Application of halauxifen-methyl-containing weeding composition in highland barley field

Abstract

The invention belongs to the technical field of pesticide application, and particularly relates to application of a halauxifen-methyl-containing weeding composition to prevention and treatment of weeds in highland barley fields, the active ingredients of the weeding composition comprise halauxifen-methyl and chipton, and the weight ratio of the two active ingredients is (0.1-0.2): (4-15). The weeding composition can be prepared into various agriculturally allowable dosage forms, can effectively prevent and treat various broadleaf weeds in the highland barley field, has a certain synergistic effect on the broadleaf weeds in the highland barley field, can effectively reduce the dosage of a medicament, reduces the cost, protects the environment, and is very safe to highland barley.

Description

Technical Field

[0001] The invention relates to an application of a herbicidal composition. The herbicidal composition comprises a first active ingredient, haloxyfop-methyl, and a second active ingredient, dimethyltetrachloride or a dimethyltetrachloride derivative, and belongs to the technical field of pesticide application. Background Art

[0002] Highland barley has the advantages of strong adaptability, good stress resistance, short growth period and rich nutrition. It is widely distributed in Tibet, Qinghai, Aba Prefecture of Sichuan, Diqing Prefecture of Yunnan and Gannan Prefecture of Gansu. The Tibet Autonomous Region has the largest planting area and the largest industry scale. Highland barley industry has become the pillar industry of agricultural economic development in Tibet. There are many kinds of weeds in highland barley fields. Among them, the types that are more harmful to the growth and yield of highland barley include wild oats, brome grass, white grass, crabgrass and other grass weeds, as well as wild rape, sophora japonica, quinoa, wild buckwheat, Polygonum multiflorum, field bindweed, and star anise.

[0003] Halauxifen-methyl, commonly known as halauxifen-methyl, is the first synthetic auxin herbicide with an aryl picolinate structure developed by Dow AgroSciences. It simulates the effects of high-dose natural plant growth hormones, causing overstimulation of specific auxin regulatory genes and interfering with multiple growth processes of sensitive plants. It can be absorbed by the stems, leaves and roots of plants, and by binding to hormone receptors in the plant body, it stimulates excessive division of plant cells, blocks conductive tissues, and finally causes plant nutrient exhaustion and death.

[0004] MCPA is a phenoxycarboxylic acid selective herbicide that can destroy the carbohydrate and protein structure of the plant, hinder the formation of chlorophyll, prevent cells from dividing, affect the normal metabolism of the plant, and eventually lead to plant death. It is mainly processed into salt preparations for use, has strong systemic conductivity, and is mainly used for post-emergence stem and leaf treatment. It is safe for gramineous crops and sensitive to broad-leaved crops. It can effectively prevent broad-leaved weeds and sedge weeds.

[0005] At present, the Tibet Autonomous Region has promoted a relatively single variety of herbicides for highland barley fields, which has led to an increasing resistance of weeds. Increasing the dosage will cause damage to crops and harm the environment, and ultimately the cost of prevention and control will become increasingly high. If the herbicides are mixed scientifically and rationally, the effect can be significantly increased, and the prevention and control of weeds in highland barley fields can be improved. Summary of the invention

[0006] The purpose of the present invention is to provide a herbicidal composition containing fluazifop-butyl for use in highland barley fields. The composition can expand the weed control spectrum, reduce the amount of the agent used, improve the control effect on broad-leaved weeds in highland barley fields, and is safe to highland barley within a certain range of agent use.

[0007] In view of the technical problem to be solved, the present invention provides a compound pesticide composition, comprising two active ingredients, the first active ingredient is halochloridone, and the second active ingredient is dimethyltetrachloridone or a dimethyltetrachloridone derivative.

[0008] The mass ratio of the first active ingredient to the second active ingredient is: (0.1-0.2):(4-15), i.e. 1:20 to 1:150.

[0009] Calculated by mass percentage, the content of effective active ingredients accounts for 1%-90% of the total mass.

[0010] Furthermore, the herbicidal composition contains a third active ingredient, which is one of florasulam, bensulfuron-methyl, benzylsulfuron-methyl, and clofopyralid (isooctyl ester).

[0011] The application of the herbicidal composition containing haloxyfop-butyl in highland barley fields can be prepared into a variety of dosage forms permitted in agriculture according to methods known to those skilled in the art, and relatively good dosage forms include emulsifiable concentrates, dispersible oil suspensions, water-dispersible granules, suspensions and suspoemulsions.

[0012] The various application formulations prepared from the pesticide composition of the present invention include, in addition to the effective active ingredients, various auxiliary ingredients that are permitted and acceptable in different pesticide formulations.

