A herbicidal composition

Abstract

The present application provides a kind of herbicide composition, it includes component A and component B, the component A is one of compound 1, compound 2 and compound 3, the component B is selected from one of cloransulam-methyl, isoxaflutole, dicamba, foramsulfuron, nicosulfuron, sulfometuron-methyl, carfentrazone-ethyl, 2,4-d, fenoxaprop-p and 2,4-dichlorophenoxyacetic acid, compound 1 compound 2 compound 3.The component A and component B in the composition of the present application have good synergistic effect, and have good application prospect.

Description

Technical Field

[0001] This invention relates to the field of pesticides, specifically to a herbicidal composition, a herbicidal composition formulation, and its application in controlling weeds. Background Technology

[0002] Cyclosulfonyl is a triketone herbicide for corn fields developed by Bayer in 2007. Its activity is higher than that of nicosulfonyl (nicosulfuron, mesosulfuron). The trade name is Ladtis, CAS No: 335104-84-2, and its molecular structure is as follows: .

[0003] Isoxaflutole, chemical name: 5-cyclopropyl-1,2-oxazol-4-yl-(4-trifluoromethyl-2-methanesulfonylphenyl)-methyl ketone, CAS Registry Number: 141112-29-0, molecular formula: C15H12F3NO4S. Isoxaflutole is the second largest product among HPPD inhibitor herbicides. Discovered in 1992 by Rhône-Plunk (now Bayer), it was launched in 1996. In 2018, its global sales reached $258 million, with Bayer playing a crucial role in its global market development. Isoxaflutole is a selective, systemic herbicide with a long residual effect. It is absorbed through the roots and leaves and translocated throughout the plant via the phloem and xylem. It is mainly used in fields of crops such as corn, sugarcane, sugar beets, fruits and vegetables, cotton, and grains. It controls more than 50 kinds of annual weeds, including broadleaf weeds and grass weeds, such as velvetleaf, lambsquarters, kochia, black nightshade, amaranth, willow-leaved knotweed, beggar-ticks, purslane, chickweed, elm, cocklebur, ironweed, water spinach, sorrel knotweed, speedwell, and other broadleaf weeds, as well as grass weeds such as crabgrass, barnyard grass, goosegrass, goosegrass, large foxtail, and foxtail. Apply before seedlings, early post-emergence stage, or before planting. The effective ingredient dosage is 75-140 g / hm2.

[0004] Dicamba, also known as the herbicide, has the chemical formula C8H6Cl2O3. It has systemic activity and is highly effective against annual and perennial broadleaf weeds. It is used on gramineous crops such as wheat, corn, millet, and rice to control weeds such as cleavers, buckwheat vines, lambsquarters, chickweed, vetch, shepherd's purse, cocklebur, sedge, field bindweed, thistle, horsetail, and sedge. It is applied as a post-emergence spray. The herbicide is absorbed through the stems, leaves, and roots of the weeds and translocated through the phloem and xylem, inhibiting the normal activity of plant hormones and thus causing their death. Because dicamba has a narrow spectrum of herbicides, it is not very effective against some resistant weeds. It has relatively low safety for wheat and is often used in combination with 2,4-D butyl ester or 2,4-methyl chloramine salt.

[0005] Formamide sulfonamide is a novel sulfonylurea herbicide that can control many important grass and broadleaf weeds in the world's major corn-producing regions.

[0006] Nicosulfuron, also known as Yunoule or Nicosulfuron, has the molecular formula C15H18N6O6S and CAS Registry Number 111991-09-4. It is a selective herbicide belonging to the sulfonylurea class and is usually used as a post-emergence herbicide to protect corn crops from weeds.

[0007] Sulfadiazon has the chemical formula C14H17N5O7S2 and CAS:122931-48-0. It is a sulfonylurea herbicide, a branched-chain amino acid synthesis inhibitor, and a selective post-emergence herbicide used to control annual or perennial grasses and broadleaf weeds in cornfields.

[0008] Benzoflubenzuron, with the molecular formula C16H17N3O5S and CAS Registry Number 210631-68-8, is a novel pyrazolone post-emergence foliar systemic herbicide. It exhibits systemic activity and can be absorbed by the leaves, roots, and stems of plants. Benzoflubenzuron has a high safety profile for corn and is also safe for sweet corn, waxy corn, and popcorn. It has a broad weed control spectrum, effectively controlling annual grasses and broadleaf weeds in cornfields. It shows good control of grass weeds and also has some inhibitory effect on sedges.

