Weeding composition and application thereof

Abstract

The invention belongs to the technical field of weeding, and discloses a weeding composition and application thereof. The weeding composition comprises an active component A, an active component B and an active component C. The active component A is penoxsulam, the active component B is bensulfuron methyl, the active component C is anilofos, and the mass ratio of the active component A to the active component B to the active component C is (1-50): (1-50): (1-150). The weeding effect of the composition is stable, and the weeding effect is good. The weeding composition has the advantages that the dosage is reduced, the pesticide cost is reduced, the influence degree on the environment is reduced, the weed control spectrum is expanded, and the weeding composition has a good control effect on weeds in paddy fields.

Description

Technical Field

[0001] The invention belongs to the technical field of agricultural weeding, and specifically discloses a weeding composition and application thereof. Background Art

[0002] Penoxsulam is a triazolopyrimidine sulfonamide ALS inhibitor developed by Dow AgroSciences in the United States. It inhibits the activity of acetolactate synthase (ALS), hinders the production of valine, isoleucine and leucine in plants, thereby affecting protein synthesis in plants and inhibiting cell division, causing plant tissues to lose green, turn yellow and eventually die. It can effectively prevent and control a variety of weeds.

[0003] Bensulfuron-methyl belongs to the sulfonylurea herbicide and is a selective systemic herbicide. Developed by DuPont, its English common name is bensulfuron-methyl. This herbicide can effectively control most broadleaf weeds and some sedges in rice fields. It is also very safe for rice, has no soil residue, and does not affect subsequent crop rotation. However, its control effect on grasses is very poor.

[0004] Cypermethrin is a thiophosphate herbicide, which is a systemic selective herbicide. The agent is absorbed by the root system and transmitted to the young shoots or leaves. After the weeds are treated, their growth stops, the leaves turn dark green, become shorter and thicker, and are very easy to break. The heart leaves are difficult to pull out, and the whole plant dies in the end. It is used to control annual grass weeds and sedges in rice fields, such as barnyard grass, rice barnyard grass, Leptochloa chinensis, Cyperus rotundus, Cyperus difformis, Duck tongue grass, Fernleaf grass, Knotweed, and Flying grass.

[0005] Mixing of different types of herbicides has a wide spectrum of weed control, which can effectively improve the actual control effect, reduce the amount of medicine used, and reduce costs. The long-term use of a single herbicide causes changes in the weed community in rice fields, and weeds are one of the key factors affecting rice yield and quality. Artificial weed control is not only time-consuming and labor-intensive, but also increases production costs, so chemical herbicides are widely used. In recent years, with the changes in the resistance of rice field weeds and population stability, the rice field weeds that were originally in a disadvantageous position have gradually become malignant weeds with obvious advantages and harm. There are more and more herbicides on the market, and often the weed control effect is poor or even causes pesticide damage due to improper selection of agents or application techniques. Therefore, it is extremely important to screen out efficient, safe, and low-residue herbicides. The present invention surprisingly found through a large number of indoor biological activity tests and field tests that the three agents of penoxsulam, benzylsulfuron-methyl and safiophos can effectively control various common weeds in rice fields, and have good quick-acting properties and a long lasting effect.

[0006] In the prior art, binary mixed herbicidal compositions of penoxsulam and bensulfuron-methyl, penoxsulam and safiophos, and bensulfuron-methyl and safiophos are disclosed. There are also ternary mixed compositions of penoxsulam and bensulfuron-methyl, penoxsulam and safiophos, and bensulfuron-methyl and safiophos and other herbicides. However, there is no literature or patent disclosure on the use of a ternary mixture of penoxsulam, bensulfuron-methyl and safiophos for controlling weeds in rice fields. Summary of the invention

[0007] The purpose of the present invention is to solve the problems of the prior art that herbicides used in rice fields have a small weed control spectrum, poor control effect, large dosage and serious environmental harm, and to provide a weed control composition with reasonable components, expanded weed control spectrum, safety and high efficiency, economy, environmental protection and not easy to produce resistance.

[0008] Another object of the present invention is to use the herbicidal composition and / or its formulation for controlling unwanted plants in rice fields, especially for controlling grass weeds, broadleaf weeds and / or sedge weeds in rice fields.

[0009] In order to achieve the above object, the present invention adopts the following technical scheme: a herbicidal composition, the herbicidal composition comprises active ingredient A, active ingredient B and active ingredient C, the active ingredient A is penoxsulam, the active ingredient B is benzylsulfuron-methyl, and the active ingredient C is safiophos.

[0010] Furthermore, the mass ratio of the active ingredient A to the active ingredient B to the active ingredient C is (1-50): (1-50): (1-150);

[0011] Furthermore, the mass ratio of the active ingredient A to the active ingredient B to the active ingredient C is (1-20):(1-20):(1-120).

