CN114521561A - Weeding composition containing fluopicolide - Google Patents

Abstract

The invention belongs to the technical field of compound pesticides, and discloses a herbicidal composition containing fenoxafen. In the herbicidal composition, the mass ratio of diflufenazone to terbutin/atrazine is (1-3.5): (30-64), and the mass percentage content of the two in the herbicidal composition is 1-80 %. The herbicidal composition of the present invention can be used to prepare a herbicide for controlling weeds in corn fields, and the formulation can be made into various formulations allowed by pesticides, such as suspending agent, dispersible oil suspending agent and the like. In the herbicidal composition, the compounding of two active ingredients has obvious synergistic effect, can reduce the dosage of chemicals, reduce the cost, improve the control effect, expand the herbicidal spectrum, delay the generation of weed resistance, and protect the environment.

Description

A kind of herbicidal composition containing fenoxafen

technical field

The invention relates to a herbicidal composition. The active ingredients include a first active ingredient diflufenazone and a second active ingredient terbutin/atrazine, which belongs to the technical field of compound pesticides.

Background technique

Bicyclopyrone, English name: bicyclopyrone, belongs to the triketone class of herbicides, which is absorbed by plant roots and leaves and conducted in the body, inhibiting p-hydroxyphenylpyruvate dioxidase (HPPD), resulting in the accumulation of tyrosine , the biosynthesis of plastoquinone and tocopherol is stopped, which in turn leads to a decrease in the content of chlorophyll, causing the plant meristem to become chlorotic and cause albino death. Fluoxazone has a wide herbicidal spectrum and can effectively control various annual weeds, including amphorae, barnyardgrass, Argentinian fly, amaranth, saxifrage, and fenugreek, etc., and is widely used in crops, suitable for corn fields, sugarcane , wheat and other crop fields, can be pre-emergence soil treatment or post-emergence stem and leaf treatment.

Terbuthylazine, English name: terbuthylazine, belongs to triazine herbicides, which has selective systemic effect. The agent can be absorbed from the roots, or infiltrated into plants from the stems and leaves, and transported to the leaves to inhibit the electron transfer in photosynthesis. Therefore, it can control most weeds, and generally has a better effect on newly germinated weeds, and can control annual broad-leaved weeds and grass weeds.

Atrazine, English name: atrazine, belongs to triazepine herbicides, its mechanism of action and application technology are basically similar to terbutin, with selective systemic effect, suitable for corn, sorghum, woodland, grassland, sugarcane and other annual control and perennial broadleaf and grass weeds.

Herbicides are currently the most beneficial tools for weed control in farmland, but with the extensive and long-term use of herbicides, problems such as weed resistance, changes in weed populations, and limited herbicidal spectrum arise. The applicant has found through long-term experiments that the mixed use of diflufenazone with different mechanisms of action and terbutin or atrazine has obvious synergistic effects on annual grass weeds and broad-leaved weeds in corn fields, reducing the dosage of the drug. , expanding the herbicidal spectrum, and the rational mixing of herbicides can effectively delay the emergence of weed resistance.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a synergistic herbicidal composition, to solve the problem of weed resistance, to expand the herbicidal spectrum, to reduce the amount of chemicals used, and to reduce the cost.

In view of the technical problem to be solved, the present invention provides a compound pesticide composition, comprising two active ingredients, respectively:

The first active ingredient, flufenox;

the second active ingredient terbutin or atrazine;

The mass ratio of the first active ingredient to the second active ingredient is (1-3.5): (30-64);

In terms of mass percentage, the content of active active ingredients accounts for 1%-80% of the total mass;

The binary herbicidal composition containing terbutin of the present invention can be formulated into a variety of agriculturally acceptable dosage forms according to methods known to those skilled in the art. Include various adjunct ingredients that are permitted and acceptable in different pesticide formulations.