[0009] 2,4-D isooctyl ester, also known as 2,4-dichlorophenoxyacetic acid isooctyl ester or 2-methyl-4-chlorophenoxyacetic acid isooctyl ester, has the molecular formula C16H22Cl2O3 and CAS registration number 25168-26-7. Applicable crops include soybeans, corn, and wheat. It has good control effects on annual or perennial broadleaf weeds such as thistle, sow thistle, dayflower, horsetail, lambsquarters, knotweed, sedge, black nightshade, velvetleaf, sedge, chickweed, amaranth, hop, cocklebur, and field bindweed.

[0010] Quizalofop-P-ethyl (CAS registration number 62850-32-2) is an excellent variety of phenoxycarboxylic acid herbicides developed in the 1980s. It can be used to control annual and perennial grass weeds on a variety of dicotyledonous crops, including rice, soybeans, sugar beets, flax, peanuts, rapeseed, potatoes, and vegetables.

[0011] 2,4-D (C9H9ClO3) is a selective herbicide belonging to the phenoxycarboxylic acid class. It has strong systemic properties and is primarily used for post-emergence foliar application. The herbicide penetrates the cuticle and cell membrane, eventually reaching various parts of the plant. It has different effects on nucleic acid and protein synthesis at different sites. At the plant apex, it inhibits nucleic acid metabolism and protein synthesis, causing the growing point to stop growing, preventing young leaves from unfolding, and ultimately hindering photosynthesis. In the lower parts of the plant, it increases nucleic acid and protein synthesis in the stem tissues, promoting abnormal cell division, root tip swelling, loss of nutrient absorption capacity, stem twisting and deformity, sieve tube blockage, phloem damage, and impaired organic matter transport, thus disrupting the plant's normal life and ultimately leading to plant death. For many years, 2,4-D has been widely used in wheat fields, corn fields, rice paddies, urban lawns, and hemp crops to control annual or perennial broadleaf weeds and some sedges.

[0012] Cyclosulfuron, isoxaflutole, dicamba, formamide sulfur, nicosulfuron, sulfadiazine, benzoxazole, 2,4-D isooctyl ester, pinoxaflutole, and MCPA are all commonly used herbicides and are important safeguards for my country's food security. However, due to the properties of the herbicides themselves or improper application methods, they can cause phytotoxicity to crops, affecting their growth. The most direct and effective way to solve the above-mentioned herbicide phytotoxicity is to add herbicide safeners, which can protect plants from the phytotoxicity of herbicides without affecting the activity of the herbicides.

[0013] Safeguards disclosed to date possess a variety of chemical structures. Existing technologies disclose compounds 1, 2, and 3 as potential herbicide safeguards.

[0014] , , .

[0015] Compound 1 Compound 2 Compound 3

[0016] Existing technological research indicates that when herbicides are used in combination with safeners, while protecting crops from herbicide damage, they often also reduce the activity of the herbicides. Summary of the Invention

[0017] To address the drawback of existing technologies where the combined use of a safener and herbicide reduces the activity of the herbicide, this invention provides a herbicide composition comprising component A and component B. Component A typically serves as a safener, while component B is a conventional herbicide in the art. This composition enhances the activity of the herbicide while protecting plants from herbicide damage, exhibiting excellent synergistic effects in weed control.

[0018] Specifically, this invention provides a herbicidal composition comprising component A and component B, wherein component A is one of compound 1, compound 2, and compound 3, and component B is selected from one of cyclosulfonamide, isoxaflutole, dicamba, formamide sulfonamide, nicosulfuron, sulfadiazine, benzoxazol, 2,4-D isooctyl ester, quizalofop-p-ethyl, and MCPA.

[0019] , , .

[0020] Compound 1 Compound 2 Compound 3

[0021] The present invention also provides a herbicide containing the above-described herbicide composition of the present invention and suitable adjuvants.

[0022] The present invention also provides a method for controlling weeds, the method comprising bringing vegetation or its environment into contact with a weed-controlling amount of the herbicidal composition of the present invention.

[0023] Beneficial effects of the invention

[0024] 1. Component A in the composition of the present invention can reduce the toxicity of component B;

[0025] 2. In the composition of the present invention, components A and B are combined in a certain proportion range, exhibiting a strong synergistic effect. Detailed Implementation

[0026] The specific embodiments of the present invention will be further described in detail below with reference to the examples. To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Unless otherwise expressly stated, throughout the specification and claims, the term "comprising" or its variations such as "including" or "comprising of," etc., will be understood to include the stated components or steps, without excluding other substances or steps.

