Compound weeding composition containing glyphosate

Abstract

The invention discloses a compound weeding composition containing glyphosate, the effective components of the weeding composition comprise A, B and C, A is glyphosate, B is bromoxynil octanoate, C is fluthiacet-methyl, and the weight percentage of glyphosate is 30%-65%, the weight percentage of bromoxynil octanoate is 4%-15%, and the weight percentage of fluthiacet-methyl is 0.1%-5%. The composition can be prepared into wettable powder, water dispersible granules and an oil suspending agent. The weeding composition disclosed by the invention is used for preventing and controlling weeds in a glyphosate-resistant transgenic corn field, and mainly aims at annual or perennial gramineae and broadleaf weeds.

Description

[0001] This application is a divisional application of the Chinese invention patent application. The original application date is December 7, 2022, application number: 2022115608832, the name of the invention: A compound herbicide composition containing glyphosate, publication number: CN118140939A; the applicant filed a divisional application. Technical Field

[0002] The present invention relates to a compound herbicide composition containing glyphosate, in particular to a ternary compound pesticide composition containing glyphosate, bromoxynil octanoyl and fluthiacet-methyl and its application, belonging to the technical field of pesticide preparation. Background Art

[0003] Glyphosate is a non-selective, residue-free, and lethal herbicide. It is highly effective against perennial, deep-rooted, and malignant weeds and is widely used in agriculture, forestry, and horticulture. It primarily inhibits the enzyme enolpyruvylshikimate synthase in plants, thereby inhibiting the conversion of shikimate to phenylalanine, tyrosine, and tryptophan, disrupting protein synthesis and leading to plant death. Due to the continued expansion of genetically modified crop cultivation worldwide, demand for glyphosate has grown rapidly, making it the world's best-selling pesticide. However, as glyphosate usage increases, weed resistance is becoming increasingly serious.

[0004] Bromoxynil octanoate is a benzonitrile contact herbicide with certain systemic activity. It is mainly absorbed by leaves and undergoes extremely limited conduction within the plant body. It inhibits various processes of photosynthesis, causing rapid necrosis of plant tissues. It can be used to control annual and perennial broadleaf weeds, but it has high selectivity for grass weeds and a narrow herbicide spectrum.

[0005] Filthiacet-methyl is a selective post-emergence herbicide that inhibits protoporphyrinogen oxidase (PPO) in the chloroplasts of sensitive plants, causing the accumulation of PPO and cell membrane necrosis, leading to plant death. It is mainly used to control annual broadleaf weeds in soybean and corn fields, but it is not very effective in controlling grass weeds.

[0006] With the continued promotion and expansion of glyphosate-tolerant genetically modified corn, weed control in these fields has encountered numerous challenges, including the difficulty in controlling malignant weeds and ineffective broadleaf weed control. The most serious issue is the overuse of glyphosate herbicides, which can easily lead to phytotoxicity. Therefore, there is an urgent need to develop new herbicide products that require less application and offer improved weed control. However, due to regulatory restrictions, tallow amine polyoxyethylene ether, a glyphosate synergist, is prohibited for use on genetically modified crops. Choosing a new synergist formulation is currently a challenge for glyphosate herbicides. Summary of the Invention

[0007] The technical problem to be solved by the present invention is to address the deficiencies in the prior art and provide a compounded herbicide composition containing glyphosate. The present invention compounds glyphosate with bromoxynil and fluthiacet-methyl. The bromoxynil, which has a low melting point, is applied to a solid formulation through a special process. Synergists with different ratios are studied to screen out a low-cost, high-efficiency synergist composition. The pesticide composition of the present invention is a ternary compound formulation of glyphosate, bromoxynil, and fluthiacet-methyl, which can be used to control weeds in glyphosate-resistant transgenic corn fields. The pesticide composition has high weed control efficiency, wide target coverage, and is not susceptible to drug resistance. The pesticide composition of the present invention significantly improves weed control efficiency without affecting the survival rate of corn, and is highly efficient, economical, and safe. The pesticide composition of the present invention, when combined with the synergist, has the advantages of high cost-effectiveness and good synergistic effect.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] The present invention first provides a compound herbicidal composition containing glyphosate, wherein the active ingredients are compounded from component A, component B and component C, and the total weight of the active ingredients accounts for 34.1% to 85% of the total weight of the compound herbicidal composition, and the remainder is adjuvants;

[0010] The component A is glyphosate, the component B is bromoxynil octanoyl, and the component C is fluthiacet-methyl.