[0013] The auxiliary ingredients include, but are not limited to, emulsifiers, dispersants, wetting agents, solvents, antifreeze agents, defoamers, thickeners, disintegrants, synergists, preservatives and fillers, etc., which are all commonly used or permitted ingredients in pesticide formulations and are not particularly limited. The specific ingredients and amounts are determined through experiments based on the formulation requirements.

[0014] The emulsifier may be any emulsifier known in the field of pesticide formulations, and may be one or more of phenylethylphenol polyoxyethylene polyoxypropylene ether, alkylaryl polyoxyethylene polyoxypropylene ether, fatty acid polyoxyethylene ether, fatty alcohol polyoxyethylene ether, glycerol laurate polyoxyethylene ether, styrylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, alkylphenol polyoxypropylene polyoxyethylene ether, styrylphenyl polyoxyethylene ether, alkylphenol polyoxyethylene ether, sorbitan fatty acid ester polyoxyethylene ether, fatty alcohol polyoxyethylene ether sulfonate, alkylphenol polyoxyethylene formaldehyde condensate, calcium dodecyl sulfonate, alkylphenol polyoxyethylene ether succinic acid monoester sulfonate, alkylphenol polyoxyethylene phosphate, and alkylphenol polyoxyethylene ether sulfonated succinate.

[0015] The dispersant may be any of various dispersants known in the field of pesticide formulations, and may be one or more of alkylphenol polyoxyethylene ether phosphate, alkylphenol polyoxyethylene ether sulfate, phenethylphenol polyoxyethylene ether phosphate, polyoxyethylene polyoxypropylene ether block copolymer, sodium lignin sulfonate, sodium methylene dinaphthalene sulfonate (dispersant NNO), calcium lignin sulfonate, polycarboxylate, sodium methylene bisnaphthalene sulfonate, sodium methylene bismethylnaphthalene sulfonate, polyvinyl pyrrolidone, alkylamido taurate, sodium salt of alkylnaphthalene sulfonic acid polycondensate, and sodium methylene bisnaphthalene sulfonate formaldehyde condensate.

[0016] The wetting agent can be various wetting agents known in the field of pesticide formulations, and can be one or more of sodium alkylnaphthalene sulfonate, sodium dodecyl sulfate, sodium secondary alkyl sulfate, sodium dodecylbenzene sulfonate, fatty alcohol polyglycol ether sulfate, fatty alcohol polyoxyethylene ether, nonylphenol polyoxyethylene ether, sorbitan fatty acid ester polyoxyethylene ether, alkylnaphthalene formaldehyde condensate, alkylnaphthalene sulfonate and other wetting agents.

[0017] The solvent may be any solvent known in the field of pesticide formulations, and may be one or more of water, methanol, ethanol, N-methylpyrrolidone, N,N-dimethylformamide, N,N-dimethylacetamide, tetrahydrofurfuryl alcohol, toluene, xylene, dimethyl sulfoxide, tetrahydrofuran, cyclohexanone, n-butanol, isopropanol, solvent oil No. 100, No. 150, No. 180, and No. 200.

[0018] The antifreeze agent may be any antifreeze agent known in the field of pesticide formulations, and the antifreeze agent may be one or more of ethylene glycol, propylene glycol, glycerol, diethylene glycol, urea, and inorganic salts.

[0019] The defoamer may be any defoamer known in the field of pesticide formulations, and may be one or more of silicone compounds, epoxy soybean oil, emulsified silicone oil, and fatty alcohol.

[0020] The thickener may be any thickener known in the field of pesticide formulations, and may be one or more of xanthan gum, polyvinyl alcohol, sodium alginate, gum arabic, and magnesium aluminum silicate.

[0021] The disintegrant may be any disintegrant known in the field of pesticide formulations, and may be one or more of ammonium sulfate, sodium carboxymethyl starch, urea, low-substituted hydroxypropyl cellulose, cross-linked sodium carboxymethyl cellulose, cross-linked polyvinylpyrrolidone, sodium alginate, sodium bicarbonate, and sodium chloride.

[0022] The carrier can be various carriers known in the field of pesticide formulation, and can be one or more of glucose, white carbon black, kaolin, diatomaceous earth, light calcium carbonate, heavy calcium carbonate, attapulgite, soluble starch, urea, maltose, sucrose, citric acid, potassium carbonate, sodium carbonate, and anhydrous sodium sulfate.

[0023] The preservative may be any preservative known in the field of pesticide formulations, and the preservative may be one or more of kasone, sodium benzoate, benzoic acid, potassium sorbate, and formaldehyde.

[0024] The deionized water is industrial deionized water.

