

[0053] Preparation method: Same as in preparation example 2.

[0054] Preparation Example 6: 17% icafolin·butachlor EC (1:16)

[0055] Formula composition: 1% icafolin, 16% butachlor, 15% DMF, 14% styrene-phenol polyoxyethylene ether, 2% calcium dodecylbenzenesulfonate, 20% propylene carbonate, balance xylene.

[0056] Preparation method: According to the formula ratio, the measured active ingredients, solvents and co-solvents are added to the mixing tank and stirred to dissolve them. Then, the emulsifier is added, and the remaining solvent is used to make up the balance. The mixture is stirred evenly in the mixing tank and filtered to obtain the emulsifiable oil required by the present invention.

[0057] Preparation Example 7: 48% icafolin·pretilachlor emulsion (3:5)

[0058] Formula composition: 18% icafolin, 30% pretilachlor, 6% EO-PO block copolymer, 12% cyclohexanone, 0.2% xanthan gum, 5% glycerol, 3% urea, 0.5% sodium benzoate, 0.2% silicone defoamer, deionized water to make up the balance.

[0059] Preparation method: According to the formula ratio, the surfactant, antifreeze and other ingredients are mixed with water to form an aqueous phase. Then, the active ingredient is dissolved in a solvent and added to the aqueous phase under stirring. After stirring evenly, the thickener and preservative are added and shearing is continued for 10 minutes. Finally, the defoamer is added and stirred evenly to form an O / W type water emulsion.

[0060] Preparation Example 8: 33% icafolin·pretilachlor EC (2:31)

[0061] Formula composition: 2% icafolin, 31% pretilachlor, 10% dimethyl sulfoxide, 12% fatty alcohol polyoxyethylene ether, 2% calcium dodecylbenzenesulfonate, 18% propylene carbonate, xylene to make up the balance.

[0062] Preparation method: Same as in preparation example 6.

[0063] Preparation Example 9: 26% icafolin·pretilachlor wettable powder (1:25)

[0064] Formula composition: 1% icafolin, 25% pretilachlor, 7% sodium lignosulfonate, 5% dispersant NNO, 2% sodium dodecyl sulfate, 15% silica, and kaolin to make up the balance.

[0065] Preparation method: Same as in preparation example 1.

[0066] Example 1: Indoor bioassay experiment.

[0067] Test basis: The test refers to NY / T-1155.5-2006 "Guidelines for Indoor Bioassay of Pesticides - Herbicides Part 5: Soil Activity Test of Herbicides in Paddy Fields"; NY / T 1155.7-2006 "Guidelines for Indoor Bioassay of Pesticides - Herbicides Part 7: Determination of Combined Effects of Mixtures".

[0068] Experimental targets: barnyard grass, Echinochloa crus-galli, Crataegus pinnatifida, Sagittaria sagittifolia, Commelina communis, Chrysanthemum indicum, Cyperus difformis, Cyperus rotundus.

[0069] Test pesticides: icafolin technical grade, bensulfuron technical grade, butachlor technical grade, and pretilachlor technical grade.

[0070] Test material preparation: Fill a pot with a measured amount of air-dried sandy loam soil to 3 / 4 full, then pour water from the top of the pot until the soil is completely saturated. Sow the test weed seeds evenly and in measured amounts on the soil surface, and cover with 0.5cm to 2cm of soil depending on the size of the seeds.

[0071] Reagent preparation: Dissolve the test reagent in a suitable solvent and then dilute it with a 0.1% Tween 80 aqueous solution.

[0072] Chemical treatment: Before treatment, the sample was irrigated to maintain a water layer of 1-2 cm. Using a pipette, a measured amount of the chemical was applied to the sample according to the experimental design, from low to high doses. Each treatment was replicated four times, with a control group containing no chemical. After treatment, the sample was transferred to a greenhouse for cultivation, maintaining a water layer of 1-2 cm throughout the experiment.

[0073] Experimental investigation: After treatment, weed emergence and post-emergence growth were observed and recorded visually at regular intervals. Weed control activity was investigated and recorded using the absolute value method 14 days after treatment.

[0074] Absolute value survey method: Based on the survey data, calculate the fresh weight efficacy of each treatment using the following formula.

[0075] Fresh weight control efficacy E = (Fresh weight of control area - Fresh weight of treatment area) × 100 / Fresh weight of control area

[0076] Data statistics and analysis:

[0077] The experiment used the Gowing method:

[0078] Theoretical control efficacy E0 of the mixture = 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

[0079] Evaluation criteria for the combined effects of mixed drugs:

[0080] E-E0 > 10% indicates a synergistic effect, E-E0 < -10% indicates an antagonistic effect, and E-E0 between ±10% indicates an additive effect.

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[0093] Example 2: Field efficacy trial.

[0094] Experimental basis: The experiment was conducted in accordance with GB / T 17980.40-2000 "Field Efficacy Test Guidelines for Pesticides (I) Herbicides for the Control of Weeds in Rice Fields".