[0011] In the above technical solution, the total weight of the active ingredients preferably accounts for 35.2% to 69% of the total weight of the compound herbicidal composition.

[0012] In the above technical solution, the weight ratio of component A, component B and component C is (30-65): (4-15): (0.1-5), preferably (30-55): (5-12): (0.2-2).

[0013] In the above technical solution, the auxiliary agent is one or more of a dispersant, an emulsifier, a wetting agent, a thickener, a disintegrant, a binder, a synergist, an oil phase medium or a carrier.

[0014] In the above technical solution, the compound herbicidal composition is in the form of a wettable powder, a water-dispersible granule or an oil suspension, preferably an oil suspension.

[0015] In the above technical solution, the compound herbicidal composition, when in the form of a wettable powder, comprises the following raw materials in weight percentage: 30% to 55% of glyphosate, 5% to 12% of bromoxynil octanoate, 0.2% to 2% of methicillin-methyl, 4% to 15% of dispersant, 1% to 5% of wetting agent, 0% to 10% of synergist (preferably 5% to 9%), and the carrier is supplemented to 100%.

[0016] In the above technical solution, the compound herbicidal composition is in the form of water-dispersible granules, comprising the following raw materials in weight percentage: 30% to 55% glyphosate, 5% to 12% bromoxynil octanoyl, 0.2% to 2% methensulfuron methyl, 3% to 9% dispersant, 1% to 5% wetting agent, 0.5% to 5% disintegrant, 0.5% to 1% binder, 0% to 10% (preferably 5% to 9%) synergist, and the carrier is supplemented to 100%.

[0017] In the above technical solution, the compound herbicidal composition, when in the form of an oil suspension, comprises the following raw materials in weight percentage: 30% to 35% glyphosate, 5% to 10% bromoxynil octanoyl, 0.5% to 1.5% methotrexate methyl, 3.5% to 10% emulsifier, 1% to 8% dispersant, 0.5% to 2% thickener, 0% to 10% (preferably 5% to 9%) synergist, and the oil phase medium is supplemented to 100%.

[0018] In the above technical solution, the dispersant is selected from: sodium salt of polycarboxylate, sodium methylene naphthalene sulfonate, sodium lignin sulfonate, sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate, sodium salt of naphthalenesulfonic acid formaldehyde condensate, alkylphenol polyoxyethylene ether, fatty amine polyoxyethylene ether, fatty acid polyoxyethylene ester, glycerol fatty acid ester polyoxyethylene ether, or a mixture of two or more of them in any proportion.

[0019] In the above technical solution, the wetting agent is selected from: any one of alkylbenzene polyoxyethylene ether phosphate, phenylethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate (for example, TERSPERSE 2425, produced by Huntsman Corporation of the United States), sodium lauryl sulfate, opening powder BX, wetting and penetrating agent F, sodium dodecylbenzene sulfonate, and detergent LS, or a mixture of two or more in any proportion.

[0020] In the above technical solution, the emulsifier is selected from: any one of phenylethylphenol formaldehyde resin polyoxyethyl ether, phenylethylphenol polyoxyethyl polypropylene ether, ethylene oxide-propylene oxide block copolymer, alkylaryl polyoxypropylene polyoxyethylene ether, fatty acid polyoxyethylene ether sulfosuccinate monoester disodium, sorbitan monooleate, sorbitan fatty acid ester polyoxyethylene ether, fatty alcohol-ethylene oxide condensate, polyoxyethylene fatty acid ester, or a mixture of two or more in any proportion.

