阅读说明：本技术 一种含丙炔氟草胺的三元除草组合物 (Ternary weeding composition containing flumioxazin ) 是由 郑敬敏 周大伟 刘欢 黄发伟 于 2020-12-18 设计创作，主要内容包括：本发明属于农药复配领域,具体涉及一种含丙炔氟草胺的三元除草组合物。所述三元除草组合物包括除草活性成分A、B和C,其中,活性成分A为丙炔氟草胺,B为砜吡草唑,C为氟啶草酮,三种活性成分重量比为：(1-6)：(1-15)：(2～20)。该组合物能有效防除多种棉花田禾本科和阔叶杂草,具有扩大杀草谱、减少使用量、降低成本、对作物安全、能够产生增效作用并解决抗性杂草等特点。(The invention belongs to the field of pesticide compounding, and particularly relates to a propyzamide-containing ternary weeding composition. The ternary weeding composition comprises active weeding components A, B and C, wherein the active weeding components A are flumioxazin, B is topramezone, C is fluazifop-butyl, and the weight ratio of the three active weeding components is as follows: (1-6): (1-15): (2-20). The composition can effectively prevent and kill various gramineous and broadleaf weeds in cotton fields, and has the characteristics of expanding the weed control spectrum, reducing the use amount, reducing the cost, being safe to crops, generating a synergistic effect, solving resistant weeds and the like.)

1. The ternary weeding composition containing flumioxazin is characterized by comprising weeding active ingredients A, B and C, wherein the active ingredients A are flumioxazin, B is topramezone, C is flumiclorac, and the weight ratio of A, B to C is (1-5): (1-15): (2-20).

2. The ternary herbicidal composition according to claim 1, wherein the weight ratio of active ingredients A, B to C is (1-3): (4-10): (4-8).

3. The ternary herbicidal composition according to claim 1, wherein the weight ratio of active ingredients A, B to C is 1: 4: 4.

4. a herbicidal composition according to any one of claims 1 to 3, wherein A, B and C are present in the herbicidal composition in an amount of 1 to 80% by weight of the total amount.

5. A herbicidal composition as claimed in any one of claims 1 to 3, wherein the dosage form of the herbicidal composition is selected from the group consisting of suspension concentrate, wettable powder, water dispersible granule.

6. Use of the herbicidal composition according to any one of claims 1 to 3 for controlling weeds in cotton fields.

7. The use of claim 6, wherein the cotton field weeds are: green bristlegrass herb, barnyard grass, reed, black nightshade, amaranth and chenopodium album.

Technical Field

The invention relates to a weeding composition, which consists of a first active ingredient flumioxazin, a second active ingredient topramezone, a third active ingredient fluazinone and an auxiliary agent, and belongs to the technical field of compound pesticides.

Background

Flumioxazin, english name: flumioxazin, a herbicide belonging to the class of N-phenyl-phthalimides, is also a typical contact herbicide, and its mechanism of action is a protoporphyrinogen oxidase inhibitor. After the soil surface is treated by flumioxazin, a treatment layer is formed on the soil surface, and when weeds germinate, seedlings are died by contacting with the agent treatment layer; when the stems and leaves are treated, the protoporphyrin can be absorbed by plant buds and leaves and is conducted in vivo, protoporphyrin accumulation is rapidly caused on sensitive weed leaf surfaces, the peroxidation of cell membrane is enhanced, and the irreversible damage to the cell membrane structure and function of sensitive weeds is caused.

Xaflupyrad, english name: pyroxasulfofone, which is a herbicide belonging to the class of ultralong-chain fatty acid elongase inhibitors and is useful as a pre-emergence soil treatment agent for most crop fields, exerts its efficacy by inhibiting ultralong-chain fatty acid elongase. The pyriftalid can effectively prevent and control main gramineous weeds and broadleaf weeds in dry-land crop fields, and has the excellent characteristics of wide herbicidal spectrum, high activity, low dosage, good safety and the like.

Fluazifop-butyl, english name: fluridone belongs to a pyrrolidone herbicide, can be used for wheat, rice, corn, cotton and the like, can be used for preventing and removing annual gramineous weeds, broadleaf weeds and certain perennial weeds, and is also suitable for certain weeds which have resistance to glyphosate.

Cotton is an important economic crop in China, the planting history is long, but the harm of weeds is an important problem which troubles the high-efficiency production of cotton in China, chemical weeding is an important weeding mode for weeding in cotton fields, and reasonable chemical pesticide compounding can delay the resistance of weeds, reduce the dosage, reduce the cost and is safe to the environment.

Disclosure of Invention

The invention aims to provide a synergistic weeding composition, which can expand the weed control spectrum when a single agent is used, reduce the use amount and improve the control effect on weeds in a cotton field.

Aiming at solving the technical problem, the invention provides a compound pesticide composition, which comprises three active ingredients:

A) a first active ingredient flumioxazin;

B) a second active ingredient of the compound is the topramezone;

C) a third active ingredient, fluridone;

the mass ratio of the first active ingredient to the second active ingredient to the third active ingredient is (1-5): (1-15): (2-20).

