Weeding composition

Abstract

The invention provides a weeding composition which comprises a component A and a component B. The component A is one of a compound 1, a compound 2 and a compound 3, the component B is one of tembotrione, isoxaflutole, dicamba, foramsulfuron, nicosulfuron, rimsulfuron, topramezone, 2, 4-D isooctyl, fenoxaprop-p-ethyl and MCPA, and the component B is one of # imgabs 0 #, # imgabs 1 #, # imgabs 2 #, a compound 1, a compound 2 and a compound 3. The component A and the component B in the composition have a good synergistic effect, and the composition has a good application prospect.

Description

Technical Field

[0001] The present invention relates to the field of pesticides, and in particular to a herbicidal composition, a herbicidal composition preparation and application thereof in preventing and controlling weeds. Background Art

[0002] Tambara is a triketone cornfield herbicide developed by Bayer in 2007. Its activity is higher than mesotrione (mesotrione, mesotrione). The trade name is Laudis, CAS No: 335104-84-2, and the molecular structure is as follows: .

[0003] Isoxaflutole, chemical name: 5-cyclopropyl-1,2-oxazol-4-yl-(4-trifluoromethyl-2-methylsulfonylphenyl)-methanone, CAS registration number: 141112-29-0, molecular formula: C15H12F3NO4S. Isoxaflutole is the second largest product among HPPD inhibitor herbicides. It was discovered by Rhone-Poulenc (now Bayer) in 1992 and launched in 1996. Its global sales in 2018 were US$258 million. Bayer played a pivotal role in the development of its global market. Isoxaflutole is a selective, systemic herbicide with a long lasting effect. After being absorbed by the roots and leaves of plants, it is transmitted to the entire plant through the phloem and xylem. It is mainly used in corn, sugarcane, beet, fruit and vegetable, cotton, cereal and other crop fields to control more than 50 annual weeds including broadleaf weeds and grass weeds, such as velvetleaf, quinoa, kochia, nightshade, amaranth, willow leaf polygonum, bidens, purslane, chickweed, elsholtzia, cocklebur, amaranth, water spinach, sorrel, veronica and other broadleaf weeds, as well as grass weeds such as crabgrass, barnyard grass, goosegrass, chinensis, foxtail, giant foxtail and foxtail. Apply the pesticide before seedlings, early post-seedlings or before planting, and the dosage of active ingredients is 75-140 g / hm2.

[0004] Dicamba, also known as Baicaodi, has a chemical formula of C8H6Cl2O3. It has a systemic conduction effect and has a significant control effect on annual and perennial broad-leaved weeds. It is used to control cleavers, buckwheat vines, quinoa, chickweed, vetch, sow thistle, Xanthium sibiricum, thin-sprung grass, field bindweed, prickly lettuce, horsetail, carp intestines, etc. in gramineous crops such as wheat, corn, millet, and rice. Spray after the seedlings emerge, the agent is absorbed by the stems, leaves, and roots of the weeds, and is conducted up and down through the phloem and xylem, hindering the normal activity of plant hormones and killing them. Due to the narrow spectrum of dicamba, it is not effective against some resistant weeds. It is less safe for wheat and is often mixed with 2,4-D butyl or 2-methyl-4-chloramine salt.

[0005] Formamidosulfuron Formamidosulfuron is a new sulfonylurea herbicide that can control many important grass weeds and broadleaf weeds in the world's major corn producing areas.

[0006] Nicosulfuron, also known as Yunongle and Nicosulfuron, has a molecular formula of C15H18N6O6S and a CAS registration number of 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] The chemical formula of sulfasulfuron-methyl is C14H17N5O7S2, 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 grass and broad-leaved weeds in corn fields.

[0008] The molecular formula of fenpyrazone is C16H17N3O5S, and the CAS registration number is 210631-68-8. It is a new type of pyrazolone post-emergence stem and leaf treatment systemic herbicide. It has a systemic conduction effect and can be absorbed by the leaves, roots and stems of plants. Fenpyrazone is relatively safe for corn, and is also safe for sweet corn, glutinous corn, popcorn, etc. Fenpyrazone has a wide spectrum of weed control and can effectively control annual grass and broad-leaved weeds in corn fields. It has a good control effect on grass weeds and also has a certain inhibitory effect on sedge weeds.

[0009] 2,4-D 2-ethylhexyl ester is also known as 2,4-dichlorophenoxyacetic acid 2-ethylhexyl ester, 2-methyl-4-chlorophenoxyacetic acid 2-ethylhexyl ester, molecular formula C16H22Cl2O3, CAS registration number: 25168-26-7. Applicable crops: soybean, corn, wheat. It has a good control effect on annual or perennial broad-leaved weeds such as thistle, sonchus, coleus, horsetail, quinoa, polygonum, rice pot, nightshade, ramie, ion grass, chickweed, amaranth, humulus, Xanthium, field bindweed, etc.

