CN114208837A - Weeding composition and application thereof - Google Patents

Weeding composition and application thereof Download PDF

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Publication number
CN114208837A
CN114208837A CN202111609605.7A CN202111609605A CN114208837A CN 114208837 A CN114208837 A CN 114208837A CN 202111609605 A CN202111609605 A CN 202111609605A CN 114208837 A CN114208837 A CN 114208837A
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terbutryn
herbicidal composition
weeds
weeding composition
composition according
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Inventor
陈心如
张永芝
毕立国
王兆利
高复生
刘军
管秀芳
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Qingdao Hansen Biologic Science Co ltd
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Qingdao Hansen Biologic Science Co ltd
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    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/72—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms
    • A01N43/80—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with nitrogen atoms and oxygen or sulfur atoms as ring hetero atoms five-membered rings with one nitrogen atom and either one oxygen atom or one sulfur atom in positions 1,2
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
    • A01G13/00—Protecting plants
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
    • A01N43/00—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds
    • A01N43/64—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with three nitrogen atoms as the only ring hetero atoms
    • A01N43/66—1,3,5-Triazines, not hydrogenated and not substituted at the ring nitrogen atoms
    • A01N43/68—1,3,5-Triazines, not hydrogenated and not substituted at the ring nitrogen atoms with two or three nitrogen atoms directly attached to ring carbon atoms
    • A01N43/70—Diamino—1,3,5—triazines with only one oxygen, sulfur or halogen atom or only one cyano, thiocyano (—SCN), cyanato (—OCN) or azido (—N3) group directly attached to a ring carbon atom

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  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • Engineering & Computer Science (AREA)
  • Plant Pathology (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
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  • Agronomy & Crop Science (AREA)
  • Toxicology (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)

Abstract

The invention provides a weeding composition and application thereof, belongs to the technical field of pesticides, and can solve the problems that the existing herbicide is limited in weed control spectrum, weeds are easy to generate drug resistance quickly, the dosage of the herbicide is large, the cost is high, and the environment is polluted. The active ingredients of the weeding composition comprise the topramezone and the terbutryn, and the weeding composition can be applied to the control of wheat field weeds and paddy field weeds. After the topramezone and the terbutryn are compounded, the synergistic effect is realized, the weed control spectrum is expanded, the outstanding control effect on gramineous weeds and broadleaf weeds is realized, the application dosage of each effective component can be reduced, the cost is reduced, and the pollution is reduced.

