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 selected from one of tembotrione, isoxaflutole, dicamba, foramsulfuron, nicosulfuron, rimsulfuron, topramezone, 2, 4-D isooctyl ester, fenoxaprop-p-ethyl and MCPA, and the component B is one of tembotrione, isoxaflutole, dicamba, foramsulfuron, nicosulfuron, rimsulfuron, topramezone, 2, 4-D isooctyl ester, fenoxaprop-p-ethyl and MCPA. The component A and the component B in the composition have a good synergistic effect, and the composition has a good application prospect.

Description

[0001] This application is a divisional application of Chinese Patent Application No. 202510157496.1, filed on February 13, 2025, entitled "A Herbicide Composition". Technical Field

[0002] 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

[0003] 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:

[0004] 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-Plunkett (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 corn, sugarcane, sugar beets, fruits and vegetables, cotton, and grains to control 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 seedling emergence, early post-emergence stage, or before planting, with an effective ingredient dosage of 75–140 g / hm².

[0005] 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.

[0006] Formamide sulfonamide is a novel sulfonylurea herbicide that can control many important grass and broadleaf weeds in the world's major corn-producing regions.

[0007] 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.

[0008] 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.

[0009] 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] Safeguards disclosed to date possess a variety of chemical structures. Existing technologies disclose compounds 1, 2, and 3 as potential herbicide safeguards.

[0015]

[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] In view of the defects that the safeners reduce the activity of herbicides when used in combination with herbicides in the prior art, the present application provides a herbicide composition comprising component A and component B, wherein component A can generally act as a safener, and component B is a herbicide commonly used in the art. The composition of the present application can enhance the activity of herbicides while protecting plants from damage by herbicides, and shows excellent synergistic effect in controlling weeds.

[0018] In particular, the present application provides a herbicide composition comprising component A and component B, wherein component A is one of compound 1, compound 2 and compound 3, and component B is one of cloransulam, isoxaflutole, dicamba, foramsulfuron, nicosulfuron, bensulfuron-methyl, carfentrazone-ethyl, 2,4-D ester, fenoxaprop-P-ethyl and 2,4-D,

[0019]

[0020] The present application also provides a herbicide comprising the herbicide composition of the present application and a suitable adjuvant.

[0021] The present application also provides a method for controlling weeds, which comprises contacting vegetation or its environment with a herbicidally effective amount of the herbicide composition of the present application.

[0022] Advantages of the present application

[0023] 1. Component A in the composition of the present application can reduce the toxicity of component B;

[0024] 2. Component A and component B in the composition of the present application show strong synergistic effect when combined in a certain ratio range. DETAILED DESCRIPTION

[0025] The specific embodiments of the present application will be further described in detail below with reference to the examples. In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Unless otherwise explicitly indicated, in the entire specification and claims, the term “comprise” or its variants such as “include” or “contain” and the like will be understood as including the stated components or steps, and excluding other components or steps.

[0026] In addition, for a better illustration of the present application, numerous specific details are set forth in the following detailed description. Those skilled in the art will understand, however, that the application can be practiced without certain specific details. In some instances, well-known materials, methods, techniques, etc. have not been described in detail in order to avoid obscuring the subject matter.

[0027] The present application 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 clomazone, isoxaflutole, dicamba, foramsulfuron, nicosulfuron, bensulfuron-methyl, carfentrazone-ethyl, 2,4-D, fenoxaprop-P-ethyl and MCPA,

[0028]

[0029] Preferably, the weight ratio of the component A and the component B is 1:100-100:1, preferably 1:50-20:1.

[0030] In some embodiments, the component B is clomazone, and the component A is compound 1 or compound 2, and the weight ratio of the component A and the component B is 1:10-1:1, preferably 1:8, 1:4, 1:2. The above range shows a strong synergistic effect.

[0031] In some embodiments, the component B is isoxaflutole, and the component A is compound 1 or compound 2, and the weight ratio of the component A and the component B is 1:10-1:1, more preferably 1:4, 1:2, 1:1. The above range shows a strong synergistic effect.

[0032] In some embodiments, the component B is dicamba, and the component A is compound 1 or compound 2, and the weight ratio of the component A and the component B is 1:50-1:1, more preferably 1:50, 1:30, 1:20. The above range shows a strong synergistic effect.

[0033] In some embodiments, the component B is foramsulfuron, and the component A is compound 1 or compound 3, and the weight ratio of the component A and the component B is 1:20-1:1, more preferably 1:11, 1:5, 1:1. The above range shows a strong synergistic effect.

[0034] In some embodiments, the component A is compound 1 or compound 2, and the component B is fenoxaprop-P-ethyl, and the weight ratio of the component A and the component B is 1:15-1:1, preferably 1:10, 1:5, 1:2. The above range shows a strong synergistic effect of compound 1 or compound 2 and fenoxaprop-P-ethyl.