The auxiliary ingredients include but are not limited to emulsifiers, dispersants, wetting agents, solvents, antifreeze agents, defoaming agents, thickeners, disintegrants, synergists, preservatives and fillers, etc., all of which are pesticide formulations. The ingredients commonly used or allowed to be used are not particularly limited, and the specific ingredients and dosages are determined through experiments according to the requirements of the formula.

The emulsifier can be various emulsifiers known in the field of pesticide formulations, and the emulsifier can be phenethylphenol polyoxyethylene polyoxypropylene ether, alkyl aryl polyoxyethylene polyoxypropylene ether, fatty acid polyoxyethylene Vinyl ether, fatty alcohol polyoxyethylene ether, glycerol laurate polyoxyethylene ether, styrylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, alkylphenol polyoxypropylene polyoxyethylene ether, styryl benzene base polyoxyethylene ether, alkylphenol polyoxyethylene ether, sorbitan fatty acid ester polyoxyethylene ether, fatty alcohol polyoxyethylene ether sulfonate, alkylphenol polyoxyethylene formaldehyde condensate, dodecane One or more of calcium base sulfonate, alkylphenol polyoxyethylene ether succinic acid monoester sulfonate, alkylphenol polyoxyethylene phosphate, and alkylphenol polyoxyethylene ether sulfosuccinate.

The dispersing agent can be various dispersing agents known in the field of pesticide formulations, and the dispersing agent can be alkylphenol polyoxyethylene ether phosphate, alkylphenol polyoxyethylene ether sulfate, phenethylphenol polyoxyethylene Vinyl ether phosphate, polyoxyethylene polyoxypropylene ether block copolymer, sodium lignosulfonate, sodium methylene dinaphthalene sulfonate (dispersant NNO), calcium lignosulfonate, polycarboxylate, Sodium methylene bis-naphthalene sulfonate, sodium methylene bis-methyl naphthalene sulfonate, polyvinylpyrrolidone, alkylamido taurine, alkyl naphthalene sulfonic acid polycondensate sodium salt, sodium methylene bis-naphthalene sulfonate One or more of formaldehyde condensates.

The wetting agent can be various wetting agents known in the field of pesticide formulations, and the wetting agent can be sodium alkyl naphthalene sulfonate, sodium lauryl sulfate, sodium secondary alkyl sulfate, dodecyl benzene Sodium sulfonate, fatty alcohol polyglycol ether sulfate, fatty alcohol polyoxyethylene ether, nonylphenol polyoxyethylene ether, sorbitan fatty acid ester polyoxyethylene ether, alkyl naphthalene formaldehyde condensate, alkyl One or more of naphthalene sulfonate and other wetting agents.

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

The antifreeze agent can be various antifreeze agents known in the field of pesticide formulations, and the antifreeze agent can be one or more of ethylene glycol, propylene glycol glycerol, diethylene glycol, urea, and inorganic salts.

The defoaming agent can be various defoaming agents known in the field of pesticide formulations, and the defoaming agent can be one or more of silicone compounds, epoxidized soybean oil, emulsified silicone oil, and fatty alcohols.

The thickener can be various thickeners known in the field of pesticide formulations, and the thickener can be one or more of xanthan gum, polyvinyl alcohol, sodium alginate, gum arabic, and magnesium aluminum silicate. kind.

The disintegrating agent can be various disintegrating agents known in the field of pesticide formulations, and the disintegrating agent can be ammonium sulfate, sodium carboxymethyl starch, urea, low-substituted hydroxypropyl cellulose, cross-linked carboxymethyl cellulose One or more of sodium alginate, crospovidone, sodium alginate, sodium bicarbonate, and sodium chloride.

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

The preservatives can be various preservatives known in the field of pesticide formulations, and the preservatives can be one or more of cassone, sodium benzoate, benzoic acid, potassium sorbate, and formaldehyde.

The deionized water is industrialized deionized water.

The dosage forms used in the formulation examples of the present invention mainly include suspending agents and dispersible oil suspending agents.