[0012] Furthermore, the mass ratio of the active ingredient A to the active ingredient B to the active ingredient C is (1-10): (1-20): (1-120);

[0013] Furthermore, the mass ratio of the active ingredient A to the active ingredient B to the active ingredient C is (1-5): (1-8): (1-60);

[0014] Furthermore, when the mass ratio of the active ingredient A to the active ingredient B is compounded with the active ingredient C to exhibit synergistic effects, if they are enlarged or reduced in equal proportions, they are all synergistic effects and are within the protection ratio range of the present invention;

[0015] Furthermore, the mass ratio of the active ingredient A to the active ingredient B is 5+12+40 (1:2.4:8), 5+12+80 (1:2.4:16), 5+12+120 (1:2.4:24), 5+16+40 (1:3.2:8), 5+16+80 (1:3.2:16), 5+16+120 (1:3.2:24), 5+20+40 (1:4:8), 5+20 +80(1:4:16), 5+20+120(1:4:24), 10+12+40(1:1.2:4) / (5:6:20), 10+12+80(1:1.2:8) / (5:6:40), 10+12+120(1:1.2:12) / (5:6:60), 10+16+40(1:1.6:4) / (5:8:20), 10+16+80(1:1. 6:8) / (5:8:40), 10+16+120(1:1.6:12)(5:8:60), 10+20+40(1:2:4), 10+20+80(1:2:8), 10+20+120(1:2:12), 20+12+40(1:0.6:2) / (5:3:10), 20+12+80(1:0.6:4) / (5:3:20), 20+12+ 120(1:0.6:6) / (5:3:30), 20+16+40(1:0.8:2)(5:4:10), 20+16+80(1:0.8:4) / (5:4:20), 20+16+120(1:0.8:6) / (5:4:30), 20+20+40(1:1:2), 20+20+80(1:1:4), 20+20+120(1:1:6);

[0016] Furthermore, the mass ratio of the active ingredient A to the active ingredient B is 5+12+40 (1:2.4:8), 5+12+80 (1:2.4:16), 5+12+120 (1:2.4:24), 5+16+40 (1:3.2:8), 5+16+120 (1:3.2:24), 5+20+80 (1:4:16), 5+20+120 (1:4:24), 10+12+40 (1:1.2:4) / (5:6:20), 10+12+80 (1:1.2:8) / (5:6:40), 10+12+120 (1:1.2:12) / (5:6:60), 10+16+80 (1:1.6:8) / (5:8:40), 10+16+120(1:1.6:12)(5:8:60), 10+20+40(1:2:4), 10+20+80(1:2:8), 10+20+120(1:2:12), 20+12+120(1:0.6:6) / (5:3:30), 20+16+40(1:0.8:2)(5:4:10), 20+16+80(1:0.8:4) / (5:4:20), 20+16+120(1:0.8:6) / (5:4:30), 20+20+40(1:1:2), 20+20+120(1:1:6);

[0017] Furthermore, the sum of the weights of the active ingredients accounts for 0.01 to 80% of the total weight of the herbicidal composition;

[0018] Furthermore, the total weight of active ingredients in the herbicidal composition accounts for 0.1 to 70% of the total weight of the herbicidal composition.

[0019] Furthermore, the herbicidal composition contains pesticide formulation auxiliary ingredients in addition to the active ingredients to prepare a formulation form permitted in agriculture;

[0020] The auxiliary component is selected from one or more of a wetting agent, a dispersant, an emulsifier, a thickener, a disintegrant, an antifreeze agent, a defoaming agent, a solvent, a preservative, a stabilizer, a synergist or a carrier;

[0021] Further, the dispersant is selected from a mixture of one or more of polycarboxylates, lignin sulfonates, alkylphenol polyoxyethylene ether formaldehyde condensate sulfates, alkylbenzene sulfonate calcium, naphthalenesulfonic acid formaldehyde condensate sodium salts, alkylphenol polyoxyethylene ethers, fatty amine polyoxyethylene ethers, fatty acid polyoxyethylene ethers or glycerol fatty acid ester polyoxyethylene ethers;

[0022] Further, the emulsifier is selected from calcium alkylbenzene sulfonate, OP series phosphate (nonylphenol polyoxyethylene ether phosphate), phenylphenol polyoxyethylene ether phosphate, styrene polyoxyethylene ether ammonium sulfate, alkyl biphenyl ether disulfonic acid magnesium salt, triethanolamine salt, benzyl dimethylphenol polyoxyethyl ether, alkylphenol formaldehyde resin polyoxyethyl ether, phenethylphenol formaldehyde resin polyoxyethyl ether, phenethylphenol polyoxyethyl polypropylene ether, ethylene oxide-propylene oxide block copolymer, OP series (nonylphenol polyoxyethylene ether), castor oil polyoxyethylene ether, alkylaryl polyoxyethylene polyoxypropylene ether, sorbitan monostearate, sorbitan fatty acid ester polyoxyethylene ether or fatty alcohol polyoxyethylene ether. One or more of the mixture;

[0023] Furthermore, the thickener is selected from a mixture of one or more of xanthan gum, polyvinyl alcohol, bentonite, carboxymethyl cellulose or magnesium aluminum silicate;

[0024] Furthermore, the disintegrant is selected from a mixture of one or more of bentonite, urea, ammonium sulfate, aluminum chloride, low-substituted hydroxypropyl cellulose, lactose, citric acid, succinic acid or sodium bicarbonate;