[0035] In a preferred technical solution, component A is selected from compound 1, component B is selected from nicosulfuron, and the weight ratio of component A to 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.

[0036] In a preferred technical solution, component A is selected from compound 1, component B is selected from sulfometuron, and the weight ratio of compound 1 to sulfometuron is 1:10-1:1, preferably 1:7, 1:4, 1:2; within the above range, compound 1 and sulfometuron show excellent synergistic effect.

[0037] In a preferred technical solution, component A is selected from compound 1, component B is selected from carfentrazone-ethyl, and the weight ratio of compound 1 to carfentrazone-ethyl is 1:15-1:1, preferably 1:10, 1:5, 1:2; within the above range, compound 1 and carfentrazone-ethyl show excellent synergistic effect.

[0038] In a preferred technical solution, component A is selected from compound 1, component B is selected from 2,4-D isooctyl, and the weight ratio of compound 1 to 2,4-D isooctyl is 1:30-1:1, preferably 1:26, 1:13, 1:10; within the above range, compound 1 and 2,4-D isooctyl show excellent synergistic effect.

[0039] In a preferred technical solution, component A is selected from compound 1, component B is selected from 2,4-D isooctyl, and the weight ratio of compound 1 to 2,4-D isooctyl is 1:30-1:1, preferably 1:26, 1:13, 1:10; within the above range, compound 1 and 2,4-D isooctyl show excellent synergistic effect.

[0040] The present application provides a herbicide containing the herbicidal composition described above and a suitable adjuvant. Preferably, the herbicide of the present application can be prepared into conventional dosage forms in the art, including water emulsion, emulsifiable concentrate, suspension concentrate, water agent, water dispersible granule, powder, wettable powder, soluble powder / granule, granule or microcapsule suspension concentrate, etc.

[0041] The adjuvant in the herbicide of the present application includes one or more of emulsifiers, dispersants, wetting agents, penetrants, antifreezes, stabilizers, antifoaming agents, preservatives, thickeners, disintegrants, binders, fillers / carriers, solvents, cosolvents, etc.

[0042] The emulsifier is selected from one or more of 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., agricultural emulsifier series: agricultural emulsifier 601#, agricultural emulsifier 602#, agricultural emulsifier 603#, agricultural emulsifier 604#, agricultural emulsifier 401#, agricultural emulsifier 402#, agricultural emulsifier 700#, agricultural emulsifier 33#, agricultural emulsifier 34#, agricultural emulsifier 1601#, agricultural emulsifier 1602#, etc., Tween series: Tween-20, Tween-40, Tween-60, Tween-65, Tween-80, Tween-85, etc., castor oil polyoxyethylene ether, polyoxyethylene oleate, ethylene oxide / propylene oxide copolyether, polyglycerol fatty acid ester, calcium dodecylbenzenesulfonate, polyoxyethylene ether sulfate ester salt, polyoxyethylene ether phosphate ester salt, etc.

[0043] The dispersant is preferably one or more of succinic acid bis ester sodium sulfonate, polycarboxylate, naphthalene or alkyl naphthalene formaldehyde condensate sulfonate, phosphate ester salt, polyoxyethylene polypropylene ether block copolymer, lignin sulfonate, fatty alcohol polyoxypropylene polyoxyethylene ether, polyoxyethylene ether sulfate ester salt, etc.

[0044] The wetting agent / penetrant is preferably one or more of castor oil polyoxyethylene ether: including BY-110, BY-125, BY-140, etc., alkyl phenol polyoxyethylene ether: including NP, TX, OP series, etc., fatty alcohol ether: including MOA series, isomeric alcohol ether 1300 series, penetrant JFC, emulsifier AEO, etc., fatty amine polyoxyethylene ether: including AC-1800 series, AN-1800 series, AC-1200 series, etc., polyaryl phenol polyoxyethylene ether: including agricultural emulsifier 600#, agricultural emulsifier 400#, agricultural emulsifier 33#, agricultural emulsifier 34#, etc., alkyl glycoside: including C12-C14 alkyl glycoside, C8-C10 alkyl glycoside, C8-C14 alkyl glycoside, etc., alkyl succinate sodium sulfonate: including fast T, etc., polycyclic aromatic hydrocarbon formaldehyde condensate sulfonate or alkyl aromatic sulfonate: including diffuser NNO, pull powder BX, etc., fatty alcohol ether sulfate sodium salt AES, calcium dodecylbenzenesulfonate, α-alkenyl sulfonate sodium, etc.