[0025] The technical effects achieved by the present invention are:

[0026] Compared with the prior art, the present invention provides an application of a herbicidal composition containing fluclopyralid and dimethoate in highland barley fields. The inventor of the present application has found through specific experiments that the composition is applied to highland barley fields, can effectively prevent and control broad-leaved weeds in highland barley fields, has obvious synergy within a certain dosage range, and is safe for highland barley. In specific production practice, the composition can be prepared into a variety of dosage forms permitted in agriculture, can effectively prevent and control broad-leaved weeds in highland barley fields, solve the problem of weeds in highland barley fields in Tibet, and the two active ingredients have different mechanisms of action, which can effectively delay the generation of weed resistance. DETAILED DESCRIPTION

[0027] The following specific examples are used to illustrate the combined effect of haloxifen-methyl and dimethoate on broadleaf weeds. It should be understood that the following examples are only exemplary descriptions and explanations of the present invention, and should not be construed as limiting the scope of protection of the invention.

[0028] Test method: The test method adopts the stem and leaf spray method, and the original drug is prepared into the required test agent. First, the single agent and each compound agent are set to 5 different concentration gradients (based on the results of the preliminary test, according to the different agent ratios, the concentration gradient settings are also different, and the control rate is set in geometric progression within the range of 5% to 90%), and then when the weeds are in the 2-4 leaf stage, the stem and leaf spray treatment is carried out from low dose to high dose, and each treatment is repeated 4 times, and a clear water control is set. After treatment, it is placed in the greenhouse for routine cultivation and observation, and water is supplemented by infiltration irrigation at the bottom of the pot. An investigation is conducted 21 days after the treatment, and the fresh weight control effect of each agent treatment is calculated.

[0029] The Gowing method was used to evaluate the combined effect of two active ingredients after compounding. First, the control efficacy of single agents and mixtures on target weeds was determined, and then the theoretical control efficacy of the mixture was calculated based on the measured control efficacy of the single agent. The theoretical control efficacy of the mixture was compared with the measured control efficacy of the mixture to evaluate the type of combined action.

[0030] Calculation formula: E0 = X + Y - XY / 100

[0031] Where: X is the fresh weight control effect of A when the dosage is P;

[0032] Y is the fresh weight protective effect of B when the dosage is Q;

[0033] E0 is the theoretical fresh weight control effect of A+B when the dosage is P+Q;

[0034] E is the measured fresh weight protection effect of each treatment

[0035] When E-E0 is greater than 10%, it indicates that the mixture produces a synergistic effect; when E-E0 is less than -10%, it indicates that the mixture produces an antagonistic effect; when the E-E0 value is between -10% and 10%, it indicates that the mixture produces an additive effect.

[0036] Table 1 Indoor toxicity test of halauxifen-methyl and dimethoate against Brassica napus

[0037]

[0038]

[0039] As can be seen from Table 1, the combination of halopyralid and dimethoate showed a certain synergistic effect on the broad-leaved weed rape.

[0040] Table 2 Indoor toxicity test of halauxifen-methyl and dimethoate against Chenopodium album

[0041]

[0042] As can be seen from Table 2, the combination of halopyralid and dimethoate showed a certain synergistic or additive effect on the broad-leaved weed Chenopodium album.

[0043] In order to better illustrate the present invention, the present invention is further described below in conjunction with the embodiments, and the percentages in the formula are all weight percentages.

[0044] Preparation Example 1

[0045] Haloclopitol 0.5%, dimethyl tetrachloride 42.5%, cyclohexanone 5%, ethanol 10%, alkylphenol formaldehyde resin polyoxyethylene ether 6%, calcium dodecylbenzene sulfonate 3%, polyoxyethylene polyoxypropylene ether block copolymer 2%, 150 solvent oil to 100%. The above raw materials are mixed, stirred and dissolved completely to obtain 43% Haloclopitol·dimethyl tetrachloride emulsifiable concentrate.

[0046] Preparation Example 2

[0047] Haloclopitol 0.5%, dimethyl tetrachloride 42.5%, sodium lignin sulfonate 2%, Nongru 1601# 4%, Span-60# 3%, sodium alkyl sulfonate 2%, polyvinyl alcohol 0.5%, propylene glycol 2.5%, methyl oleate added to 100% by weight. The above raw materials are mixed, dispersed at high speed shear for 30 minutes, and sand-milled with a sand mill to obtain a 43% Haloclopitol·dimethyl tetrachloride dispersible oil suspension.