[0025] Furthermore, the antifreeze agent is selected from a mixture of one or more of ethylene glycol, propylene glycol, glycerol or urea;

[0026] Furthermore, the defoaming agent is selected from silicone oil, silicone compounds, C 10 ~C 20 Saturated fatty acid compounds or C8~C 10 A mixture of one or more fatty alcohol compounds;

[0027] Further, the solvent is selected from a mixture of one or more of N,N-dimethylformamide, cyclohexanone, butyl ether, xylene, dimethyl sulfoxide, methanol, ethylene glycol, ethanol, propanol, butanol, trimethylcyclohexanone, N-octyl pyrrolidone, toluene, ethanolamine, triethanolamine, isopropylamine, N-methyl pyrrolidone, diethylene glycol, ethylene glycol methyl ether, ethyl acetate or acetonitrile;

[0028] Furthermore, the stabilizer is selected from a mixture of one or more of epoxy soybean oil, epichlorohydrin, BHT, ethyl acetate, and triphenyl phosphate;

[0029] Further, the penetrant is selected from a mixture of one or more of penetrant JFC, penetrant T, azone or silicone;

[0030] Furthermore, the carrier is one, two or three of a solvent or a filler, and water is preferably deionized water;

[0031] Furthermore, the filler is selected from a mixture of one or more of kaolin, diatomaceous earth, bentonite, attapulgite, white carbon black, starch or light calcium carbonate;

[0032] The above substances can all be obtained commercially;

[0033] Furthermore, the dosage form of the preparation is selected from solid preparations and / or liquid preparations;

[0034] The solid preparations include powders, granules, pellets, tablets, strips, wettable powders, oil-dispersible powders, emulsion powders, water-dispersible granules, emulsion granules, water-dispersible tablets, soluble powders, soluble tablets or soluble granules;

[0035] The liquid preparations include soluble solutions, soluble gels, oils, film-spreading oils, emulsifiable concentrates, latexes, dispersible solutions, ointments, aqueous emulsions, oil emulsions, microemulsions, lipid suspensions, microcapsule suspensions, oil suspensions, dispersible oil suspensions, suspoemulsions, microcapsule suspension-suspensions, microcapsule suspension-water emulsions or microcapsule suspension-suspoemulsions;

[0036] Furthermore, the solid preparation is selected from granules, water dispersible granules and / or wettable powders, and the liquid preparation is selected from emulsifiable concentrates, water emulsions and / or dispersible oil suspensions;

[0037] The present invention also discloses the use of the herbicidal composition as described above for controlling unwanted plants.

[0038] Further, the unwanted plant growth site is a rice field;

[0039] Further, the unwanted plants are grass weeds, broadleaf weeds and / or sedge weeds;

[0040] Furthermore, the grass weeds are barnyard grass, Leptochloa chinensis and / or rice lycopodiella, the broad-leaved weeds are Channa chussima, Duck tongue grass and / or Sagittaria sagittifolia, and the Cyperus weeds are Cyperus difformis and / or Cyperus sieboldii.

[0041] A method for using a herbicide, characterized in that the herbicide composition and / or its preparation is applied to the growth site of unwanted plants.

[0042] Beneficial effects of the present invention:

[0043] 1) The invention has reasonable components, stable weed control effect, wide weed control spectrum, improved control effect, and can control common grass weeds, broad-leaved weeds and sedge weeds in rice fields with one application;

[0044] 2) The composition of the present invention is low in toxicity, safe for rice growth and development, has a short residual time in rice and soil, and is safe for the environment;

[0045] 3) The composition of the present invention has a low dosage, can effectively delay drug resistance, and reduce agricultural production costs. DETAILED DESCRIPTION

[0046] In order to make those skilled in the art better understand the present invention, the technical solutions in the embodiments of the invention are described clearly and completely below. The embodiments described below are only preferred embodiments of the present invention and can be used to describe the present invention, and cannot be understood as limiting the scope of the present invention.

[0047] Preparation Example:

[0048] Preparation Example 1: 45.6% penoxsulam·bensulfuron-methyl·safiophos wettable powder (4:9.6:32)

[0049] Calculated by weight percentage, 4% penoxsulam, 9.6% benzylsulfuron-methyl, 32% safiophos, 10% sodium lignin sulfonate, 6% naphthalene sulfonate formaldehyde condensate, 5% dispersant NNO, 7% white carbon black, and kaolin make up the balance.

[0050] Preparation method: according to the formula ratio, the active ingredients, dispersants, wetting agents and fillers are mixed, stirred evenly in a stirring kettle, and crushed and mixed evenly for multiple times by a jet mill to prepare the wettable powder of the composition of the present invention.

[0051] Preparation Example 2: 0.57% penoxsulam·bensulfuron-methyl·safiophos granules (0.05:0.12:0.4)

[0052] Calculated by weight percentage, 0.05% penoxsulam, 0.12% benzylsulfuron-methyl, 0.4% safflower, 2% sodium lignin sulfonate, 3% potassium humate, 10% white carbon black, 2% carboxymethyl cellulose and quartz sand make up the balance.