[0021] In the above technical solution, the synergist is selected from: any one of alkyl glucoside, cocamidopropyl betaine, alkylamine polyoxyethylene ether quaternary ammonium salt, and alkoxy-modified polytrisiloxane, or a mixture of two or more in any proportion. Preferably, the combination of cocamidopropyl betaine + alkylamine polyoxyethylene ether quaternary ammonium salt + alkoxy-modified polytrisiloxane is selected, and more preferably, the combination of 4% cocamidopropyl betaine + 2% alkylamine polyoxyethylene ether quaternary ammonium salt + 1% alkoxy-modified polytrisiloxane or the combination of 2% cocamidopropyl betaine + 4% alkylamine polyoxyethylene ether quaternary ammonium salt + 1% alkoxy-modified polytrisiloxane is selected.

[0022] In the above technical solution, the disintegrant is selected from: any one of ammonium sulfate, urea, succinic acid, sodium bicarbonate, and aluminum chloride, or a mixture of two or more of the same in any proportion.

[0023] In the above technical solution, the binder is selected from: any one of dextrin, methyl cellulose, and polyvinyl pyrrolidone, or a mixture of two or more of them in any proportion.

[0024] In the above technical solution, the thickener is selected from: any one of organic bentonite, xanthan gum, hydroxyethyl cellulose, and magnesium aluminum silicate, or a mixture of two or more of the above in any proportion.

[0025] In the above technical solution, the oil phase medium is selected from: any one of corn oil, rapeseed oil, soybean oil, sunflower oil, peanut oil, methyl oleate, turpentine, and methylated soybean oil, or a mixture of two or more in any proportion.

[0026] In the above technical solution, the carrier is a mixture of white carbon black and other carriers in any proportion; the other carriers are selected from: any one of kaolin, clay, diatomaceous earth, attapulgite, starch, and light calcium carbonate, or a mixture of two or more in any proportion.

[0027] The present invention also provides use of the compound herbicidal composition containing glyphosate in controlling annual or perennial grass and broadleaf weeds on glyphosate-resistant transgenic corn.

[0028] In the above technical solution, the annual or perennial grasses and broad-leaved weeds include barnyard grass, foxtail grass, foxtail herb, goosegrass, crabgrass, quinoa, cleaver, cyperus rotundus, wild oats, chickweed, velvet, shepherd's purse, poppy, polygonum, nightshade, Xanthium sibiricum, field bindweed, alternator, duckweed, aralia, amaranth, and prickly lettuce.

[0029] The present invention effectively solves the weed resistance problem by compounding glyphosate, bromoxynil octanoate, and fluthiacet-methyl, reduces the dosage of the drug, reduces the cost of application, and is environmentally safe. Compared with the existing technology, it has the following characteristics:

[0030] 1) Expanded weed control spectrum: The present invention can simultaneously control grass and broadleaf weeds, and is very effective against difficult-to-control malignant weeds.

[0031] 2) Delaying the development of resistance. The ternary compound involved in the present invention has a significant synergistic effect after compounding due to its different mechanisms of action, which can thoroughly kill weeds while making it difficult for weeds to develop resistance.

[0032] 3) Good safety. The pesticide composition of the present invention is safe for glyphosate-resistant transgenic corn, has a short residual time in the soil, and is safe for subsequent crops. At the same time, the synergistic effect after compounding further reduces the dosage of the pesticide, reducing the risk of pesticide damage.

[0033] 4) Significant synergistic effect. The use of multiple synergists in combination rationally utilizes the characteristics of different synergists, reduces the amount of synergists used while ensuring the weed control effect, and saves production costs.

[0034] 5) Unique process: Through extensive testing, the present invention can apply low-melting-point technical drugs and liquid synergists to solid preparations, eliminating the need for tank mixing of synergists during use, making it more convenient to use. DETAILED DESCRIPTION

[0035] The following describes in detail the specific implementation of the technical solution of the present invention, but the present invention is not limited to the following description:

[0036] The wettable powder is prepared in the laboratory by heating bromoxynil octanoyl and then adsorbing it with white carbon at a weight ratio of 1:1. The synergist is then adsorbed with white carbon at a weight ratio of 1:1. After the synergist is adsorbed, it is dried at 50-60°C and mechanically crushed to form a solid synergist. The two adsorbed materials are then mixed with glyphosate, methotrexate-methyl, a dispersant, a wetting agent, and a carrier. The mixture is mixed evenly in a mixer, crushed in a jet mill, and then mixed evenly again to form the wettable powder product of the present invention.