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

[0011] The molecular formula of 2-methyl-4-chloropropene is C9H9ClO3, and the CAS registration number is 94-74-6. 2-methyl-4-chloropropene is a phenoxycarboxylic acid selective herbicide with strong systemic conductivity. It is mainly used for stem and leaf treatment after seedlings. The agent passes through the cuticle and cytoplasmic membrane, and finally conducts to various parts, producing different effects on nucleic acid and protein synthesis in different parts. It inhibits nucleic acid metabolism and protein synthesis at the top of the plant, stops the growth point from growing, and the young leaves cannot stretch until photosynthesis cannot proceed normally; the agent conducted to the lower part of the plant increases the synthesis of nucleic acid and protein in the plant stem tissue, promotes abnormal cell division, root tip swelling, loss of nutrient absorption ability, stem distortion, deformity, sieve tube blockage, phloem damage, organic matter transportation obstruction, thereby destroying the normal life ability of the plant and eventually leading to plant death. For many years, 2-methyl-4-chloropropene has been widely used in wheat fields, corn fields, rice fields, urban lawns, and hemp crops to control annual or perennial broadleaf weeds and some sedges.

[0012] Cyclosulfuron, isoxazolidinone, dicamba, foramsulfuron, nicosulfuron, sulfamethoxam, benzasulfuron, 2,4-D isooctyl, fenoxaprop-butyl and 2-Methyl-4-chloro-1-butyl are all commonly used herbicides and are an important guarantee for ensuring my country's food security. However, due to the nature of the herbicides themselves or improper application methods, they can cause phytotoxicity to crops and affect the growth of crops. The most direct and effective way to solve the phytotoxicity of the above-mentioned herbicides is to add herbicide safeners, which can protect plants from the phytotoxicity of the herbicides without affecting the activity of the herbicides.

[0013] The safeners disclosed so far have various chemical structures. The prior art discloses that Compound 1, Compound 2 and Compound 3 are potential herbicide safeners.

[0014] , , .

[0015] Compound 1 Compound 2 Compound 3

[0016] Prior art studies have shown that when herbicides are used in combination with safeners, while protecting crops from damage by the herbicides, they also tend to reduce the activity of the herbicides. Summary of the invention

[0017] In view of the defect in the prior art that the activity of the herbicide is reduced when the safener is used in combination with the herbicide, the present invention provides a herbicide composition, which contains component A and component B, wherein component A can generally be used as a safener, and component B is a conventional herbicide in the art. The composition of the present invention can enhance the activity of the herbicide while protecting the plant from damage by the herbicide, and shows an excellent synergistic effect in controlling weeds.

[0018] Specifically, the present invention provides a herbicidal composition, which comprises component A and component B, wherein component A is one of compound 1, compound 2 and compound 3, and component B is one of tembotrione, isoxathiapiprolin, dicamba, foramsulfuron, nicosulfuron, sulfamethoxam, benomyl, 2,4-D isooctyl, fenoxaprop-butyl and 2-Methyl-4-chloro-1-butyl,

[0019] , , .

[0020] Compound 1 Compound 2 Compound 3

[0021] The present invention also provides a herbicide, which contains the above herbicidal composition of the present invention and a suitable adjuvant.

[0022] The present invention also provides a method for controlling weeds, which comprises contacting vegetation or its environment with a herbicidally effective amount of the herbicidal composition of the present invention.

[0023] Beneficial effects of the present invention

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

[0025] 2. The combination of component A and component B in the composition of the present invention within a certain ratio range shows a strong synergistic effect. DETAILED DESCRIPTION

[0026] The specific implementation methods of the present invention are further described in detail below in conjunction with the examples. In order to make the purpose, 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 part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise expressly stated, throughout the specification and claims, the term "including" or its variations such as "comprising" or "including" will be understood to include the stated components or steps, without excluding other material components or steps.

[0027] In addition, in order to better illustrate the present invention, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present invention can be implemented without certain specific details. In certain embodiments, raw materials, methods, means, etc. well known to those skilled in the art are not described in detail to highlight the gist of the present invention.

[0028] The present invention first provides a herbicidal composition, comprising component A and component B, wherein the component A is one of compound 1, compound 2 and compound 3, and the component B is one of tembotrione, isoxathiapiprolin, dicamba, foramsulfuron, nicosulfuron, sulfamethoxam, benomyl, 2,4-D isooctyl, fenoxaprop-butyl and 2-Methyl-4-chloro-1-butyl,

[0029] , , .