[0027] Furthermore, to better illustrate the present invention, numerous specific details are provided in the following detailed embodiments. Those skilled in the art should understand that the present invention can be practiced without certain specific details. In some embodiments, materials, methods, and means well-known to those skilled in the art are not described in detail in order to highlight the spirit of the invention.

[0028] This invention first provides a herbicidal composition comprising component A and component B, wherein component A is one of compound 1, compound 2, and compound 3, and component B is selected from one of cyclosulfonamide, isoxaflutole, dicamba, formamide sulfonamide, nicosulfuron, sulfadiazine, benzoxazol, 2,4-D isooctyl ester, quizalofop-p-ethyl, and MCPA.

[0029] , , .

[0030] Compound 1 Compound 2 Compound 3

[0031] Preferably, the weight ratio of component A to component B is 1:100-100:1, more preferably 1:50-20:1.

[0032] In some technical solutions, component B is selected from cyclosulfonone, and component A is selected from compound 1 or compound 2. The weight ratio of component A to component B is 1:10 to 1:1, preferably 1:8, 1:4, or 1:2. Within the above range, a strong synergistic effect is observed.

[0033] In some technical solutions, component B is selected from isoxaflutole, and component A is selected from compound 1 or compound 2. The weight ratio of component A to component B is 1:10 to 1:1, more preferably 1:4, 1:2, or 1:1. Within the above range, a strong synergistic effect is observed.

[0034] In some technical solutions, component B is selected from dicamba, and component A is selected from compound 1 or compound 2. The weight ratio of component A to component B is 1:50 to 1:1, more preferably 1:50, 1:30, or 1:20. Within the above range, a strong synergistic effect is observed.

[0035] In some technical solutions, component B is selected from formamide sulfonamide, component A is selected from compound 1 or compound 3, and the weight ratio of component A to component B is 1:20-1:1, more preferably 1:11, 1:5, or 1:1; within the above range, a strong synergistic effect is shown.

[0036] In some technical solutions, component A is selected from compound 1 or compound 2, and component B is selected from quizalofop-p-ethyl. The weight ratio of component A to component B is 1:15-1:1, preferably 1:10, 1:5, or 1:2. Within the above range, compound 1 or compound 2 has a good synergistic effect with quizalofop-p-ethyl.

[0037] In a preferred embodiment, component A is selected from compound 1, and component B is selected from nicosulfuron. The weight ratio of component A to component B is 1:20 to 1:1, more preferably 1:12, 1:6, or 1:4. Within the above range, compound 1 and nicosulfuron exhibit good synergistic effects.

[0038] In a preferred embodiment, component A is selected from compound 1, component B is selected from sulfadiazine, and the weight ratio of compound 1 to sulfadiazine is 1:10-1:1, preferably 1:7, 1:4, or 1:2; within the above range, compound 1 and sulfadiazine exhibit excellent synergistic effects.

[0039] In a preferred embodiment, component A is selected from compound 1, component B is selected from benzoxazine, and the weight ratio of compound 1 to benzoxazine is 1:15-1:1, preferably 1:10, 1:5, or 1:2; within the above range, compound 1 and benzoxazine exhibit excellent synergistic effects.

[0040] In a preferred embodiment, component A is selected from compound 1, component B is selected from 2,4-D isooctyl ester, and the weight ratio of compound 1 to 2,4-D isooctyl ester is 1:30-1:1, preferably 1:26, 1:13, or 1:10; within the above range, compound 1 and 2,4-D isooctyl ester exhibit excellent synergistic effects.

[0041] In a preferred embodiment, component A is selected from compound 1, component B is selected from 2,4-methylchloro, and the weight ratio of compound 1 to 2,4-methylchloro is 1:50-1:1, preferably 1:40, 1:20, or 1:10. Within the above range, compound 1 and 2,4-methylchloro exhibit excellent synergistic effects.

[0042] This invention provides a herbicide containing the herbicidal composition described above and suitable adjuvants. Preferably, the herbicide of this invention can be formulated into conventional formulations for use in the art, including water-in-oil emulsions, emulsifiable concentrates, suspension concentrates, aqueous solutions, water-dispersible granules, powders, wettable powders, soluble powders / granules, granules, or microcapsule suspensions, etc.

[0043] The herbicides of this invention include one or more of the following adjuvants: emulsifier, dispersant, wetting agent, penetrant, antifreeze agent, stabilizer, defoamer, preservative, thickener, disintegrant, binder, filler / carrier, solvent, and cosolvent.