The content of the effective active ingredients accounts for 1 to 80 percent of the total mass according to the mass percentage

The ternary herbicidal composition containing flumioxazin can be prepared into various agriculturally acceptable formulations according to the method known by the technical personnel in the technical field, and in various application formulations, the ternary herbicidal composition contains effective active ingredients and various acceptable auxiliary ingredients which are allowed to be used in different pesticide formulations.

The auxiliary components include, but are not limited to, emulsifiers, dispersants, wetting agents, solvents, antifreezing agents, antifoaming agents, thickeners, disintegrants, synergists, preservatives, fillers and the like, which are commonly used or allowed to be used in pesticide preparations, and are not particularly limited, and specific components and dosage are determined by experiments according to formulation requirements.

The emulsifier can be various emulsifiers known in the field of pesticide formulation, and can be one or more of phenethyl phenol polyoxyethylene polyoxypropylene ether, alkylaryl polyoxyethylene polyoxypropylene ether, fatty acid polyoxyethylene ether, fatty alcohol polyoxyethylene ether, glyceryl laurate polyoxyethylene ether, styryl phenol polyoxyethylene ether, castor oil polyoxyethylene ether, alkylphenol polyoxypropylene polyoxyethylene ether, styryl phenyl 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.

The dispersant may be any of various dispersants known in the field of pesticide preparations, 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 lignosulfonate, sodium methylenedinaphthalene sulfonate, calcium lignosulfonate, polycarboxylate, sodium methylenedinaphthalene sulfonate, polyvinylpyrrolidone, alkylamido taurate, sodium alkylnaphthalenesulfonate polycondensate, and sodium methylenedinaphthalene sulfonate formaldehyde condensate.

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

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

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

The thickening agent can be various thickening agents known in the field of pesticide preparation, and the thickening agent can be one or more of xanthan gum, polyvinyl alcohol, sodium alginate, gum arabic and magnesium aluminum silicate.

The disintegrant can be various disintegrants known in the field of pesticide preparations, and can be one or more of ammonium sulfate, sodium carboxymethyl starch, urea, low-substituted hydroxypropyl cellulose, croscarmellose sodium, crospovidone, sodium alginate, sodium bicarbonate and sodium chloride.

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

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

The deionized water is industrial deionized water.

In the specific embodiment of the invention, three formulations of suspending agent, water dispersible granule and wettable powder are applied.

The invention achieves the technical effects that:

the weeding composition provided by the invention has an obvious synergistic effect on cotton field grassy weeds and broadleaf weeds, reduces the using amount of pesticides, expands the weed control spectrum, makes up the defects and shortcomings of a single agent in use, and is safe to crops.

Detailed Description

The combined action of flumioxazin + pyraflufen-ethyl and fluridone in pairing of gramineous weeds and broadleaf weeds is illustrated by indoor toxicity measurement.

The experimental objects are barnyard grass and black nightshade.

The test method refers to part 3 of the herbicide of the agricultural industry standard pesticide indoor bioassay test criterion of the people's republic of China: activity assay test soil spray method. The original drug is prepared into the required test drug, firstly, the single drug and each compound drug are set with 5 different concentration gradients (on the basis of the preliminary test result, the concentration gradients are set differently according to different drug proportions, and the control rate is set according to the geometric progression in the range of 5-90%). Firstly, filling 4/5 soil into a pot, adopting a pot bottom infiltrating irrigation mode to completely wet the soil, uniformly scattering weed seeds on the surface of the soil, covering soil, and carrying out soil spraying treatment after 24 hours. Spraying soil and culturing conventionally. Each treatment was repeated 4 times, and a clear water control was set. Calculating the survival rate of the weeds 21 days after treatment, and evaluating the mixing effect by using a colby method.

Calculating the formula:

actual weed survival rate E (%) = fresh weight on treated group ground/fresh weight on control group ground x 100

Theoretical weed survival rate E₀（%）=A×B×C/100²

A is the actual survival rate of the target weed when the flumioxazin is used singly in a certain dosage

B is the actual survival rate of the target weeds when the pyriftalid is used singly in a certain dosage

C is the actual survival rate of the target weed when the fluazifop-butyl is used singly in a certain dosage

E₀Theoretical survival rate of target weed theory when the three are used together

Evaluation criteria: e₀E > 10% is expressed as a synergistic effect, E₀-E < -10% is expressed as antagonism; e is more than or equal to minus 10 percent₀E.ltoreq.10% is expressed as additive effect.

TABLE 1 indoor virulence determination of clomeprop in combination with flumioxazin, fenpyrazazole and fluridone

TABLE 2 indoor virulence determination of Solanum nigrum by flumioxazin, pyraflufen-ethyl and fluridone combination

As can be seen from the above tables 1 and 2, the flumioxazin, the pyroxasulfone and the fluridone are compounded according to the effective component dosage in the tables to show the synergistic effect or the additive effect on the large crabgrass and the black nightshade.

To better illustrate the invention, the following description of the invention is given in conjunction with formulation examples, the percentages in the formulation being given by weight.