[0030] Compound 1 Compound 2 Compound 3

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

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

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

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

[0035] In some technical schemes, the component B is selected from foramsulfuron, the 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, 1:1; within the above range, a strong synergistic effect is shown.

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

[0037] In a preferred technical solution, the component A is selected from compound 1, the component B is selected from nicosulfuron, and the weight ratio of the component A to the component B is 1:20-1:1, more preferably 1:12, 1:6, 1:4. Within the above range, compound 1 and nicosulfuron have a good synergistic effect.

[0038] In the preferred technical solution, the component A is selected from compound 1, and the component B is selected from sulfasulfuron-methyl. The weight ratio of compound 1 to sulfasulfuron-methyl is 1:10-1:1, preferably 1:7, 1:4, 1:2; within the above range, compound 1 and sulfasulfuron-methyl show excellent synergistic effect.

[0039] In the preferred technical solution, the component A is selected from compound 1, the component B is selected from benzathine, the weight ratio of compound 1 to benzathine is 1:15-1:1, preferably 1:10, 1:5, 1:2; within the above range, compound 1 and benzathine show excellent synergistic effect.

[0040] In the preferred technical solution, the component A is selected from compound 1, the component B is selected from 2,4-diisooctyl ester, and the weight ratio of compound 1 to 2,4-diisooctyl ester is 1:30-1:1, preferably 1:26, 1:13, 1:10; within the above range, compound 1 and 2,4-diisooctyl ester exhibit excellent synergistic effect.

[0041] In the preferred technical scheme, the component A is selected from compound 1, the component B is selected from 2-methyl-4-chloro-1-yl chloride, the weight ratio of compound 1 to 2-methyl-4-chloro-1-yl chloride is 1:50-1:1, preferably 1:40, 1:20, 1:10; within the above range, compound 1 and 2-methyl-4-chloro-1-yl chloride exhibit excellent synergistic effect.

[0042] The present invention provides a herbicide, which contains the herbicidal composition described above and a suitable adjuvant. Preferably, the herbicide of the present invention can be prepared into conventional formulations in the art for use, including aqueous emulsions, emulsifiable concentrates, suspensions, aqueous solutions, water-dispersible granules, powders, wettable powders, soluble powders / granules, granules or microcapsule suspensions, etc.

[0043] The auxiliary agent described in the herbicide of the present invention is one or more of an emulsifier, dispersant, wetting agent, penetrant, antifreeze agent, stabilizer, defoamer, preservative, thickener, disintegrant, binder, filler / carrier, solvent, cosolvent, etc.

[0044] The emulsifier is selected from fatty alcohol polyoxyethylene ether, nonylphenol polyoxyethylene ether, fatty amine polyoxyethylene ether, alkyl glycoside, Span series: Span-20, Span-40, Span-60, Span-65, Span-80, Span-85, etc., Nongru series: Nongru 601#, Nongru 602#, Nongru 603#, Nongru 604#, Nongru 401#, Nongru 402#, Nongru 700#, Nongru 33#, Nongru 34#, Nongru 1601#, Nongru 1602#, etc., Tween series: Tween-20, Tween-40, Tween-60, Tween-65, Tween-80, Tween-85, etc., one or more of castor oil polyoxyethylene ether, polyoxyethylene oleate, ethylene oxide / propylene oxide copolyether, polyglycerol fatty acid ester, calcium dodecylbenzene sulfonate, polyoxyethylene ether sulfate, polyoxyethylene ether phosphate, etc.

[0045] The dispersant is preferably sodium succinate diester sulfonate, polycarboxylate, naphthalene or alkylnaphthalene formaldehyde condensate sulfonate, phosphate ester salt, polyoxyethylene polypropylene ether block copolymer, lignin sulfonate, fatty alcohol polyoxypropylene polyoxyethylene ether, polyoxyethylene ether sulfate ester salt, etc.

[0046] Wetting agents / penetrants are preferably castor oil polyoxyethylene ethers: including BY-110, BY-125, BY-140, etc., alkylphenol polyoxyethylene ethers: including NP, TX, OP series, etc., fatty alcohol ethers: including MOA series, isomeric alcohol ether 1300 series, penetrant JFC, emulsifier AEO, etc., fatty amine polyoxyethylene ethers: including AC-1800 series, AN-1800 series, AC-1200 series, etc., polyarylphenol polyoxyethylene ethers: including agricultural Milk 600#, Agricultural Milk 400#, Agricultural Milk 33#, Agricultural Milk 34#, etc., Alkyl glycosides: including C12-C14 alkyl glycoside, C8-C10 alkyl glycoside, C8-C14 alkyl glycoside, etc., Sodium alkyl succinate sulfonate: including fast T, etc., Polycyclic aromatic hydrocarbon formaldehyde condensation sulfonate or alkyl aromatic hydrocarbon sulfonate: including diffuser NNO, pull open powder BX, etc., fatty alcohol ether sulfate sodium salt AES, calcium dodecylbenzene sulfonate, α-olefin sulfonate, etc. One or more.