[0037] The water-dispersible granules are prepared in the laboratory by heating bromoxynil octanoyl and then adsorbing it with white carbon black in a weight ratio of 1:1. The mixture is then mixed evenly with glyphosate, flumethoxetine methyl, a dispersant, a wetting agent, a disintegrant, a binder, and a carrier. The mixture is crushed with a jet mill and set aside. The synergist is mixed evenly with water, mixed with the reserved powder, kneaded and granulated, and dried to produce the water-dispersible granules of the present invention.

[0038] The oil suspension concentrate is prepared in the laboratory by mixing glyphosate, bromoxynil capryloyl, fluthiacet-methyl, an emulsifier, a dispersant, a synergist, a thickener, and an oil phase medium, shearing the mixture uniformly with a high-speed shearing machine, and then sand-grinding the mixture in a sand mill until 90% of the particles have a diameter of less than 5 microns to produce the oil suspension concentrate of the present invention.

[0039] The present invention will be described below in conjunction with specific embodiments:

[0040] Formulation Example 1: 38.5% glyphosate, bromoxynil, fluazifop-methyl wettable powder

[0041] Glyphosate 30%, bromoxynil 8%, methotrexate 0.5%, sodium methylenenaphthalate 5%, sodium lignin sulfonate 4%, sodium lauryl sulfate 1%, cocamidopropyl betaine 4%, alkylamine polyoxyethylene ether quaternary ammonium salt 2%, alkoxy modified polytrisiloxane 1%, white carbon black 15%, clay to make up to 100%.

[0042] Formulation Example 2: 38% glyphosate, bromoxynil, fluazifop-methyl wettable powder

[0043] Glyphosate 30%, bromoxynil 8%, methensulfonate 0.5%, sodium methylenenaphthalate 5%, lignin sulfonate 4%, sodium lauryl sulfate 1%, white carbon black 8%, and clay to make up to 100%.

[0044] Formulation Example 3: 36% glyphosate, bromoxynil, fluazifop-methyl wettable powder

[0045] Glyphosate 30%, bromoxynil 5.5%, methotrexate methyl 0.5%, sodium lignin sulfonate 5%, sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate 2%, BX powder 1%, cocamidopropyl betaine 4%, alkylamine polyoxyethylene ether quaternary ammonium salt 2%, alkoxy modified polytrisiloxane 1%, white carbon black 12.5%, diatomaceous earth is made up to 100%.

[0046] Formulation Example 4: 36% glyphosate, bromoxynil, fluazifop-methyl wettable powder

[0047] Glyphosate 30%, bromoxynil 5.5%, methotrexate 0.5%, sodium lignin sulfonate 5%, sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate 2%, BX powder 1%, white carbon black 5.5%, diatomaceous earth is made up to 100%.

[0048] Formulation Example 5: 52% glyphosate, bromoxynil, fluazifop-methyl wettable powder

[0049] Glyphosate 40%, bromoxynil 10%, methotrexate 2%, sodium polycarboxylate 6%, sodium lignin sulfonate 4%, BX powder 2%, cocamidopropyl betaine 2%, alkylamine polyoxyethylene ether quaternary ammonium salt 4%, alkoxy modified polytrisiloxane 1%, white carbon black 17%, diatomaceous earth is supplemented to 100%.

[0050] Formulation Example 6: 52% glyphosate, bromoxynil, fluazifop-methyl wettable powder

[0051] Glyphosate 40%, bromoxynil 10%, methotrexate 2%, sodium polycarboxylate 6%, sodium lignin sulfonate 4%, BX powder 2%, white carbon black 10%, diatomaceous earth to 100%.

[0052] Formulation Example 7: 42% glyphosate, bromoxynil, fluazifop-methyl water dispersible granules

[0053] Glyphosate 35%, bromoxynil 5%, methyl methenamine 2%, sodium polycarboxylate 7%, detergent LS2%, urea 3%, polyvinyl pyrrolidone 0.5%, cocamidopropyl betaine 4%, alkylamine polyoxyethylene ether quaternary ammonium salt 2%, alkoxy modified polytrisiloxane 1%, white carbon black 12%, kaolin is added to 100%.