[0048] Preparation Example 3

[0049] 0.5% of haloxyfop-butyl, 42.5% of dimethoate, 1% of bispyribac, 5% of polycarboxylate GY-D06, 4% of sodium polycarboxylate, 3.5% of sodium naphthalenesulfonate, 3% of sodium lauryl sulfate, 5.5% of sodium sulfate, 3% of ammonium sulfate, and 100% by weight of kaolin. The above raw materials are mixed, ultrafine airflow pulverized, mixed, and granulated to obtain 44% haloxyfop-butyl·dimethoate·bispyribac water dispersible granules.

[0050] Biological Example: Field efficacy test for controlling broad-leaved weeds in highland barley fields.

[0051] In 2024, the inventor conducted field efficacy tests on Formulation Example 1, Formulation Example 2, Formulation Example 3 and a control agent for controlling broad-leaved weeds in highland barley fields in Tibet, and verified the control effect of the agent on broad-leaved weeds in highland barley fields and its safety on highland barley.

[0052] The test subjects are broad-leaved weeds in highland barley fields. The broad-leaved weeds that are more serious in the test field are wild rapeseed, wild buckwheat, and quinoa, so these three weeds are selected as the survey objects. The test field is flat with medium fertility. The area of ​​the plot is 25㎡ (5m×5m). The plots are arranged in random blocks. The conventional spray method is used for pesticide application. The pesticide is applied when the weeds are 3 to 6 leaves. Each treatment is repeated 4 times, and a blank control is set up. 30kg of water is applied per mu, and the prevention effect is investigated 30 days after the application. Samples are taken at 5 points in each plot, and 1m 2 , investigate the number of each weed plant in the sample point and calculate the weed control effect of each pesticide treatment.

[0053] Control effect calculation formula: Control effect = (number of weeds in the control area - number of weeds in the treatment area) / number of weeds in the control area × 100

[0054] Table 3 Results of field efficacy test on controlling broadleaf weeds in highland barley fields

[0055]

[0056]

[0057] As can be seen from Table 3, the above formulation examples have good control effects on the broad-leaved weeds in highland barley fields, such as wild rape, wild buckwheat and quinoa. The control effects of the binary combination of fluclopyralid and dimethoate, and the ternary combination of fluclopyralid, dimethoate and bispyribac on the broad-leaved weeds in highland barley fields are significantly higher than those of the single-agent control agent. The binary combination has a significant synergistic effect, and the safety investigation during the test shows that all the tested agents are safe for highland barley growth and no phytotoxicity occurs.

[0058] The above is a description of the preferred embodiment of the present invention. The inventors have also found in the specific practice that the binary compound of fluazifop-butyl and dimethyl tetrachloride can be further compounded with bispyribac, bensulfuron-methyl, benzylsulfuron-methyl or clofopyralid (isooctyl ester) and applied to highland barley fields, which has a good control effect on broad-leaved weeds in highland barley fields and is safe for highland barley growth. Therefore, the present invention has a broad market prospect in Tibet and is worthy of promotion and application.

Claims

1. An application of a binary herbicidal composition containing haloxifen-butyl in controlling weeds in highland barley fields, characterized in that: The composition comprises two active ingredients, wherein the first active ingredient is halochloridone, and the second active ingredient is dimethyltetrachloridone or a dimethyltetrachloridone derivative, and the weight ratio of the first active ingredient to the second active ingredient is (0.1-0.2):(4-15).

2. The use according to claim 1, characterized in that: The dimethyl tetrachlorobenzene derivatives are dimethyl tetrachlorobenzene salts and dimethyl tetrachlorobenzene esters.

3. The use according to claim 1 or 2, characterized in that: The weight ratio of the first active ingredient to the second active ingredient in the herbicidal composition is (0.12-0.18):(8-10).

4. The use according to claim 1, characterized in that: The mass percentage of the two active ingredients in the herbicidal composition accounts for 1-90% of the total amount.

5. The use according to claim 1, characterized in that: The herbicidal composition further comprises a third active ingredient, which is one of florasulam, bensulfuron-methyl, benzylsulfuron-methyl and clofopyralid (isooctyl ester).

6. The use according to claim 1 or 2, characterized in that: The herbicidal composition further comprises conventional adjuvants, which include carriers and / or surfactants.

7. The use according to claim 6, characterized in that: The formulation of the herbicidal composition is emulsifiable concentrate, dispersible oil suspension, water dispersible granule, suspension concentrate and suspoemulsion.

8. The use according to claim 1, wherein the highland barley field weeds are broadleaf weeds.

9. The use according to claim 8, characterized in that: The broad-leaved weeds are wild rape, wild buckwheat, quinoa, polygonum, star anise, horsetail, field bindweed, Polygonum multiflorum, grass sedge, lettuce, dandelion, Arisaema confusa, Elsholtzia densiflora, mallow, and Potentilla chinensis.

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