[0045] The antifreeze agent is preferably one or more of sodium nitrite, calcium nitrite, carbonate, calcium chloride, magnesium chloride, sodium acetate, methanol, ethanol, isopropyl alcohol, ethylene glycol, propylene glycol, glycerol, diethylene glycol, ethylene glycol butyl ether, propylene glycol butyl ether, polyethylene glycol, urea, etc.

[0046] The stabilizer is preferably one or more of epoxidized soybean oil, epichlorohydrin, phosphite, epoxidized linseed oil, BHA, BHT, etc.

[0047] Antifoaming agent is preferably one or more of silicone oil, propanol, butanol, tributyl phosphate, polyether surfactant, polyethylene glycol fatty acid ester, mineral oil, etc.

[0048] 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, etc.

[0049] Thickening agent is preferably one or more of sodium chloride, ammonium sulfate, ammonium chloride, magnesium aluminum silicate, xanthan gum, starch, agar, hydroxymethyl cellulose, hydroxypropyl methyl cellulose, diatomite, organic bentonite, polyvinyl alcohol, etc.

[0050] Disintegrant is preferably one or more of sodium carboxymethyl starch, sodium cross-linked carboxymethyl starch, cross-linked carboxymethyl cellulose, modified starch, cross-linked polyvinyl pyrrolidone, magnesium aluminum silicate, sodium alginate, etc.

[0051] Binder is selected from one or more of starch, gelatin and gum arabic, povidone, sucrose, glucose, dextrin.

[0052] Carrier / filler is preferably one or more of diatomite, attapulgite, bentonite, zeolite, sepiolite, kaolin, pottery clay, white carbon, light calcium carbonate, starch, magnesium stearate, talc, etc.

[0053] Solvent and co-solvent are selected from one or more of 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, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, isoamyl alcohol, sec-octyl alcohol, nonyl alcohol, cyclohexanol, dichloromethane, trichloromethane, cyclohexanone, N-methyl pyrrolidone, acetate, etc. Specific embodiments

[0055] I. Preparation of embodiments

[0056] 1.1 Synthesis of compound 1

[0057]

[0058] Take 8.6 g of p-aminosulfonyl benzoic acid, dissolve it with ethanol, add 0.43 g of concentrated sulfuric acid, and reflux for 2 h; after cooling, add 13.6 g of MgO / KL (loading rate 5%, 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 2-chlorobenzoic acid ethyl ester, and react at 50°C for 2 h; after the reaction is completed, filter, remove the solvent from the filtrate, and recrystallize to obtain 14.3 g of the target product.

[0059] 1.2 Synthesis of compound 2

[0060]

[0061] Take 8.6 g of p-amino sulfonate benzoic acid, dissolved with ethanol, add 0.43 g of concentrated sulfuric acid, heat to reflux for 2 h; after cooling, add 13.6 g of MgO / KL (loading rate 5%, weight percentage) and 3.0 g of isopropylamine, react at 40°C for 2 h; after cooling, add 7.9 g of 2-chlorobenzoic acid ethyl ester, react at 50°C for 2 h, after the reaction is completed, filter, remove the solvent from the filtrate, and recrystallize to obtain 14.8 g of the target product.

[0062] 1.3 Synthesis of compound 3

[0063]

[0064] Take 8.6 g of p-amino sulfonate benzoic acid, dissolved with ethanol, add 0.43 g of concentrated sulfuric acid, heat to reflux for 2 h; after cooling, add 13.6 g of MgO / KL (loading rate 5%, weight percentage) and 2.9 g of cyclopropylamine, react at 40°C for 2 h; after cooling, add 7.9 g of 2-chlorobenzoic acid ethyl ester, react at 50°C for 2 h, after the reaction is completed, filter, remove the solvent from the filtrate, and recrystallize to obtain 14.8 g of the target product.

[0065] II. Bioactivity test

[0066] 2.1 Safety experiment

[0067] Test agent: Take a certain amount of component A and component B, dissolve with acetone as solvent, dilute with 0.1% Tween 80 aqueous solution for use, the specific use amount and ratio are shown in Tables 1-3, wherein the herbicide of component B is purchased from the market, and component A is synthesized by the laboratory.

[0068] Test crop: Take sieved and air-dried soil with organic matter content of 3%, good permeability, and pH 7, fill the soil into pots to 4 / 5 of the pot, water from the top to completely wet the soil, evenly spread 35 seeds of the test crop on the surface of the soil, cover with soil about 1.0 cm, move to a greenhouse, cultivate at 20±2°C, water corn and wheat by bottom drip irrigation, and water rice by top irrigation until saturation, after the crops germinate, thin and plant, leave 15 plants with basically consistent growth in each pot, and evenly distribute in the pot.

[0069] Application method: spray the agent at the 3-4 leaf stage of the crop, the amount of spray liquid is calculated according to 350 L / ha, 4 repeats are set for each treatment, and a treatment without the agent is set as a blank control, observe the phytotoxicity after 14 days, and record the fresh weight of the aboveground part of each treatment.