Description

Weeding composition and application thereof
Technical Field
The invention belongs to the technical field of pesticides, and particularly relates to a weeding composition and application thereof.
Background
The topramezone is a novel soil treatment agent developed by Nippon combinatorial chemical company 2002, has high biological activity on preventing and killing annual gramineous weeds and broadleaf weeds, belongs to a novel pyrazole selective herbicide, has the chemical name of 3- (5- (difluoromethoxy) -1-methyl-3-trifluoromethyl pyrazole-4-methylsulfonyl) -4,5-2H-5, 5-dimethyl-1, 2-oxazole and the molecular formula of C12H14F5N3O4S has a structural formula of
Figure BDA0003434929730000011
The weeds treated by the topramezone can greatly reduce the biosynthesis of ultra-long chain fatty acids (VLCFAs) and cause the construction of fatty acid precursor substances; the xaflufen can specifically inhibit a plurality of extension steps catalyzed by VLCFAs (very high circulating fluidized bed) elongases, and is characterized by high activity, 8-10 times lower dosage than that of a classical soil treatment agent, namely a chloracetamide herbicide, longer lasting effect, stronger compatibility and lower toxicity to most of organisms.
The terbutryn is a triazine herbicide, belongs to systemic conduction type herbicides, has a chemical name of 2-methylthio-4-ethylamino-6-terbutylamino-1, 3, 5-triazine, and has a structural formula
Figure BDA0003434929730000012
Terbutryn is a selective pre-or post-emergence herbicide, takes effect in soil for 3-10 weeks, can be used for crops such as winter wheat, barley, sorghum, peanuts, soybeans, potatoes and the like, and can prevent and kill weeds such as perennial ryegrass, alopecurus, crab grass, green bristlegrass and the like.
At present, the herbicide has a limited weed control spectrum, weeds in a farm field cannot be effectively removed by using the herbicide with a single active ingredient, the weeds are easy to generate drug resistance quickly, the dosage of the herbicide is too large, the cost is high, and the environment is polluted. Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a herbicidal composition that expands the herbicidal spectrum, delays weed resistance, and reduces the dosage of active ingredients.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides a weeding composition which can be applied to the control of wheat field weeds and rice field weeds, expands the weed control spectrum, has outstanding control effect on gramineous weeds and broadleaf weeds, can reduce the application dosage of each active ingredient, reduces the cost and reduces the pollution.
In order to achieve the above object, on one hand, the invention adopts the technical scheme that: a weeding composition comprises the active ingredients of the topramezone and the terbutryn.
Preferably, the mass ratio of the sulfuryl pyraflufen to the terbutryn is 20: 1-1: 20.
preferably, the amount of the xaflufen and terbutryn is 6 to 80% by mass of the herbicidal composition.
Preferably, the weeding composition also comprises auxiliary ingredients of a pesticide preparation, and the auxiliary ingredients of the pesticide preparation comprise a carrier and an auxiliary agent.
Preferably, the carrier comprises at least one of water, a solvent and a filler.
Preferably, the adjuvant comprises a surfactant including at least one of an emulsifier, a dispersant, a wetting agent, and a penetrant.
Preferably, the auxiliary agent further comprises at least one of an antifreezing agent, a thickening agent, a stabilizer, a preservative, a disintegrating agent and an antifoaming agent.
Preferably, the formulation of the herbicidal composition is any one suitable for agricultural use.
Preferably, the formulation of the weeding composition is missible oil, aqueous emulsion, microemulsion, wettable powder, aqueous suspension, oil suspension or water dispersible granules.
In another aspect, the present invention provides the use of the above herbicidal composition for the control of weeds in wheat and rice fields.
Compared with the prior art, the weeding composition has the advantages and positive effects that:
(1) the weeding composition can achieve the effect of synergy by compounding the single sulphone pyraflufen-ethyl and the single terbutryn in a certain proportion. The principle is that as the single active ingredient has a simple action mechanism, the herbicide with the single active ingredient is continuously used, crops are easy to generate drug resistance, the speed of generating the drug resistance is high, and the compound herbicide can slow down the generation of the drug resistance, wherein the pyraflufen-ethyl is an ultra-long-chain fatty acid extension synthetase inhibitor, the terbutryn is an internal absorption conduction type herbicide, and after the action targets of the two herbicides are compounded, the herbicide can simultaneously generate the drug effect on weeds, the effect is fast, and the drug resistance is slow. The two effective components have wide application time range, expand weed control spectrum and have strong activity on grass weeds such as brome, digitaria sanguinalis, alopecurus, ryegrass and the like and broadleaf weeds such as maigre, descurainia sophia and the like;
(2) the unit area dosage of the pyriftalid can be 10 times lower than that of metolachlor and acetochlor, the pyriftalid has higher activity, high control efficacy, long duration and low resistance risk, can effectively reduce the dosage of effective components, is safe to crops, has low toxicity to animals and human beings, greatly reduces the production and use cost, reduces pesticide residue and environmental pollution, and has high safety;