The technical effect achieved by the present invention:

The herbicidal composition containing diflufenazone provided by the invention has obvious synergistic effect on various grass weeds and broad-leaved weeds, can effectively reduce the amount of pesticides used, improve the control effect, expand the herbicidal spectrum, and delay the weeds resistance, and can reduce costs and protect the environment.

Detailed ways

The combined effects of fluoxafen and terbutin or atrazine on various grass weeds and broadleaf weeds are described below by indoor toxicity assay.

The test objects were foxtail and quinoa.

Test method: Refer to "People's Republic of China Agricultural Industry Standard NY/T1155.4-2006 Pesticide Indoor Bioassay Test Guidelines for Herbicides Part 4: Activity Determination Test Stem and Leaf Spray Method". To formulate the original drug into the required test drug, first set 5 different concentration gradients for the single dose and each compound drug (on the basis of the preliminary test results, the concentration gradient settings are also different according to the different drug ratios, and the prevention rate is different. Set according to the proportional series within the range of 5% to 90%). Weeds were in the 2-3 leaf stage, and were sprayed from low dose to high dose respectively, and each treatment was repeated 4 times, and a clear water control was set. After treatment, they were placed in a greenhouse for observation, and water was supplemented by infiltration irrigation at the bottom of the pot. After 21 days of treatment, the fresh weight control effect of each chemical treatment was calculated.

The Gowing method was used to evaluate the combined effect of the two active ingredients. First, the control effect of the single agent and the mixture on the target weeds was measured, and then the theoretical control effect of the mixture was calculated through the measured control effect of the single agent. The type of combined action was evaluated by comparing the measured control effects of the mixtures.

Calculation formula: E ₀ =X+Y-XY/100

Wherein: X is the fresh weight control effect of A when the dosage is P;

Y is the fresh weight control effect of B when the dosage is Q;

E ₀ is the theoretical fresh weight control effect of A+B when the dosage is P+Q;

E is the measured fresh weight control effect of each treatment

When the EE ₀ is greater than 10%, it means that the compounding produces synergistic effect; when the EE ₀ is less than -10%, it means that the compounding produces an antagonistic effect; when the EE ₀ value is between -10% and 10%, it means that the compounding produces an antagonistic effect. Matching produces additive effect.

Table 1 Determination of the indoor toxicity of foxtail foxtail for the mixture of flufenox and terbutin

Table 2 Determination of indoor toxicity of fluoxafen and terbutinol mixed to C.

Table 3 Determination of indoor toxicity of foxtail foxtail by the mixture of flufenox and atrazine

Table 4 Determination of indoor virulence of the mixture of fluoxapyr and atrazine to C.

As can be seen from the above Table 1, Table 2, Table 3 and Table 4, the combination of fluoxazone and terbutin or atrazine has shown a certain synergistic effect on the grass weed foxtail and broadleaf weed quinoa. effect.

In order to better illustrate the present invention, the content of the present invention is further described below in conjunction with the formulation examples, and the percentages in the formula are all weight percentages.

Formulation Example 1

Weigh 1% diflufenazone, 14% terbutin, 0.25% detox, 3% sodium lignosulfonate, 5% Nongru 1601#, 3% Span-60#, 1% sodium alkyl sulfonate , 1% polyvinyl alcohol, 5% propylene glycol, and methyl oleate were added to 100% by weight. The above-mentioned raw materials are mixed, dispersed by high-speed shearing for 30 minutes, and then sanded with a sand mill to obtain a 15% dispersible oil suspension agent of flufenox-terbutin.

Formulation Example 2

Weigh 1% diflufenazone, 16% terbutin, 0.25% quinoxazone, 3.5% sodium lignosulfonate, 5% agricultural milk 1601#, 4% span-60#, 1% sodium alkyl sulfonate , 1.5% polyvinyl alcohol, 5% propylene glycol, and methyl oleate were added to 100% by weight. The above-mentioned raw materials are mixed, dispersed by high-speed shearing for 30 minutes, and then sanded with a sand mill to obtain a 17% dispersible oil suspension of flufenox-terbutin.