[0053] Preparation method: According to the formula ratio, the coating granulation method is adopted to grind and mix the original drug, dispersant and auxiliary agent evenly to form a mother powder, add the mother powder and the carrier into a coating granulator and stir, add the prepared binder aqueous solution while stirring, mix well and then discharge the material, dry and sieve to obtain the granules of the present invention.

[0054] Preparation Example 3: 11.4% penoxsulam·bensulfuron-methyl·safamifo dispersible oil suspension (1:2.4:8)

[0055] Calculated by weight percentage, 1% penoxsulam, 2.4% benzylsulfuron-methyl, 8% safflower, 2% sodium lignin sulfonate, 8% alkylaryl polyoxyethylene polyoxypropylene ether, 1% alkylphenol polyoxyethylene ether, 1% calcium dodecylbenzene sulfonate, 1% sodium polycarboxylate, 1% silicon dioxide, 1% organic bentonite, 20% soybean oil, and methyl oleate make up the balance.

[0056] Preparation method: According to the formula ratio, the active ingredients, surfactants and other functional additives are placed in the reactor in sequence, oil is added and mixed evenly, and the dispersible oil suspension product is obtained by high-speed shearing, wet sand grinding, and finally homogenization filtration.

[0057] Preparation Example 4: 8% penoxsulam·bensulfuron-methyl·safiophos EC (1:1:6)

[0058] Calculated by weight percentage, 1% penoxsulam, 1% benzylsulfuron-methyl, 6% thiamethoxam, 22% N-methylpyrrolidone, 13% styrylphenol polyoxyethylene ether, 3% calcium dodecylbenzenesulfonate, 22% propylene carbonate, and trimethylbenzene make up the balance.

[0059] Preparation method: according to the formula ratio, the measured active ingredients, solvents and co-solvents are added into a mixing kettle and stirred to dissolve, then an emulsifier is added, and the remaining solvent is used to make up the balance, and the mixture is stirred evenly in a stirring kettle, and filtered to obtain the emulsifiable concentrate required by the present invention.

[0060] Preparation Example 5: 24% penoxsulam·bensulfuron-methyl·safamidis water dispersible granules (3:3:18)

[0061] By weight percentage, 3% penoxsulam, 3% benzylsulfuron, 18% safflower, 12% sodium lignin sulfonate, 3% sodium dodecylbenzene sulfonate, 2% pulverized powder BX, 10% ammonium sulfate, and kaolin makes up the balance

[0062] Preparation method: according to the formula ratio, the active ingredient is added to the carrier, and the surfactant and other functional additives are added thereto, mixed, and after air flow grinding, 10-25% of water is added, and then the water-dispersible granule product is obtained by kneading, granulating, drying and sieving; or the crushed powder is sprayed with water in a boiling granulator, granulated, dried, and then sieved to obtain the product.

[0063] Preparation Example 6: 24.4% penoxsulam·bensulfuron-methyl·safamidophos dispersible oil suspension (2:6.4:16)

[0064] Calculated by weight percentage, 2% penoxsulam, 6.4% benzylsulfuron-methyl, 16% safflower, 3% fatty alcohol polyoxyethylene ether, 13% castor oil polyoxyethylene ether, 3% calcium dodecylbenzene sulfonate, 3% succinate sulfonates, 2% naphthalenesulfonate formaldehyde condensate, 2% organic bentonite, 20% 200# solvent oil, and methyl oleate make up the balance.

[0065] Preparation method: Same as Preparation Example 3.

[0066] Preparation Example 7: 12.2% penoxsulam·bensulfuron-methyl·safiophos EC (1:3.2:8)

[0067] Calculated by weight percentage, 1% penoxsulam, 3.2% benzylsulfuron-methyl, 8% safiophos, 8% dimethyl sulfoxide, 12% alkylphenol polyoxyethylene ether, 1% calcium dodecylbenzenesulfonate, 15% propylene carbonate, and xylene make up the balance.

[0068] Preparation method: Same as Preparation Example 4.

[0069] Preparation Example 8: 0.51% penoxsulam·bensulfuron-methyl·safiophos granules (0.05:0.06:0.4)

[0070] Calculated by weight percentage, 0.05% penoxsulam, 0.06% benzylsulfuron-methyl, 0.4% safiophos, 3% naphthalenesulfonate formaldehyde condensate, 5% sodium alginate, 1% polyacrylic acid, and urea granules make up the balance.

[0071] Preparation method: Same as Preparation Example 2.

[0072] Preparation Example 9: 6.2% penoxsulam·bensulfuron-methyl·safiophos granules (1:1.2:4)

[0073] Calculated by weight percentage, 1% penoxsulam, 1.2% benzylsulfuron-methyl, 2.4% safiophos, 10% sodium dodecylbenzenesulfonate, 2% polyvinylpyrrolidone, and bentonite make up the balance.

[0074] Preparation method: According to the formula ratio, the active ingredient, dispersant and carrier are crushed and mixed evenly to form a mother powder by extrusion granulation method, the mother powder is evenly stirred with the prepared binder aqueous solution, and then added to the extrusion granulator for extrusion granulation, and the granules of the present invention are obtained after drying and sieving.