[0070] Phytotoxicity effect: the fresh weight inhibition rate was calculated according to the standard NY / T 1155.8-2007, and the calculation formula was wherein R represents the fresh weight inhibition rate, X0 represents the control fresh weight, and X1 represents the treatment fresh weight.

[0071] Table 1, herbicidal composition safety experiment on corn

[0072]

[0073]

[0074]

[0075] Table 2, herbicidal composition safety experiment on wheat

[0076]

[0077] Table 3, herbicidal composition safety experiment on rice

[0078]

[0079]

[0080] From Tables 1-3, it can be seen that the component A, which is compound 1, compound 2 and compound 3, has good detoxification effect on the herbicide of component B.

[0081] 2.2 weed control experiment

[0082] Test agent: a certain amount of component A and component B were weighed, dissolved with acetone as solvent, and diluted with 0.1% Tween 80 aqueous solution for use. The specific use amount and ratio are shown in Tables 4-13 below. The component A was synthesized by the laboratory, and the component B herbicide was purchased from the market.

[0083] Test weeds: the sieved and air-dried soil with organic matter content of 2.5%, pH value of about 7 and good permeability was filled to 4 / 5 of the pot, water was poured from the top to completely wet the soil, 35 test weed seeds were evenly sown on the surface of the soil, and the soil was covered by about 1.0 cm. The pots were moved to the greenhouse for cultivation at 20±2℃, and water was supplemented in time. The upland weeds were supplemented with water by the way of bottom infiltration irrigation, and the paddy field weeds were supplemented with water by the way of top irrigation until saturation. After the weeds germinated, the seedlings were thinned and planted, and 15 weed seedlings with basically the same growth were left in each pot.

[0084] Application method: the test agent was sprayed on the weeds at the 3-4 leaf stage, the spraying amount was calculated according to 350L / ha, 4 repeats were set for each treatment, and a treatment without the test agent was set as a blank control. After 14 days, the damage symptoms and growth inhibition of the weeds were observed, the fresh weight of the aboveground part of the weeds was weighed, and the fresh weight inhibition rate (%) was calculated.

[0085] Fresh weight inhibition rate (%) = (control fresh weight - treated fresh weight) / control fresh weight x 100.

[0086] Synergistic effect evaluation method: the Gowing method was used to evaluate the synergistic effect of herbicides, and the formula was: wherein X is the fresh weight inhibition rate when the amount of formula I compound is P; Y is the fresh weight inhibition rate when the amount of herbicide B is Q; E0 is the theoretical control effect when the amount of formula I compound is P and the amount of herbicide B is Q; E is the actual control effect after formula I compound and herbicide B are mixed according to the above.

[0087] When E-E0>10%, it is indicated as synergistic effect, when E-E0is between ±10%, it is indicated as additive effect, and when E-E0<-10%, it is indicated as antagonistic effect.

[0088] Table 4 Control effect of component A combined with cloransulam-methyl on setaria viridis

[0089]

[0090]

[0091] Table 5 Control effect of component A combined with isoxaflutole on weeds

[0092]

[0093]

[0094] Table 6 Control effect of component A combined with dicamba on weeds

[0095]

[0096]

[0097] Table 7 Control effect of component A combined with foramsulfuron on weeds

[0098]

[0099]

[0100] Table 8 Control effect of component A combined with nicosulfuron on weeds

[0101]

[0102]

[0103] Table 9 Control effect of component A combined with sulfometuron-methyl on weeds

[0104]

[0105] Table 10 Weed control effect of the composition of component A and carfentrazone ethyl

[0106]

[0107]

[0108] Table 11 Weed control effect of the composition of component A and 2,4-D isooctyl

[0109]

[0110] Table 12 Weed control effect of the composition of component A and fenoxaprop-P-ethyl

[0111]

[0112]

[0113] Table 13 Weed control effect of the composition of component A and 2,4-D isooctyl

[0114]

[0115] From Tables 4-13, it can be seen that compound 1, compound 2 and compound 3 have good synergistic effect with specific herbicides in 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 isoxaflotole, the weight ratio of the component A and the component B is 1:50-20:

1.

2. The herbicidal composition according to claim 1, characterized by the component A is selected from the group consisting of compound 1 or compound 2, the component B is selected from the group consisting of isoxaflotole, and the weight ratio of the component A and the component B is 1:10-1:

1.

3. The herbicidal combination according to claim 2, wherein the weight ratio of the component A and the component B is 1:4, 1:2, 1:

1.

4. A herbicide, characterized by comprising: a herbicidal composition as claimed in any one of claims 1-3 and a suitable adjuvant.

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

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