(3) the weeding composition provided by the invention is composed of active ingredients with different action mechanisms, and the action sites are increased, so that the generation of drug resistance of weeds can be overcome and delayed.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a weeding composition, which comprises active ingredients of sulfuryl pyraflufen and terbutryn, wherein the mass ratio of the sulfuryl pyraflufen to the terbutryn is (20: 1-1): 20, preferably, the mass ratio of the sulpyrazazole to the terbutryn is 20: 1. 10:1, 5:1, 2:1, 1:2, 1:3, 1:4, 1:5, 1:6, 1:10, or 1: 20. When the mass ratio of the xaflufen to the terbutryn is 1: 1-3, the best synergistic effect is achieved.
In the weeding composition, the active ingredients of the topramezone and the terbutryn account for 6-80 percent, preferably 15-70 percent of the total mass percentage of the weeding composition, and the balance of the auxiliary ingredients of the pesticide preparation. The weeding composition disclosed by the invention has the advantages that the single sulpirazole and the single terbutryn are compounded according to a certain proportion, the synergistic effect can be achieved, the drug effect is greatly improved, and the application time range of the two effective components is wide.
In the above herbicidal composition of the present invention, the adjuvant for the pesticide preparation comprises a carrier and an adjuvant.
The carrier comprises at least one of water, oil, solvent and filler, wherein the water is preferably deionized water; the oil comprises one of methyl oleate, soybean oil and corn oil; the solvent comprises at least one of N, N-dimethylformamide, cyclohexanone, toluene, xylene, dimethyl sulfoxide, methanol, ethanol, trimethylcyclohexanone, N-octylpyrrolidone, ethanolamine, triethanolamine, isopropylamine, N-methylpyrrolidone, propanol, butanol, ethylene glycol, diethylene glycol, ethylene glycol methyl ether, butyl ether, ethanolamine, isopropylamine, ethyl acetate and acetonitrile; the filler comprises at least one of kaolin, diatomite, bentonite, attapulgite, white carbon black, starch and light calcium carbonate.
The auxiliary agent comprises a surfactant, the surfactant is a single agent or a compound preparation of a common nonionic surfactant or an anionic surfactant, and the surfactant comprises at least one of an emulsifier, a dispersant, a wetting agent and a penetrating agent.
Wherein the emulsifier comprises agricultural emulsion 500# (calcium alkyl benzene sulfonate), OP series phosphate (nonylphenol polyoxyethylene ether phosphate), 600# phosphate (phenylphenol polyoxyethylene ether phosphate), styrene polyoxyethylene ether ammonium sulfate, alkyl diphenyl ether disulfonic acid magnesium salt, triethanolamine salt, agricultural emulsion 400# (benzyldimethylphenol polyoxyethylene ether), agricultural emulsion 700# (alkylphenol formaldehyde resin polyoxyethylene ether), agricultural milk No. 36 (phenylethylphenol formaldehyde resin polyoxyethylene ether), agricultural milk No. 1600 (phenylethylphenol polyoxyethylene polypropylene ether), ethylene oxide-propylene oxide block copolymer, 5000HM (nonionic block), NP series (nonylphenol polyoxyethylene ether), BY series (castor oil polyoxyethylene ether), agricultural milk No. 33 (alkylaryl polyoxyethylene polyoxypropylene ether), VO/01 (composite nonionic emulsifier); at least one of span series (sorbitan monostearate), tween series (sorbitan fatty acid ester polyoxyethylene ether) and AEO series (fatty alcohol polyoxyethylene ether).
The dispersant comprises at least one of polycarboxylate, lignosulfonate, alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, calcium alkylbenzene sulfonate, naphthalene sulfonic acid formaldehyde condensate sodium salt, alkylphenol polyoxyethylene ether, fatty amine polyoxyethylene ether, fatty acid polyoxyethylene ether or glycerin fatty acid ester polyoxyethylene ether.
The wetting agent comprises at least one of sodium dodecyl sulfate, sodium dodecyl benzene sulfonate, nekal BX, wetting penetrant F, fructus Gleditsiae Abnormalis powder, faeces Bombycis and fructus Sapindi Mukouossi powder.
The penetrating agent comprises at least one of penetrating agent JFC (fatty alcohol-polyoxyethylene ether), penetrating agent T (diisooctyl maleate sulfonate), azone and organosilicon.
The auxiliary agent also comprises at least one of other functional auxiliary agents such as an antifreezing agent, a thickening agent, a stabilizing agent, a disintegrating agent, a defoaming agent and the like according to different use occasions and requirements.
Wherein the antifreeze agent comprises at least one of ethylene glycol, propylene glycol, glycerol and urea.
The thickener comprises at least one of xanthan gum, polyvinyl alcohol, bentonite, carboxymethyl cellulose and magnesium aluminum silicate.
The stabilizer comprises at least one of epoxidized soybean oil, epichlorohydrin, BHT, ethyl acetate and triphenyl phosphate.
The disintegrant comprises at least one of bentonite, urea, ammonium sulfate, aluminum chloride, low-substituted hydroxypropyl cellulose, lactose, citric acid, succinic acid, and sodium bicarbonate.
The antiseptic comprises at least one of formaldehyde, sodium benzoate, and cason.