[0044] The emulsifiers are selected from fatty alcohol polyoxyethylene ethers, nonylphenol polyoxyethylene ethers, fatty amine polyoxyethylene ethers, alkyl glycosides, and the Span series: Span-20, Span-40, Span-60, Span-65, Span-80, Span-85, etc.; and the agricultural emulsion series: Agricultural Emulsion 601#, Agricultural Emulsion 602#, Agricultural Emulsion 603#, Agricultural Emulsion 604#, Agricultural Emulsion 401#, Agricultural Emulsion 402#, Agricultural Emulsion 700#, Agricultural Emulsion 33#, Agricultural Emulsion 34#, Agricultural Emulsion 1601#, Agricultural Emulsion 1602#, etc. Tween series: Tween-20, Tween-40, Tween-60, Tween-65, Tween-80, Tween-85, etc., containing one or more of the following: castor oil polyoxyethylene ether, polyoxyethylene oleate, ethylene oxide / propylene oxide co-ether, polyglycerol fatty acid ester, calcium dodecylbenzene sulfonate, polyoxyethylene ether sulfate salt, polyoxyethylene ether phosphate salt, etc.

[0045] The preferred dispersants are sodium succinate diester sulfonate, polycarboxylate, naphthalene or alkylnaphthalene formaldehyde condensate sulfonate, phosphate salt, polyoxyethylene polyether block copolymer, lignin sulfonate, fatty alcohol polyoxypropylene polyoxyethylene ether, polyoxyethylene ether sulfate, etc.

[0046] Preferred wetting agents / penetrating agents include castor oil polyoxyethylene ethers (BY-110, BY-125, BY-140, etc.), alkylphenol polyoxyethylene ethers (NP, TX, OP series, etc.), fatty alcohol ethers (MOA series, isomeric alcohol ether 1300 series, penetrant JFC, emulsifier AEO, etc.), fatty amine polyoxyethylene ethers (AC-1800 series, AN-1800 series, AC-1200 series, etc.), and polyarylphenol polyoxyethylene ethers (including agricultural...). Milk 600#, Agricultural Milk 400#, Agricultural Milk 33#, Agricultural Milk 34#, etc.; Alkyl glycosides: including C12-C14 alkyl glycosides, C8-C10 alkyl glycosides, C8-C14 alkyl glycosides, etc.; Sodium alkyl succinate sulfonate: including Fast T, etc.; Polycyclic aromatic hydrocarbon formaldehyde condensate sulfonate or alkyl aromatic hydrocarbon sulfonate: including dispersant NNO, pull-opening powder BX, etc.; Sodium salt of fatty alcohol ether sulfate AES, calcium dodecylbenzene sulfonate, sodium α-alkenyl sulfonate, etc., one or more of these.

[0047] The preferred antifreeze is one or more of the following: sodium nitrite, calcium nitrite, carbonate, calcium chloride, magnesium chloride, sodium acetate, methanol, ethanol, isopropanol, ethylene glycol, propylene glycol, glycerol, diethylene glycol, ethylene glycol butyl ether, propylene glycol butyl ether, polyethylene glycol, and urea.

[0048] The stabilizer is preferably one or more of the following: epoxidized soybean oil, epichlorohydrin, phosphite, epoxidized linseed oil, BHA, BHT, etc.

[0049] The preferred defoamer is one or more of the following: siloxane oil, propanol, butanol, tributyl phosphate, polyether surfactants, polyethylene glycol fatty acid esters, and mineral oil.

[0050] Preservatives are preferably one or more of the following: benzoic acid, potassium benzoate, sodium benzoate, sorbic acid, potassium sorbate, sodium sorbate, propionic acid, calcium propionate, sodium propionate, p-hydroxybenzoic acid, hydroquinone, isothiazolinone, etc.

[0051] The thickener is preferably one or more of the following: sodium chloride, ammonium sulfate, ammonium chloride, magnesium aluminum silicate, xanthan gum, starch, agar, hydroxymethyl cellulose, hydroxypropyl methyl cellulose, diatomaceous earth, organobentonite, and polyvinyl alcohol.

[0052] The preferred disintegrants are one or more of sodium carboxymethyl starch, croscarmellose sodium, croscarmellose cellulose, modified starch, croscarmellose polyvinylpyrrolidone, magnesium aluminum silicate, sodium alginate, etc.