[0075] Indoor activity test:

[0076] Example 1: Indoor activity test of penoxsulam, bensulfuron-methyl and cypermethrin mixed against common weeds in rice fields

[0077] Test basis: The test refers to NY / T 1155.9-2008 "Guidelines for Indoor Bioassay Tests of Pesticides - Herbicides Part 9: Paddy Field Herbicide Activity Determination Test Stem and Leaf Spray Method" and NY / T 1155.7-2006 "Guidelines for Indoor Bioassay Tests of Pesticides - Herbicides Part 7: Determination of Combined Action of Mixtures".

[0078] Test targets: Gramineae weeds include Echinochloa crus-galli and Leptochloa chinensis, broad-leaved weeds include Channa sphaerocephala and Sagittaria sagittifolia, and Cyperus difformis weeds include Cyperus difformis.

[0079] Test agents: 98% penoxsulam technical, 96% benzylsulfuron-methyl technical, 95% safiophos technical, all of which are provided by the Group's R&D Center.

[0080] Preparation of drugs: Dissolve and dilute the above original drugs with appropriate solvents. According to the activity of the drugs, 5 series of mass concentrations are set for the test drugs and the control drugs.

[0081] Experimental equipment: light incubator, controllable quantitative spray equipment, electronic balance, pots, beakers, and pipettes.

[0082] Test method: Fill the test soil to 4 / 5 of the pot, and use top watering to make the soil completely moist to saturation. Select mature and full weed seeds, sow a certain amount of weed seeds in the pots, keep the soil fully moist after sowing, move to the greenhouse for normal cultivation, and spray the weeds when they grow to the appropriate leaf stage.

[0083] Chemical treatment: spray treatments were carried out from low dose to high dose according to the experimental design, with 4 replicates for each treatment, and a treatment without chemical was set as a blank control. After treatment, the soil was kept fully moist and moved into the greenhouse for normal management.

[0084] Experimental investigation: Check and record the growth status of weeds regularly after treatment. Use the absolute value method to investigate the fresh weight of the aboveground part of each treatment 14 days after treatment, and calculate the fresh weight control effect of each treatment.

[0085] Calculation formula:

[0086]

[0087] Theoretical fresh weight control effect E0 (%) = 100 - [(100 - fresh weight control effect of herbicide A) × (100 - fresh weight control effect of herbicide B) × (100 - fresh weight control effect of herbicide C)] / 100 2

[0088] Evaluation criteria for the combined effect of mixed drugs: E-E0>10% is a synergistic effect, E-E0<10% is an antagonistic effect, and E-E0 between ±10% is an additive effect.

[0089] The indoor test results are shown in the table below.

[0090] Table 1: Indoor activity test of penoxsulam, benzylsulfuron-methyl and cypermethrin mixed with barnyardgrass

[0091]

[0092]

[0093] From the indoor test results in Table 1, it can be seen that the indoor activity test of penoxsulam, benzylsulfuron-methyl and safflower against barnyard grass is 5+12+40 (1:2.4:8), 5+12+80 (1:2.4:16), 5+12+120 (1:2.4:24), 5+16+40 (1:3.2:8), 5+16+80 (1:3.2:16), 5+16+120 (1:3.2:24), 5+20+80(1:4:16), 5+20+120(1:4:24), 10+12+40(1:1.2:4) / (5:6:20), 10+12+80(1:1.2:8) / (5:6:40), 10+12+120(1:1.2:12) / (5:6:60), 10+16+40(1:1.6:4) / (5:8:20), 10+16+80(1 :1.6:8) / (5:8:40), 10+16+120(1:1.6:12)(5:8:60), 10+20+40(1:2:4), 10+20+80(1:2:8), 10+20+120(1:2:12), 20+12+40(1:0.6:2) / (5:3:10), 20+12+80(1:0.6:4) / (5:3:20), 20+1 The combined effect on barnyard grass was synergistic when the dosage was 2+120(1:0.6:6) / (5:3:30), 20+16+40(1:0.8:2)(5:4:10), 20+16+80(1:0.8:4) / (5:4:20), 20+16+120(1:0.8:6) / (5:4:30), 20+20+40(1:1:2) and 20+20+120(1:1:6).