[0095] Experimental Location: This experiment was conducted in a rice experimental field in Linze Town, Gaoyou City, Jiangsu Province. The rice variety planted in the experimental field was Huai Dao No. 3, and the previous crop was wheat. All experimental plots had uniform cultivation conditions, and the cultivation practices in the experimental field were in line with local production realities.

[0096] Experimental cell arrangement: The experimental cells were arranged in a randomized block layout, with each cell having an area of ​​30m². 2 Each residential area has its own separate irrigation system, preventing water from mixing or seeping between different areas.

[0097] Application time and method: Apply the pesticide 10 days after rice transplanting. Use the two-stage dilution method. Mix 20 kg of pesticide with moist fine soil per hectare and spread it evenly. When applying the pesticide, the water layer in the field should be 3-5 cm. Keep the water level for 5-7 days after the pesticide is applied.

[0098] Survey Method: The absolute value survey method was used, with 4 random sampling points in each community, each point 1m long. 2 A sampling survey was conducted. The number of weeds was surveyed on the 14th day after application of the pesticide, and the number of weeds and their fresh weight were surveyed on the 30th day.

[0099] Yield determination: The experiment was conducted after the rice matured, and the actual yield of each plot was measured and converted into yield per hectare.

[0100] Methods for calculating efficacy and yield:

[0101] Prevention and control efficacy (%) = (CK - PT) / CK × 100

[0102] In the formula: CK is the number of weeds in the control area; PT is the number of weeds in the treatment area.

[0103] Yield increase rate (%) = (Production in treatment area - Production in control area) / Production in control area × 100

[0104] Experimental results and analysis:

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[0108] Field efficacy trials have shown that the herbicidal composition of this invention has good control effects on common weeds in rice paddies. The results indicate that applying the compound formulation of this invention to transplanted rice fields is highly effective, long-lasting, broad-spectrum, and safe, while also saving labor and costs. A single application at a reasonable dosage can effectively control weed damage. These results provide sufficient evidence for the large-scale application of the herbicidal composition of this invention in production. In production, it is recommended to mix the herbicidal composition of this invention with fertilizer or soil and apply it 5-7 days after rice transplanting, maintaining a water level of 3-5 cm in the field, and keeping the field moist for 5-7 days after application. The dosage can be adjusted according to local rice growth, soil fertility, and weed population and quantity.

[0109] Although the present invention has been described in detail above with general description and specific embodiments, some modifications or improvements can be made to it based on the present invention, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention are within the scope of protection claimed by the present invention.

Claims

1. A herbicidal composition, characterized in that, The herbicidal composition comprises active ingredient A and active ingredient B, wherein active ingredient A is icafolin and active ingredient B is any one of bensulfuron-methyl, butachlor, or pretilachlor; wherein active ingredient B is bensulfuron-methyl, and the mass ratio of active ingredient A to active ingredient B is 1:2 to 1:

32. The active ingredient B is butachlor, and the mass ratio of active ingredient A to active ingredient B is 12:25 to 3:

50. The active ingredient B is pretilachlor, and the mass ratio of active ingredient A to active ingredient B is 3:5 to 3:

80.

2. The herbicidal composition according to claim 1, characterized in that, The active ingredient B is benzyl sulfadiazine, and the mass ratio of active ingredient A to active ingredient B is 1:2, 1:4, 1:8, 1:16, or 1:

32. The active ingredient B is butachlor, and the mass ratio of active ingredient A to active ingredient B is 12:25, 6:25, 3:25, or 3:

50. The active ingredient B is pretilachlor, and the mass ratio of active ingredient A to active ingredient B is 3:5, 3:10, 3:20, 3:40, or 3:

80.

3. The herbicidal composition according to claim 1, characterized in that, In addition to the active ingredient, the herbicidal composition also contains pesticide-permitted auxiliary ingredients, which are one or more of the following: wetting agents, dispersants, emulsifiers, thickeners, disintegrants, antifreeze agents, defoamers, solvents, preservatives, stabilizers, synergists, binders, and fillers.

4. The herbicidal composition according to claim 1, characterized in that, The herbicidal composition is prepared into a pesticide-permitted formulation, wherein the formulation is a suspension concentrate, water-dispersible granule, wettable powder, granule, emulsifiable concentrate, microemulsion, water-in-oil emulsion, suspension concentrate, soluble concentrate, or dispersible oil suspension.

5. The herbicidal composition according to claim 4, characterized in that, The formulations are water flotation agents, emulsifiable concentrates, water-dispersible granules, wettable powders, and granules.

6. The herbicidal composition according to any one of claims 1-5 for the control of unwanted plants.

7. The application according to claim 6, characterized in that, The unwanted plant growing location is a rice paddy.

8. The application according to claim 6, characterized in that, The unwanted plants are grass weeds, broadleaf weeds, or sedge weeds.

9. The application according to claim 6, characterized in that, The herbicidal composition is applied to unwanted plants or their growing areas.

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