[0047] The antifreeze agent is preferably one or more of 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, urea, and the like.

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

[0049] The defoaming agent is preferably one or more of silicone oil, propanol, butanol, tributyl phosphate, polyether surfactant, polyethylene glycol fatty acid ester, mineral oil and the like.

[0050] The preservative is preferably one or more of benzoic acid, potassium benzoate, sodium benzoate, sorbic acid, potassium sorbate, sodium sorbate, propionic acid, calcium propionate, sodium propionate, p-hydroxybenzoic acid, hydroquinone, isothiazolinone and the like.

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

[0052] The disintegrant is preferably one or more of sodium carboxymethyl starch, cross-linked sodium carboxymethyl starch, cross-linked carboxymethyl cellulose, modified starch, cross-linked polyvinyl pyrrolidone, magnesium aluminum silicate, sodium alginate and the like.

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

[0054] The carrier / filler is preferably one or more of diatomaceous earth, attapulgite, bentonite, zeolite, sepiolite, kaolin, clay, white carbon black, light calcium carbonate, starch, magnesium stearate, talc and the like.

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

[0056] 1. Preparation Example

[0057] 1.1 Synthesis of compound 1

[0058]

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

[0060] 1.2 Synthesis of compound 2

[0061]

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

[0063] 1.3 Synthesis of compound 3

[0064]

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

[0066] 2. Biological Activity Test

[0067] 2.1 Safety Experiment

[0068] Test agents: 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 usage and ratio are shown in Table 1-3, among which component B herbicide is purchased from the market, and component A is synthesized by this laboratory.

[0069] Test crops: Take sieved air-dried soil with an organic matter content of 3%, good permeability and pH 7, and fill the soil quantitatively to 4 / 5 of the pot. Water from the top to make the soil completely moist. Take 35 test crop seeds and evenly sow them on the soil surface. Cover the soil with about 1.0 cm, move to the greenhouse, and cultivate at 20±2℃. Corn and wheat are watered by infiltration irrigation at the bottom of the pot, and rice is watered to saturation by irrigation at the top of the pot. After the crops emerge, thinning and transplanting are carried out, leaving 15 crops with basically the same growth in each pot, evenly distributed in the pots.

[0070] Application method: spray the pesticide when the crop is at 3-4 leaf stage, with a spray volume of 350L / ha, 4 replicates per treatment, and a treatment without pesticide as a blank control. Observe the pesticide damage after 14 days and record the fresh weight of the aboveground part of each treatment.

[0071] Phytotoxicity effect expression: refer to the standard NY / T 1155.8-2007 to calculate the fresh weight inhibition rate, the calculation formula is R= , where R represents the fresh weight inhibition rate, X0 represents the control fresh weight, and X1 represents the treated fresh weight.

[0072] Table 1. Safety test of herbicidal composition on corn

[0073]

[0074]

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

[0076]

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

[0078]

[0079] It can be seen from Tables 1-3 that when component A is compound 1, compound 2 and compound 3, it has a good detoxification effect on the herbicide of component B.

[0080] 2.2 Weed control experiment

[0081] Test agents: 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 usage and ratio are shown in Table 4-13 below. Component A is synthesized by our laboratory, and component B herbicide is purchased from the market.

[0082] Test weeds: sieved air-dried soil with an organic matter content of 2.5%, a pH value of about 7, and good permeability was filled to 4 / 5 of the pot, and watered from the top to make the soil completely moist. 35 test weed seeds were evenly sown on the soil surface, covered with soil about 1.0 cm, moved to a greenhouse, and cultured at 20±2℃, and watered in time. Dry field weeds were watered by infiltration irrigation at the bottom of the pot, and paddy field weeds were watered to saturation by irrigation at the top of the pot. After the weeds emerged, thinning and transplanting were carried out, and 15 weeds with basically the same growth were left in each pot.

[0083] Application method: spray the pesticide when the weeds have 3-4 leaves, the spray volume is 350L / ha, 4 replicates are performed for each treatment, and a treatment without pesticide is set as a blank control. After 14 days, observe the weed damage symptoms and growth inhibition, weigh the fresh weight of the aboveground part of the weeds, and calculate the fresh weight inhibition rate (%).