[0094] Table 2: Indoor activity test of penoxsulam, benzylsulfuron-methyl and cypermethrin mixed with Leptochloa chinensis

[0095]

[0096]

[0097] From the test results in Table 2, it can be seen that the indoor activity test of penoxsulam, benzylsulfuron-methyl and safflower-phosphorus mixed with Leptochloa chinensis is 5+12+40 (1:2.4:8), 5+12+80 (1:2.4:16), 5+12+120 (1:2.4:24), 5+16+40 (1:3.2:8), 5+16+80 (1:3.2:16), 5+16+12 0(1:3.2:24), 5+20+40(1:4:8), 5+20+80(1:4:16), 5+20+120(1:4:24), 10+12+40(1:1.2:4) / (5:6:20), 10+12+80(1:1.2:8) / (5:6:40), 10+12+120(1:1.2:12) / (5:6:60 )、10+16+80(1:1.6:8) / (5:8:40)、10+16+120(1:1.6:12)(5:8:60)、10+20+40(1:2:4)、10+20+80(1:2:8)、10+20+120(1:2:12)、20+12+120(1:0.6:6) / (5:3:30)、20+16 The combined effect of Leptochloa crus-galli on the seeds of the herb was synergistic when the dosage was 20+16+40(1:0.8:2)(5:4:10), 20+16+80(1:0.8:4) / (5:4:20), 20+16+120(1:0.8:6) / (5:4:30), 20+20+40(1:1:2), 20+20+80(1:1:4), and 20+20+120(1:1:6).

[0098] Table 3: Indoor activity test of penoxsulam, benzylsulfuron-methyl and cypermethrin mixed on snakehead intestine

[0099]

[0100]

[0101] It can be seen from the test results in Table 3 that the indoor activity test of penoxsulam, benzylsulfuron-methyl and safiophos on snakehead intestines is 5+12+40 (1:2.4:8), 5+12+80 (1:2.4:16), 5+12+120 (1:2.4:24), 5+16+40 (1:3.2:8), 5+16+120 (1:3.2:24), 5+20+40 (1:4:8), 5+20+80 (1:4:16), 5+20+120(1:4:24), 10+12+40(1:1.2:4) / (5:6:20), 10+12+80(1:1.2:8) / (5:6:40), 10+12+120(1:1.2:12) / (5:6:60), 10+16+40(1:1.6:4) / (5:8:20), 10+16+80(1:1.6:8) / (5 :8:40), 10+16+120(1:1.6:12)(5:8:60), 10+20+40(1:2:4), 10+20+80(1:2:8), 10+20+120(1:2:12), 20+12+40(1:0.6:2) / (5:3:10), 20+12+80(1:0.6:4) / (5:3:20), 20+12+120(1:0.6:6 ) / (5:3:30), 20+16+40(1:0.8:2)(5:4:10), 20+16+80(1:0.8:4) / (5:4:20), 20+16+120(1:0.8:6) / (5:4:30), 20+20+40(1:1:2), 20+20+80(1:1:4), 20+20+120(1:1:6).

[0102] Table 4: Indoor activity test of penoxsulam, benzylsulfuron-methyl and cypermethrin mixed with wild arrowhead

[0103]

[0104]

[0105] It can be seen from the test results in Table 4 that the indoor activity test of penoxsulam, benzylsulfuron-methyl and safflower-phosphorus mixed with wild arrowhead is 5+12+40 (1:2.4:8), 5+12+80 (1:2.4:16), 5+12+120 (1:2.4:24), 5+16+40 (1:3.2:8), 5+16+80 (1:3.2:16), 5+16+120 (1:3.2:24), 5 +20+40(1:4:8), 5+20+80(1:4:16), 5+20+120(1:4:24), 10+12+40(1:1.2:4) / (5:6:20), 10+12+80(1:1.2:8) / (5:6:40), 10+12+120(1:1.2:12) / (5:6:60), 10+16+40(1:1.6:4) / (5:8: 20), 10+16+80(1:1.6:8) / (5:8:40), 10+16+120(1:1.6:12)(5:8:60), 10+20+40(1:2:4), 10+20+80(1:2:8), 10+20+120(1:2:12), 20+12+80(1:0.6:4) / (5:3:20), 20+12+120(1:0.6:6 ) / (5:3:30), 20+16+40(1:0.8:2)(5:4:10), 20+16+80(1:0.8:4) / (5:4:20), 20+16+120(1:0.8:6) / (5:4:30), 20+20+40(1:1:2), 20+20+80(1:1:4), 20+20+120(1:1:6) showed synergistic effect on Sagittaria sagittifolia.

[0106] Table 5: Indoor activity test of penoxsulam, benzylsulfuron-methyl and cypermethrin mixed with Cyperus dimorphus

[0107]

[0108] It can be seen from the test results in Table 5 that the indoor activity test of penoxsulam, benzylsulfuron-methyl and sedgephos against opposite sex sedge is 5+12+40 (1:2.4:8), 5+12+80 (1:2.4:16), 5+12+120 (1:2.4:24), 5+16+40 (1:3.2:8), 5+16+80 (1:3.2:16), 5+16+120 (1:3.2:24), 5+20+40 ( 1:4:8), 5+20+80(1:4:16), 5+20+120(1:4:24), 10+12+40(1:1.2:4) / (5:6:20), 10+12+80(1:1.2:8) / (5:6:40), 10+12+120(1:1.2:12) / (5:6:60), 10+16+40(1:1.6:4) / (5:8:20), 10+16+80(1:1 .6:8) / (5:8:40), 10+16+120(1:1.6:12)(5:8:60), 10+20+40(1:2:4), 10+20+80(1:2:8), 10+20+120(1:2:12), 20+12+40(1:0.6:2) / (5:3:10), 20+12+80(1:0.6:4) / (5:3:20), 20+12+120(1:0. The combined effect on the opposite sex sedge was synergistic when the dosage was 20+16+40(1:0.8:2)(5:4:10), 20+16+80(1:0.8:4) / (5:4:20), 20+16+120(1:0.8:6) / (5:4:30), 20+20+40(1:1:2), 20+20+80(1:1:4) and 20+20+120(1:1:6).