[0053] The binder is selected from one or more of starch, gelatin and gum arabic, povidone, sucrose, glucose, and dextrin.

[0054] The carrier / filler is preferably one or more of the following: diatomaceous earth, attapulgite, bentonite, zeolite, sepiolite, kaolin, clay, silica, light calcium carbonate, starch, magnesium stearate, talc.

[0055] The solvent and co-solvent are selected from vegetable oils or methylated vegetable oils, including sunflower oil, cottonseed oil, palm oil, peanut oil, castor oil, soybean oil, rapeseed oil, corn oil, etc., and one or more of the following: water, naphtha, liquid paraffin oil, benzene, toluene, xylene, naphthalene, acetonitrile, acetone, DMF, dimethyl sulfoxide, methanol, ethanol, ethylene glycol, isopropanol, n-butanol, isobutanol, isoamyl alcohol, 2-octanol, nonanol, cyclohexanol, dichloromethane, chloroform, cyclohexanone, N-methylpyrrolidone, acetate, etc. Specific Implementation

[0056] I. Preparation Examples

[0057] 1.1 Synthesis of Compound 1

[0058]

[0059] Take 8.6 g of p-aminosulfonylbenzoic acid, dissolve it in ethanol, add 0.43 g of concentrated sulfuric acid, and reflux for 2 h; after cooling, add 13.6 g of MgO / KL (5% loading, weight percentage) and 7.7 g of dimethylamine methanol solution (30%), and react at 40 °C for 2 h; after cooling, add 7.9 g of ethyl 2-chlorobenzoate, and react at 50 °C for 2 h. After the reaction is complete, filter, remove the solvent from the filtrate, and recrystallize to obtain 14.3 g of the target product.

[0060] 1.2 Synthesis of Compound 2

[0061]

[0062] Take 8.6 g of p-aminosulfonylbenzoic acid, dissolve it in ethanol, add 0.43 g of concentrated sulfuric acid, and reflux for 2 h; after cooling, add 13.6 g of MgO / KL (5% loading, weight percentage) and 3.0 g of isopropylamine, and react at 40 °C for 2 h; after cooling, add 7.9 g of ethyl 2-chlorobenzoate, and react at 50 °C for 2 h. After the reaction is complete, filter, remove the solvent from the filtrate, and recrystallize to obtain 14.8 g of the target product.

[0063] 1.3 Synthesis of Compound 3

[0064]

[0065] Take 8.6 g of p-aminosulfonylbenzoic acid, dissolve it in ethanol, add 0.43 g of concentrated sulfuric acid, and reflux for 2 h; after cooling, add 13.6 g of MgO / KL (5% loading, weight percentage) and 2.9 g of cyclopropylamine, and react at 40 °C for 2 h; after cooling, add 7.9 g of ethyl 2-chlorobenzoate, and react at 50 °C for 2 h. After the reaction is complete, filter, remove the solvent from the filtrate, and recrystallize to obtain 14.8 g of the target product.

[0066] II. Bioactivity Test

[0067] 2.1 Safety Experiment

[0068] Test reagents: Weigh a certain amount of component A and component B, dissolve them in acetone, and dilute them with 0.1% Tween 80 aqueous solution. The specific dosage and ratio are shown in Table 1-3. Component B herbicide was purchased from the market, and component A was synthesized in our laboratory.

[0069] Test crops: Take sieved and air-dried soil with 3% organic matter content, good permeability, and pH 7. Fill the pots with soil to 4 / 5 full and water from the top to fully moisten the soil. Take 35 seeds of the test crop and sow them evenly on the soil surface. Cover with about 1.0 cm of soil and move to a greenhouse for cultivation at 20±2℃. Water corn and wheat by drip irrigation from the bottom of the pots, and water rice by irrigation from the top of the pots until saturated. After the crops emerge, thin them out and transplant them, leaving 15 plants of basically the same growth in each pot and evenly distributed in the pots.

[0070] Application method: Spray the pesticide at the 3-4 leaf stage of the crop, with a spray volume of 350 L / ha. Each treatment has 4 replicates, and a control without pesticide is set up. After 14 days, observe the phytotoxicity and record the fresh weight of the aboveground parts of each treatment.

[0071] Phytotoxicity effect representation: The fresh weight inhibition rate is calculated according to standard NY / T 1155.8-2007, using the formula R= , where R represents the fresh weight inhibition rate, X0 represents the control fresh weight, and X1 represents the treatment fresh weight.