[0054] Formulation Example 8: 42% glyphosate, bromoxynil, fluazifop-methyl water dispersible granules

[0055] Glyphosate 35%, bromoxynil 5%, methotrexate 2%, sodium polycarboxylate 7%, detergent LS 2%, urea 3%, polyvinyl pyrrolidone 0.5%, white carbon black 5%, kaolin to 100%.

[0056] Formulation Example 9: 43% glyphosate, bromoxynil, fluazifop-methyl water dispersible granules

[0057] Glyphosate 30%, bromoxynil 12%, methyl methensulfate 1%, sodium sulfate of alkylphenol polyoxyethylene ether formaldehyde condensate 7%, sodium lauryl sulfate 2%, detergent LS1%, urea 4%, dextrin 1%, cocamidopropyl betaine 4%, alkylamine polyoxyethylene ether quaternary ammonium salt 2%, alkoxy modified polytrisiloxane 1%, white carbon black 19%, kaolin to 100%.

[0058] Formulation Example 10: 43% glyphosate, bromoxynil, fluazifop-methyl water dispersible granules

[0059] Glyphosate 30%, bromoxynil 12%, methotrexate methyl 1%, alkylphenol polyoxyethylene ether formaldehyde condensate sodium sulfate 7%, sodium lauryl sulfate 2%, detergent LS1%, urea 4%, dextrin 1%, white carbon black 12%, kaolin to 100%.

[0060] Formulation Example 11: 62% glyphosate, bromoxynil, fluazifop-methyl water dispersible granules

[0061] Glyphosate 55%, bromoxynil 5%, methotrexate 2%, naphthalenesulfonic acid formaldehyde condensate sodium salt 4%, sodium lignin sulfonate 2%, sodium lauryl sulfate 2%, urea 3%, dextrin 1%, cocamidopropyl betaine 2%, alkylamine polyoxyethylene ether quaternary ammonium salt 4%, alkoxy modified polytrisiloxane 1%, white carbon black 12%, kaolin to 100%.

[0062] Formulation Example 12: 62% glyphosate, bromoxynil, fluazifop-methyl water dispersible granules

[0063] Glyphosate 55%, bromoxynil 5%, methotrexate 2%, naphthalenesulfonic acid formaldehyde condensate sodium salt 4%, sodium lignin sulfonate %, sodium lauryl sulfate 2%, urea 3%, dextrin 1%, white carbon black 5%, kaolin to 100%.

[0064] Formulation Example 13: 36.5% glyphosate, bromoxynil, fluazifop-methyl oil suspension

[0065] Glyphosate 30%, bromoxynil 5%, methyl methotrexate 1.5%, phenylethylphenol formaldehyde resin polyoxyethylene ether 10%, alkylphenol polyoxyethylene ether 2%, fatty amine polyoxyethylene ether 1.5%, organic bentonite 0.65%, cocamidopropyl betaine 4%, alkylamine polyoxyethylene ether quaternary ammonium salt 2%, alkoxy modified polytrisiloxane 1%, methylated soybean oil is supplemented to 100%.

[0066] Formulation Example 14: 36.5% glyphosate, bromoxynil, fluazifop-methyl oil suspension

[0067] Glyphosate 30%, bromoxynil 5%, methensulfuron methyl 1.5%, phenylethylphenol formaldehyde resin polyoxyethylene ether 10%, alkylphenol polyoxyethylene ether 2%, fatty amine polyoxyethylene ether 1.5%, organic bentonite 0.65%, methylated soybean oil to 100%.

[0068] Formulation Example 15: 39% glyphosate, bromoxynil, fluazifop-methyl oil suspension

[0069] Glyphosate 30%, bromoxynil 8%, methyl methensulfate 1%, phenylethylphenol polyoxyethyl polypropylene ether 10%, alkylphenol polyoxyethylene ether 2%, fatty amine polyoxyethylene ether 2%, organic bentonite 0.5%, cocamidopropyl betaine 4%, alkylamine polyoxyethylene ether quaternary ammonium salt 2%, alkoxy modified polytrisiloxane 1%, methyl oleate is made up to 100%.