Formulation example 1

Weighing 2% of flumioxazin, 8% of topramezone, 8% of fluridone, 5% of cloquintocet-mexyl, 5% of sodium alkyl sulfate, 5% of sodium alkyl naphthalene sulfonate, 1% of bentonite, 6% of propylene glycol, 0.5% of isothiazolinone, 1% of butanol and deionized water to 100% by weight. The raw materials are mixed, sheared and dispersed at high speed for 30min, and are sanded by a sand mill to prepare the 18 percent suspending agent of flumioxazin-pyraflufen-fluazinam-fluridone.

Formulation example 2

Weighing 3% of flumioxazin, 8% of topramezone, 8% of fluridone, 5% of cloquintocet-mexyl, 8% of triphenylethylphenol polyoxypropylene polyoxyethylene block polymer, 3% of alkyl polyoxyethylene ether sodium sulfonate, 3% of magnesium aluminum silicate, 0.5% of carboxyethyl cellulose, 5% of polyethylene glycol, 0.5% of sodium benzoate, 1% of silicone oil and deionized water to 100% by weight. The raw materials are mixed, sheared and dispersed at high speed for 30min, and are sanded by a sand mill to prepare the suspension agent of 19 percent of flumioxazin-sulfuropyrazole-fluazinone.

Formulation example 3

2% of flumioxazin, 8% of Sulfopyrazole, 8% of fluazinone, 3% of polycarboxylate, 7% of sodium lignosulfonate, 5% of sodium methylene bis (methylnaphthalene sulfonate), 2% of sodium dodecyl sulfate, 10% of glucose and 100% of kaolin. The materials are uniformly mixed according to a proportion, superfine airflow crushing is carried out, and then the materials are dried and sieved after rotary extrusion granulation, so as to prepare the 18 percent flumioxazin-pyraflufen-fluazinam-fluridone water dispersible granule.

Formulation example 4

3% of flumioxazin, 8% of Sulfopyrazole, 8% of fluazinone, 3% of polycarboxylate, 8% of sodium lignin sulfonate, 4% of sodium dodecyl sulfate, 5% of sodium naphthalene sulfonate and 100% of white carbon black. The raw materials are mixed, subjected to superfine airflow crushing, mixed and granulated to prepare the 19 percent flumioxazin-sultopyrazole-fluridone water dispersible granule.

Formulation example 5

2% of flumioxazin, 8% of Sulfopyrazole, 8% of fluazinone, 5% of sodium dibutyl naphthalene sulfonate, 4% of fatty alcohol polyoxyethylene ether phosphate, 4.5% of sodium dodecyl sulfate and the balance of light calcium carbonate to 100%. The raw materials are mixed, subjected to superfine airflow crushing and mixed to prepare the 18 percent wettable powder of flumioxazin-sultopyrazole-fluridone.

Formulation example 6

3% of flumioxazin, 8% of bixafen, 8% of fluazinone, 6% of sodium lignosulfonate, 6% of sodium polycarboxylate, 5% of sodium dodecyl sulfate and the balance of kaolin to 100%. The raw materials are mixed, subjected to superfine airflow crushing and mixed to prepare 19% flumioxazin-sultopyrazole-fluazinone wettable powder.

Biological example 1: and (3) field pesticide effect tests for preventing and controlling weeds in cotton fields.

The inventor conducts field pesticide effect tests of the preparation example 1, the preparation example 2, the preparation example 3, the preparation example 4, the preparation example 5 and the preparation example 6 for preventing and controlling weeds in a cotton field in Xinjiang in 2019, and verifies the prevention and control effect of the pesticide on the weeds in the cotton field and the safety of the pesticide on cotton.

The test crops are cotton, the control objects are weeds in a cotton field, the soil fertility of the test field is moderate, and the weeds in the field are mainly weeds in grass: green bristlegrass, barnyard grass, reed; broadleaf weeds mainly include: black nightshade, amaranthus retroflexus and chenopodium album. The cells are arranged in random blocks, each cell has 30 square meters, each treatment is repeated for 3 times, and blank contrast is arranged. After the soil is ploughed, the soil is leveled, then the pesticide spraying treatment is carried out, the mulching film is covered after the pesticide spraying treatment, and the sowing is carried out on the next day. The test agents and the dosages of the effective components are shown in the following table 3.

Calculating the formula: control effect = (fresh weight of weeds in control area-fresh weight of weeds in treated area)/fresh weight of weeds in control area x 100

TABLE 3 field test results of the efficacy of controlling weeds in cotton fields

As can be seen from Table 3, the preparation examples have good control effect on weeds in cotton fields, the control effect of the compound preparation of flumioxazin, pyraflufen-ethyl and flumetsulon on weeds in the cotton fields is higher than that of each control, and the synergistic effect is obvious. Safety investigation during the test period shows that all the test agents are safe to the growth of cotton and have no phytotoxicity.

In conclusion, the composition adopts a scheme of compounding three active ingredients, the activity and the weeding effect are not simple superposition of the activities of all the ingredients, and compared with the existing single preparation or binary compounding, the composition has the advantages of obvious weeding effect, obvious synergistic effect, capability of delaying resistance and expanding weed control spectrum, no pollution to crops and accordance with the safety requirement of pesticide preparations.