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

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

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

[0087] Table 4 Control effect of component A and tampoxone combination on Setaria viridis

[0088]

[0089] Table 5 Control effect of the combination of component A and isoxathiapiprolin on weeds

[0090]

[0091] Table 6 Control effect of the combination of component A and dicamba on weeds

[0092]

[0093] Table 7 Control effect of component A and foramsulfuron combination on weeds

[0094]

[0095] Table 8 Control effect of the combination of component A and nicosulfuron on weeds

[0096]

[0097] Table 9 Control effect of component A and sulfamethoxam combination on weeds

[0098]

[0099] Table 10 Control effect of the combination of component A and benomyl on weeds

[0100]

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

[0102]

[0103] Table 12 Control effect of the combination of component A and fenoxaprop-ethyl on weeds

[0104]

[0105] Table 13 Control effect of component A and 2-Methyl-4-chloro-1-yl chloride combination on weeds

[0106]

[0107] It can be seen from Table 4-13 that compound 1, compound 2 and compound 3 have a good synergistic effect with specific herbicides within a specific ratio range.

Claims

1. A herbicidal composition, characterized in that The invention comprises component A and component B, wherein component A is one of compound 1, compound 2 and compound 3, and component B is one of tembotrione, isoxathiapiprolin, dicamba, foramsulfuron, nicosulfuron, sulfamethoxam, benomyl, 2,4-D isooctyl, fenoxaprop-butyl and 2-Methyl-4-chloro-1-butyl, ， ， Compound 1 Compound 2 Compound 3.

2. The herbicidal composition according to claim 1, characterized in that The weight ratio of component A to component B is 1:100-100:1, preferably 1:50-20:

1.

3. The herbicidal composition according to claim 1 or 2, characterized in that The component A is selected from compound 1 or compound 2, the component B is selected from tembotrione, and the weight ratio of the component A to the component B is 1:10-1:1, preferably 1:8, 1:4, 1:

2.

4. The herbicidal composition according to claim 1 or 2, characterized in that The component A is selected from compound 1 or compound 2, the component B is selected from isoxathiapiprolin, and the weight ratio of the component A to the component B is 1:10-1:1, more preferably 1:4, 1:2, 1:

1.

5. The herbicidal composition according to claim 1 or 2, characterized in that The component A is selected from compound 1 or compound 2, the component B is selected from dicamba, and the weight ratio of the component A to the component B is 1:50-1:1, more preferably 1:50, 1:30, 1:

20.

6. The herbicidal composition according to claim 1 or 2, characterized in that The component A is selected from compound 1 or compound 3, and the component B is selected from foramsulfuron. The weight ratio of the component A to the component B is 1:20-1:1, more preferably 1:11, 1:5, 1:

1.

7. The herbicidal composition according to claim 1 or 2, characterized in that The component A is selected from compound 1 or compound 2, the component B is selected from fenoxaprop-butyl, and the weight ratio of the component A to the component B is 1:15-1:1, preferably 1:10, 1:5, 1:

2.

8. The herbicidal composition according to claim 1 or 2, characterized in that The component A is selected from compound 1, the component B is selected from nicosulfuron, and the weight ratio of the compound 1 to nicosulfuron is 1:20-1:1, more preferably 1:12, 1:6, 1:4; The component A is selected from compound 1, the component B is selected from sulfasulfuron-methyl, and the weight ratio of the compound 1 to sulfasulfuron-methyl is 1:10-1:1, preferably 1:7, 1:4, 1:2; The component A is selected from compound 1, the component B is selected from benzathine, and the weight ratio of the compound 1 to benzathine is 1:15-1:1, preferably 1:10, 1:5, 1:2; The component A is selected from compound 1, the component B is selected from 2,4-diisooctyl ester, and the weight ratio of compound 1 to 2,4-diisooctyl ester is 1:30-1:1, preferably 1:26, 1:13, 1:10; The component A is selected from compound 1, the component B is selected from 2-methyl-4-chloro-1-yl chloride, and the weight ratio of compound 1 to 2-methyl-4-chloro-1-yl chloride is 1:50-1:1, preferably 1:40, 1:20, 1:

10.

9. A herbicide, characterized in that: The herbicidal composition comprises the herbicidal composition according to any one of claims 1 to 8 and a suitable adjuvant.

10. The herbicide according to claim 9, characterized in that The herbicide can be prepared into a suitable dosage form, preferably an aqueous emulsion, emulsifiable concentrate, suspension, aqueous solution, water-dispersible granules, dust, wettable powder, soluble powder / granules, granules or microcapsule suspension.

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