[0070] Formulation Example 16: 39% glyphosate, bromoxynil, fluazifop-methyl oil suspension

[0071] Glyphosate 30%, bromoxynil 8%, methotrexate 1%, phenylethylphenol polyoxyethyl polypropylene ether 10%, alkylphenol polyoxyethylene ether 2%, fatty amine polyoxyethylene ether 2%, organic bentonite 0.5%, methyl oleate to 100%.

[0072] Formulation Example 17: 38% glyphosate, bromoxynil, fluazifop-methyl oil suspension

[0073] Glyphosate 30%, bromoxynil 6%, methotrexate 2%, ethylene oxide-propylene oxide block copolymer 8%, alkylphenol polyoxyethylene ether 2%, fatty acid polyoxyethylene ether 2%, organic bentonite 0.5%, cocamidopropyl betaine 2%, alkylamine polyoxyethylene ether quaternary ammonium salt 4%, alkoxy modified polytrisiloxane 1%, methyl oleate to 100%.

[0074] Formulation Example 18: 38% glyphosate, bromoxynil, fluazifop-methyl oil suspension

[0075] Glyphosate 30%, bromoxynil 6%, methotrexate 2%, ethylene oxide-propylene oxide block copolymer 8%, alkylphenol polyoxyethylene ether 2%, fatty acid polyoxyethylene ether 2%, organic bentonite 0.5%, methyl oleate to 100%.

[0076] Application Example 1: Evaluation of Joint Action

[0077] In order to verify that the ternary combination of glyphosate, bromoxynil octanoate and fluthiacet-methyl has a good synergistic effect, the inventors used room temperature pot plants to conduct a weed control effect test to evaluate their combined effect.

[0078] Test targets: Grass weeds Crabgrass and broadleaf weeds Amaranthus retroflexus;

[0079] Test agents: Using the same adjuvants and oil phase medium, glyphosate, bromoxynil, and fluthiazolin-methyl were each formulated into a single oil suspension concentrate with an active ingredient content of 20% (without adding a synergist). The 20% glyphosate oil suspension was diluted with water to 75 g ai / ha, 150 g ai / ha, and 300 g ai / ha; the 20% bromoxynil oil suspension was diluted with water to 20 g ai / ha, 40 g ai / ha, and 80 g ai / ha; the 20% fluthiazolin-methyl oil suspension was diluted with water to 0.625 g ai / ha, 1.25 g ai / ha, and 2.5 g ai / ha; blank control solution: Using the same adjuvants and oil phase medium, a sample without active ingredient was prepared, and then diluted with water according to the minimum dilution factor of 300 among the above concentrations.

[0080] Test Method: The Colby method was used to test the activity of the mixed agents against crabgrass and Amaranthus retroflexus. Twenty seeds of the test weeds were evenly sown in 6-cm-high, 9-cm-diameter plastic pots filled with a predetermined amount of soil. The pots were covered with 0.5-1 cm of fine soil and incubated at room temperature (approximately 20°C). The prepared formulations were then compounded and diluted to a defined concentration gradient. When the weeds reached the 2-4 leaf stage, the stems and leaves were sprayed with 1 ml of solution per pot. Four replicates were used for each treatment, with a blank solution used as a control. After treatment, the test materials were incubated at room temperature, and the weed growth was regularly observed. After 15 days, the target weeds were visually inspected for damage symptoms and growth inhibition. The fresh weight of each plant was measured, and the fresh weight inhibition rate (%) was calculated.

[0081] Control effect (%) = (fresh weight of control group - fresh weight of treatment group) / fresh weight of control group × 100

[0082] The action evaluation method is based on the Colby method for evaluating the combined action mode of herbicides (NY / T 1155.7-2006), and the formula is as follows: E0=X+Y+Z.

[0083] Wherein, X is the percentage of the fresh weight inhibition rate of glyphosate on the target weeds at a certain dosage unit compared to the control; Y is the percentage of the fresh weight inhibition rate of bromoxynil octanoate on the target weeds at a certain dosage unit compared to the control; Z is the percentage of the fresh weight inhibition rate of fluthiacet-methyl on the target weeds at a certain dosage unit compared to the control; E0 is the theoretical value of the weed inhibition of the three active ingredients; E is the measured value of the weed inhibition of the three active ingredients; when E-E0>10%, it is a synergistic effect; E-E0<-10% is an antagonistic effect; and when E-E0 is between ±10%, it is an additive effect.