[0109] When the combined effect of the above indoor test formula proportions shows synergistic effect, it is synergistic if they are enlarged or reduced in equal proportions.

[0110] Field efficacy test

[0111] Example 2: Field efficacy test of penoxsulam, benzylsulfuron-methyl and cypermethrin mixed with common weeds in rice fields

[0112] Test basis: The test refers to GB / T 17980.40-2000 "Guidelines for field efficacy tests of pesticides (I) Herbicides for controlling weeds in rice fields".

[0113] Test targets: Common grass weeds, broadleaf weeds and sedge weeds in rice fields.

[0114] 1. Field efficacy test in rice transplanting fields:

[0115] Test location: Rice transplanting field in Jurong City, Jiangsu Province. The test field is loam with an organic matter content of 18%, convenient irrigation and drainage, and medium to high fertility. The rice seedlings were transplanted to the field by machine on June 10, 2022. The growth of rice seedlings in each plot is consistent.

[0116] The test drugs, control drugs and dosages are shown in the table below.

[0117] Time and method of application: The test was carried out after the rice seedlings turned green after transplanting. Two days before application, a shallow water layer was maintained to allow weeds to emerge from the water surface. The pesticide was mixed with 20 kg / mu of fine soil and evenly applied. On the day of application, the weather was fine. After application, a stable water layer of 3-5 cm was maintained in the field. Water conservation was carried out for 5-7 days before normal production management was carried out.

[0118] Safety investigation: According to the test requirements, observe whether the pesticide has any damage to rice after the pesticide is applied, and record the type and degree of the damage in the following way:

[0119] Level 1: The rice grows normally without any damage symptoms;

[0120] Level 2: The rice is slightly damaged by pesticides, with the damage to the rice less than 10%;

[0121] Level 3: The rice is moderately damaged by pesticides, but can recover later and the yield is not affected;

[0122] Level 4: The rice is severely damaged by pesticides and is difficult to recover, resulting in reduced yield;

[0123] Level 5: The rice is severely damaged by pesticides and cannot recover, resulting in a significant reduction in yield or even a total loss of yield.

[0124] Efficacy investigation: The weed control efficacy of each plot was investigated 15 days and 45 days after the application of the drug, and the weed fresh weight control efficacy of each plot was investigated 45 days after the application of the drug. Four plots were randomly selected from each plot, and 0.25 m 2 Conduct a sample survey.

[0125] The protective effect formula is as follows:

[0126]

[0127] The results of the field efficacy test are shown in the following table:

[0128] Table 6: Control effect of different treatment groups on weeds in transplanted rice fields 15 days after each treatment

[0129]

[0130] Table 7: Control effect and fresh weight of weeds in transplanted rice fields by different treatment groups 45 days after each treatment

[0131]

[0132] As shown in the test results in Tables 6 and 7, 15 days after the application, the treatments of penoxsulam, benzylsulfuron-methyl and sedgefos showed good control effects on barnyard grass, rice grass, chapped chaff and sedge, and the control effects were all above 91%. 45 days after the application, the control effects of penoxsulam, benzylsulfuron-methyl and sedgefos on weeds in rice transplant fields were relatively good, with a total weed control effect of more than 94% and a total fresh weight control effect of more than 95%.

[0133] Table 8: Results of the rice safety survey in different treatment groups

[0134]

[0135]

[0136] The results showed that the test agents of each preparation example can effectively control weeds in the rice transplanting field. During the whole test process, no obvious symptoms of pesticide damage appeared in the rice treated by each test.

[0137] 2. Field efficacy test in direct-seeded rice fields

[0138] Test location: direct-seeding rice field in Hedong District, Linyi City, Shandong Province. The test site is relatively flat, with an organic matter content of 1.20%, convenient irrigation and drainage, and uniform fertility.

[0139] Rice variety: Lindao 16, rice is growing well.

[0140] The test drugs, control drugs and dosages are shown in the table below.

[0141] Application time and method: The test was conducted when the weeds were 2 to 4 leaves old. The paddy field was drained 1 day before application so that more than 2 / 3 of the weed stems and leaves were exposed to the water surface. The water was returned 1 day after application and a 3 to 5 cm water layer was maintained for 5 to 7 days. A Gongnong-16 backpack sprayer was used for conventional spraying, with a liquid volume of 35 L per mu.

[0142] Safety investigation: According to the test requirements, observe whether the pesticide has any damage to rice after the pesticide is applied, and record the type and degree of the damage in the following way:

[0143] Level 1: The rice grows normally without any damage symptoms;

[0144] Level 2: The rice is slightly damaged by pesticides, with the damage to the rice less than 10%;

[0145] Level 3: The rice is moderately damaged by pesticides, but can recover later and the yield is not affected;

[0146] Level 4: The rice is severely damaged by pesticides and is difficult to recover, resulting in reduced yield;

[0147] Level 5: The rice is severely damaged by pesticides and cannot recover, resulting in a significant reduction in yield or even a total loss of yield.