[0072] Table 1. Safety test results of herbicide compositions on corn

[0073]

[0074]

[0075] Table 2. Safety test results of herbicidal compositions on wheat

[0076]

[0077] Table 3. Safety test results of herbicidal compositions on rice

[0078]

[0079] As shown in Table 1-3, when component A consists of compounds 1, 2, and 3, it has a good detoxification effect on the herbicide of component B.

[0080] 2.2 Weed Control Experiment

[0081] Test reagents: Weigh a certain amount of component A and component B, dissolve them in acetone, and dilute them with a 0.1% Tween 80 aqueous solution. The specific dosage and ratio are shown in Table 4-13 below. Component A was synthesized in our laboratory, and component B herbicide was purchased from the market.

[0082] Test weeds: Take sieved and air-dried soil with an organic matter content of 2.5%, a pH of about 7, and good permeability. Fill the pots with soil to 4 / 5 full and water from the top to make the soil completely moist. Take 35 test weed seeds and sow them evenly on the soil surface, cover with about 1.0 cm of soil, and move to a greenhouse for cultivation at 20±2℃. Water as needed. For dryland weeds, water is added by drip irrigation from the bottom of the pot, and for paddy field weeds, water is added by irrigation from the top of the pot until saturated. After the weeds emerge, thin them out and transplant them, leaving 15 weeds with basically the same growth in each pot.

[0083] Application method: Spray the pesticide at the 3-4 leaf stage of weeds, with a spray volume of 350 L / ha. Each treatment has 4 replicates, and a control without pesticide is set up. After 14 days, observe the symptoms of weed damage and growth inhibition, and weigh the fresh weight of the above-ground part of the weeds to calculate the fresh weight inhibition rate (%).

[0084] Fresh weight inhibition rate (%) = (control fresh weight - treatment fresh weight) / control fresh weight × 100.

[0085] Evaluation method for synergistic effects: The Gowing method is used to evaluate the synergistic effects of herbicides. The formula is as follows: Where X is the fresh weight inhibition rate when the dosage of compound I is P; Y is the fresh weight inhibition rate when the dosage of herbicide B is Q; E0 is the theoretical control efficacy when the dosage of compound I is P + the dosage of herbicide B is Q; and E is the actual control efficacy after compound I and herbicide B are mixed as described above.

[0086] When E-E0 > 10%, it indicates a synergistic effect; when E-E0 is between ±10%, it indicates an additive effect; and when E-E0 < -10%, it indicates an antagonistic effect.

[0087] Table 4. Control effects of the combination of component A and cyclosulfonone on foxtail grass.

[0088]

[0089] Table 5. Control efficacy of the combination of component A and isoxaflutole against weeds.

[0090]

[0091] Table 6. Control efficacy of the combination of component A and dicamba against weeds.

[0092]

[0093] Table 7. Control efficacy of the combination of component A and formamide-sulfuron against weeds.

[0094]

[0095] Table 8. Control efficacy of the combination of component A and nicosulfuron against weeds.

[0096]

[0097] Table 9. Control efficacy of the combination of component A and sulfadiazine against weeds.

[0098]

[0099] Table 10. Control efficacy of the combination of component A and benzoyl permethrin against weeds.

[0100]

[0101] Table 11. Control efficacy of the combination of component A and 2,4-D isooctyl ester against weeds.

[0102]

[0103] Table 12. Control efficacy of the combination of component A and quizalofop-p-ethyl against weeds.

[0104]

[0105] Table 13. The control effect of the combination of component A and 2,4-D on weeds.

[0106]

[0107] As shown in Table 4-13, compounds 1, 2 and 3 have a good synergistic effect with specific herbicides within a specific ratio range.

Claims

1. A herbicidal composition, characterized by comprising: comprising a component A and a component B, wherein the component A is one of compound 1, compound 2 and compound 3, and the component B is selected from the group consisting of the weight ratio of the component A and the component B is 1:10-1:

1.

2. The herbicidal composition according to claim 1, characterized by the weight ratio of the component A and the component B is 1:8, 1:4, 1:

2.

3. A herbicide, characterized by comprising: a herbicidal composition according to any one of claims 1 or 2 and a suitable adjuvant.

4. The herbicide according to claim 3, characterized in that, the herbicide can be formulated into a suitable dosage form.

5. The herbicide according to claim 4, characterized in that, the dosage form is an emulsion in water, an emulsifiable concentrate, a suspension, a water solution, a water dispersible granule, a powder, a wettable powder, a soluble powder / granule, a granule or a microcapsule suspension.

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