[0084] Table 1 The herbicidal activity test results of three active ingredients in different ratios against crabgrass

[0085]

[0086]

[0087]

[0088] Table 2 The herbicidal activity test results of different ratios of the three active ingredients against Amaranthus retroflexus

[0089]

[0090]

[0091] As can be seen from Tables 1 and 2, the ternary combination of glyphosate, bromoxynil octanoate and fluthiacet-methyl has a good synergistic effect on the control of crabgrass and Amaranthus retroflexus, with E-E0 both greater than 10%.

[0092] Application Example 2: Experiment on the effect of different ratios of synergists on weed control

[0093] Test agent: Preparation Example 4

[0094] Test method: Cultivate potted crabgrass at room temperature until it grows to the 2-4 leaf stage, dilute the preparation 500 times, add the synergist to the dilution and mix it in a tank, then spray the stems and leaves of the crabgrass, spraying 1 ml of the medicine per pot, and replicate 4 times for each treatment.

[0095] Table 3 Effect of synergists on drug efficacy

[0096] Name of synergist Amount added to diluent Preventive effect 15 days after application (%) No Addition —— 78.9 Alkyl glycosides 0.02g 85.1 Cocamidopropyl Betaine 0.02g 91.2 Alkylamine polyoxyethylene ether quaternary ammonium salt 0.02g 90.7 Alkoxy modified polytrisiloxane 0.02g 94.5

[0097] As can be seen from Table 3, among the four synergists, cocamidopropyl betaine, alkylamine polyoxyethylene ether quaternary ammonium salt, and alkoxy modified polytrisiloxane can all increase the protective effect from 78.9% to more than 90%. Therefore, these three synergists were selected for mixing.

[0098] Table 4 Effects of mixing three synergists on drug efficacy

[0099]

[0100] As can be seen from Table 4, by compounding the three synergists in different proportions and reducing the added amount by half, the control efficacy of No. 3, No. 5, No. 8, and No. 10 was most significantly improved, from 78.9% (without adding synergists) to more than 90%.

[0101] No. 8 and No. 10 increased the proportion of alkoxy modified polytrisiloxane, but the actual protection effect was not significantly improved. At the same time, because the price of this raw material is relatively high, the inventors chose No. 3 and No. 5 as the optimal ratio.

[0102] Application Example 3: Field efficacy test of a glyphosate-bromoxynil-octanoyl-fluthrin-methyl composite composition for controlling glyphosate-resistant transgenic corn weeds

[0103] Control Agents: Formulation Examples 1-18

[0104] Control agent: 30% glyphosate aqueous solution (commercially available)

[0105] 25% bromoxynil octanoate emulsifiable concentrate (commercially available)

[0106] 5% fluthiacet-methyl emulsifiable concentrate (commercially available)

[0107] Clear water control

[0108] Usage: For example, the dosage of the preparation is 45g of active ingredient per mu; the dosage of 30% glyphosate aqueous solution is 90g of active ingredient per mu; the dosage of 25% bromoxynil octanoate emulsifiable concentrate is 20g of active ingredient per mu; the dosage of 5% methotrexate methyl emulsifiable concentrate is 1g of active ingredient per mu.

[0109] Application time: spray the stems and leaves once when the weeds in the field are in the 2-4 leaf stage;

[0110] Investigation method: Investigate the control effect on crabgrass and Amaranthus retroflexus 15 days and 30 days after application;

[0111] Calculation method:

[0112] Preventive effect (%) = (fresh weight of the control group with clear water - fresh weight of the treated group) / fresh weight of the control group with clear water × 100

[0113] 5. Efficacy test of compound composition for controlling weeds in corn fields

[0114]

[0115] As shown in Table 5, the dosage of the formulation examples is half that of a single glyphosate dose. For crabgrass control, formulation examples 2, 4, 6, 8, 10, 12, 14, 16, and 18, which do not include the synergistic composition, are comparable to glyphosate alone. For Amaranthus retroflexus control, formulation examples without the synergistic composition also outperform the single glyphosate dose. Furthermore, formulation examples 1, 3, 5, 7, 9, 11, 13, 15, and 17, which include the synergistic composition, demonstrate significant improvements in control efficacy, achieving over 90% control of both crabgrass and Amaranthus retroflexus. In addition, the inventors found in the experiments that the compound composition also has good control effects on barnyard grass, foxtail grass, alopecurus, goosegrass, quinoa, cleaver, cyperus rotundus, wild oats, chickweed, velvet, shepherd's purse, poppy, polygonum, Solanum nigrum, Xanthium sibiricum, field bindweed, Alternanthera philoxeroides, duckweed, horsetail, and prickly lettuce.