[0148] Efficacy investigation: The weed control efficacy of each plot was investigated 15 days and 35 days after the application of the drug, and the weed fresh weight control efficacy of each plot was investigated 35 days after the application of the drug. Four plots were randomly selected from each plot, and 0.25 m 2 Conduct a sample survey.

[0149] The protective effect formula is as follows:

[0150]

[0151] The results of the field efficacy test are shown in the following table:

[0152] Table 9: Effects of different treatments on direct-seeded rice fields

[0153]

[0154]

[0155] The results showed that, as shown in Table 9, 15 days after application, 45.6% penoxsulam·bensulfuron-methyl·safiophos wettable powder (4:9.6:32), 11.4% penoxsulam·bensulfuron-methyl·safiophos dispersible oil suspension (1:2.4:8), 8% penoxsulam·bensulfuron-methyl·safiophos emulsifiable concentrate (1:1:6), 24% penoxsulam·bensulfuron-methyl·safiophos water content was 2.34%. The plant control efficiencies of the treatment groups with granular agent (3:3:18) and 12.2% penoxsulam·benzylsulfuron-methyl·safiophos emulsifiable concentrate (1:3.2:8) were 92.77%, 93.35%, 90.62%, 91.07% and 89.49%, respectively. 35 days after application, the overall plant control efficiencies of each agent treatment were all above 93%, showing good persistence and being able to effectively inhibit weeds in direct-seeded rice fields.

[0156] It can be seen from the above indoor and field tests that the herbicidal composition of the present invention has reasonable components, expands the control spectrum, and improves the control effect on weeds in rice fields while reducing the amount of single-dose medicine used. It is harmless to rice and other non-target organisms and is environmentally friendly.

[0157] Although the present invention has been described in detail above with general descriptions and specific implementation schemes, it is obvious to those skilled in the art that some modifications or improvements can be made on the basis of the present invention. Therefore, these 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, active ingredient B and active ingredient C, wherein the active ingredient A is penoxsulam, the active ingredient B is benzylsulfuron-methyl, and the active ingredient C is thiabendazim.

2. The herbicidal composition according to claim 1, characterized in that The mass ratio of the active ingredient A to the active ingredient B to the active ingredient C is (1-50): (1-50): (1-150); Preferably, the mass ratio of the active ingredient A to the active ingredient B to the active ingredient C is (1-20):(1-20):(1-120).

3. The herbicidal composition according to claim 1, characterized in that The mass ratio of the active ingredient A to the active ingredient B to the active ingredient C is (1-10): (1-20): (1-120); Preferably, the mass ratio of the active ingredient A to the active ingredient B is (1-5):(1-8):(1-60).

4. The herbicidal composition according to claim 1, characterized in that The sum of the weight of the active ingredients accounts for 0.01 to 80% of the total weight of the herbicidal composition; Preferably, the total weight of active ingredients in the herbicidal composition accounts for 0.1 to 70% of the total weight of the herbicidal composition.

5. The herbicidal composition according to claim 1, characterized in that The herbicidal composition contains pesticide preparation auxiliary ingredients in addition to the active ingredients to prepare a preparation form permitted in agriculture.

6. The herbicidal composition according to claim 5, characterized in that The dosage form of the preparation is selected from solid preparation and / or liquid preparation; The solid preparations include powders, granules, pellets, tablets, strips, wettable powders, oil-dispersible powders, emulsion powders, water-dispersible granules, emulsion granules, water-dispersible tablets, soluble powders, soluble tablets or soluble granules; The liquid preparations include soluble solutions, soluble gels, oils, film-spreading oils, emulsifiable concentrates, latexes, dispersible solutions, ointments, aqueous emulsions, oil emulsions, microemulsions, lipid suspensions, microcapsule suspensions, oil suspensions, dispersible oil suspensions, suspoemulsions, microcapsule suspension-suspensions, microcapsule suspension-water emulsions or microcapsule suspension-suspoemulsions; Preferably, the solid preparation is selected from granules, water-dispersible granules and / or wettable powders, and the liquid preparation is selected from emulsifiable concentrates, water emulsions and / or dispersible oil suspensions.

7. Use of the herbicidal composition according to any one of claims 1 to 7 for controlling unwanted plants.

8. The use according to claim 7, characterized in that: The unwanted plant growth site is a rice field.

9. The use according to claim 7, characterized in that: The unwanted plants are grass weeds, broadleaf weeds and / or sedge weeds; Preferably, the grass weeds are barnyard grass, Leptochloa chinensis and / or Artemisia oryzae, the broadleaf weeds are Channa chussima, Dalbergia vaginalis and / or Sagittaria sagittifolia, and the Cyperus weeds are Cyperus difformis and / or Cyperus angustifolia.

10. A method for using a herbicide, characterized in that: The herbicidal composition and / or its formulation is applied to the locus where the unwanted plants grow.

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