Formulation Example 3

Weigh 1% diflufenazone, 18% terbutin, 0.25% detox, 3.5% sodium lignosulfonate, 6% Nongru 1601#, 4% Sipan-60#, 1.5% sodium alkyl sulfonate , 1.5% polyvinyl alcohol, 5% propylene glycol, and methyl oleate were added to 100% by weight. The above-mentioned raw materials are mixed, dispersed by high-speed shearing for 30 minutes, and then sanded with a sand mill to obtain a 19% dispersible oil suspending agent of fluoxafen·terbutin.

Formulation Example 4

Weigh 2% diflufenazone, 32% atrazine, 0.5% quinoxazone, 5% triphenylethylphenol polyoxypropylene polyoxyethylene block polymer, 4% sodium alkyl polyoxyethylene ether sulfonate, 3.5% magnesium aluminum silicate, 1% carboxyethyl cellulose, 5% polyethylene glycol, 1% sodium benzoate, 1% silicone oil, and deionized water were added to 100% by weight. The above-mentioned raw materials are mixed, dispersed at high speed for 30 minutes, and then sanded with a sand mill to obtain a 34% fluopyramid-atrazine suspending agent.

Biological Example: Field efficacy test for controlling weeds in corn field.

In 2021, the inventor conducted the field efficacy test of preparation example 1, preparation example 2, preparation example 3, and preparation example 4 to control weeds in cornfield, and verified the control effect of the agent on weeds in cornfield and Safety on corn.

Test method: The test field was flat, with medium fertility, each treatment was 20 m2, the plots were arranged in random blocks, and each treatment was repeated 4 times, and a blank control was set up. The spraying method adopts the conventional spraying method, and the weeds are sprayed at the 3-5 leaf stage. The test agents and dosages are shown in Table 5. 30kg of water is added per mu, and the control effect is investigated 30 days after the application. Investigate 0.25 square meters, investigate the number of weeds, and calculate the control effect.

Calculation formula: control effect = (the number of weeds in the control area - the number of weeds in the treatment area) / the number of weeds in the control area × 100

Table 5 Results of field efficacy test for weed control in cornfield

As can be seen from Table 5, the above formulation examples have a good control effect on cornfield weeds, and the control effect of each compound formulation is higher than that of a single agent, and it can be seen that the synergistic effect is obvious. The safety investigation during the test showed that all the tested agents were safe for corn growth and no phytotoxicity occurred.

To sum up, the composition of the present invention adopts a compound scheme of two active ingredients, and its activity and herbicidal effect are not simply superimposed of the activities of each component. Compared with the existing single preparation, the synergistic effect is obvious and can be reduced. The amount of pesticides used can improve the control effect, delay the generation of weed resistance, expand the weed killing spectrum, do not pollute crops, and meet the safety requirements of pesticide formulations.

Claims (7)

1. A herbicide composition containing fluopicoline is characterized in that in the composition, a first active ingredient is fluopicoline, a second active ingredient is terbuthylazine or atrazine, and the mass ratio of the first active ingredient to the second active ingredient is (1-3.5): (30-64).

2. The herbicidal composition as claimed in claim 1, wherein the mass ratio of the first active ingredient to terbuthylazine is (1-3.5): (30-54).

3. The herbicidal composition as claimed in claim 1, wherein the mass ratio of the first active ingredient to atrazine is (1-3.5): (40-64).

4. A formulation comprising the herbicidal composition as claimed in claim 1, characterized in that the active ingredient is contained in the formulation in a mass percentage of 1% to 80% by mass.

5. The preparation of claim 4, wherein the preparation is in the form of suspending agent, dispersible oil suspending agent, wettable powder, water dispersible granule.

6. The herbicidal composition of claim 1 for use in controlling weeds in corn fields.

7. Use according to claim 6, characterized in that the weeds are grasses and broadleaf weeds.