[0116] The above examples are only for illustrating the technical concept and technical features of the present invention and are not intended to limit the scope of protection of the present invention. Any equivalent transformation or modification made based on the essence of the present invention should be included in the scope of protection of the present invention.

Claims

1. A compound herbicidal composition containing glyphosate, characterized in that: The active ingredients are compounded from component A, component B and component C. By weight, the total weight of the active ingredients accounts for 34.1% to 85% of the total weight of the compound herbicidal composition, and the remainder is adjuvants. The component A is glyphosate, the component B is bromoxynil octanoyl, and the component C is fluthiacet-methyl; The weight ratio of component A, component B and component C is (30-65): (4-15): (0.1-5).

2. The compound herbicidal composition containing glyphosate according to claim 1, characterized in that: The auxiliary agent is one or more of a dispersant, an emulsifier, a wetting agent, a thickener, a disintegrant, a binder, a synergist, an oil phase medium or a carrier.

3. The compound herbicidal composition containing glyphosate according to claim 1, characterized in that: The compound herbicidal composition is in the form of wettable powder, water-dispersible granules or oil suspension.

4. The compound herbicidal composition containing glyphosate according to claim 3, characterized in that: The compound herbicidal composition, when in the form of a wettable powder, comprises the following raw materials in percentage by weight: 30% to 55% of glyphosate, 5% to 12% of bromoxynil octanoyl, 0.2% to 2% of methicillin-methyl, 4% to 15% of a dispersant, 1% to 5% of a wetting agent, 0% to 10% of a synergist, and the carrier is supplemented to 100%.

5. The compound herbicidal composition containing glyphosate according to claim 3, characterized in that: The compound herbicidal composition is in the form of water-dispersible granules and comprises the following raw materials in percentage by weight: 30% to 55% of glyphosate, 5% to 12% of bromoxynil octanoyl, 0.2% to 2% of fluthiacet-methyl, 3% to 9% of dispersant, 1% to 5% of wetting agent, 0.5% to 5% of disintegrant, 0.5% to 1% of binder, 0% to 10% of synergist, and the carrier is supplemented to 100%.

6. The compound herbicidal composition containing glyphosate according to claim 3, characterized in that: The compound herbicidal composition, when in the form of an oil suspension, comprises the following raw materials in percentage by weight: 30% to 35% of glyphosate, 5% to 10% of bromoxynil octanoyl, 0.5% to 1.5% of methicillin-methyl, 3.5% to 10% of emulsifier, 1% to 8% of dispersant, 0.5% to 2% of thickener, 0% to 10% of synergist, and the oil phase medium is supplemented to 100%.

7. The compound herbicidal composition containing glyphosate according to any one of claims 4 to 6, characterized in that: The synergist is selected from: any one of alkyl glucoside, cocamidopropyl betaine, alkylamine polyoxyethylene ether quaternary ammonium salt, and alkoxy modified polytrisiloxane, or a mixture of two or more of the above in any proportion.

8. Use of the glyphosate-containing compound herbicidal composition according to any one of claims 4 to 6 for controlling annual or perennial grasses and broadleaf weeds on glyphosate-tolerant transgenic corn.

9. The use according to claim 8, characterized in that The annual or perennial grass and broad-leaved weeds include barnyard grass, foxtail grass, foxtail herb, goosegrass, crabgrass, quinoa, cleaver, cyperus rotundus, wild oats, chickweed, velvet, shepherd's purse, poppy, polygonum, nightshade, cocklebur, field bindweed, alternator, duckweed, horsetail, amaranth or prickly lettuce.

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