The defoaming agent comprises at least one of silicone oil, silicone compounds, C10-C20 saturated fatty acid compounds and C8-C10 fatty alcohol compounds.
In the technical scheme of the invention, the sulfonepyraflufen, the terbutryn and the auxiliary components of the pesticide preparation can be purchased from the market.
The weeding composition can be prepared into any one preparation formulation suitable for agriculture by a conventional method, and the preferable preparation formulation is missible oil, aqueous emulsion, microemulsion, wettable powder, aqueous suspension, oil suspension or water dispersible granules.
In order to describe the herbicidal compositions provided in the embodiments of the present invention in more detail, the following description will be made with reference to specific examples, wherein the percentages in the examples are mass percentages, and the treatment doses of the field drug effect are the amounts of the effective ingredients.
Example 121% aqueous emulsion of Sulfoxaden and terbutryn (aqueous emulsion of Sulfoxaden and terbutryn 20:1 by weight)
The formula is as follows: 20% of Sulfoxaden; 1% of terbutryn; nongru NP-10 (emulsifier), 4%; castor oil polyoxyethylene ether (emulsifier), 4%; 3% of phenyl phenol polyoxyethylene ether phosphate (emulsifier); xylene (solvent), 30%; ethanol (solvent), 10%; xanthan gum (thickener), 0.1%; ethylene glycol (antifreeze), 5%; silicone compound (defoamer), 0.2%; sodium benzoate (preservative), 0.1%; water, make up to 100%.
The preparation method comprises the following steps: dissolving the sulfonepyraflufen, the terbutryn, the pesticide emulsion NP-10, the castor oil polyoxyethylene ether, the phenyl phenol polyoxyethylene ether phosphate and the solvent according to the formula proportion to form an oil phase, uniformly mixing water, glycol, sodium benzoate, xanthan gum and other components to form a water phase, dripping the oil phase into the water phase while shearing at a high speed in a reaction kettle, and shearing for a period of time to form the stable oil-in-water emulsion in water.
Example 216.5% aqueous emulsion of Sulfoxaden-terbutryn (mass percentage of Sulfoxaden and terbutryn aqueous emulsion is 10: 1)
The formula is as follows: 15% of Sulfoxaden; 1.5 percent of terbutryn; nongru NP-10 (emulsifier), 2%; castor oil polyoxyethylene ether (emulsifier), 2%; phenyl phenol polyoxyethylene ether phosphate (emulsifier), 2%; xylene (solvent), 30%; ethanol (solvent), 10%; xanthan gum (thickener), 0.1%; ethylene glycol (antifreeze), 5%; silicone compound (defoamer), 0.2%; sodium benzoate (preservative), 0.1%; water, make up to 100%.
The preparation method comprises the following steps: the preparation method is the same as that of example 1.
Example 360% wettable powder of Sulfoxaden and terbutryn (mass percentage of Sulfoxaden and terbutryn aqueous emulsion is 5: 1)
The formula is as follows: pyraflufen-ethyl, 50%; terbutryn, 10%; sodium dodecyl sulfate (wetting agent), 3%; calcium lignosulfonate (dispersant), 8%; white carbon black (filler), 18%; kaolin (filler), make up to 100%.
The preparation method comprises the following steps: according to the formula proportion, the sulfuryl pyraflufen and the terbutryn are added into the white carbon black and the kaolin, the sodium dodecyl sulfate and the calcium lignosulphonate are added into the white carbon black and the kaolin, the materials are mixed in a mixer, and the mixture is subjected to airflow crushing by an airflow crusher and then mixed to prepare the wettable powder.
Example 472% wettable powder of Sulfoxaden and terbutryn (mass percentage of Sulfoxaden and terbutryn aqueous emulsion is 2: 1)
The formula is as follows: pyraflufen-ethyl, 48%; terbutryn, 24%; sodium dodecyl sulfate (wetting agent), 3%; calcium lignosulfonate (dispersant), 8%; white carbon black (filler), 8%; kaolin (filler), make up to 100%.
The preparation method comprises the following steps: the same procedure was used to prepare example 3.
Example 580% wettable powder of Sulfoxaden and terbutryn (mass percentage of Sulfoxaden and terbutryn aqueous emulsion is 1: 1)
The formula is as follows: pyraflufen-ethyl, 40%; terbutryn, 40%; sodium lauryl sulfate (wetting agent), 4%; calcium lignosulfonate (dispersant), 10%; white carbon black (filler), 2 percent and kaolin (filler), and the balance is up to 100 percent.
The preparation method comprises the following steps: the same procedure was used to prepare example 3.
Example 66% Sulfoxaden terbutryn microemulsion (Sulfoxaden and terbutryn aqueous emulsion in mass percent 1: 2)
The formula is as follows: 2% of Sulfoxaden; 4% of terbutryn; ethanol (solvent), 8%; ethyl acetate (solvent) 8%; farm milk 600# (emulsifier), 16%; 5000HM (emulsifier), 2%; ethylene glycol (antifreeze); 3 percent; water, make up to 100%.
The preparation method comprises the following steps: according to the formula proportion, the sulfure pyraflufen and the terbutryn are completely dissolved by ethanol, ethyl acetate, pesticide emulsion 600# and 5000HM, then the ethylene glycol is added, the mixture is uniformly mixed, finally the water is added, and the mixture is fully stirred, so that the weeding composition microemulsion preparation can be prepared.
Example 716% Ethanesulfonopyrazole terbutryn emulsifiable concentrate (mass percent of the emulsion in water of sulfonylopyrazole and terbutryn 1: 3)
The formula is as follows: 4% of Sulfoxaden; 12% of terbutryn; farm milk 500# (emulsifier), 4%; nongru NP-10 (emulsifier), 5%; n-methylpyrrolidone (solvent), 5%; ethyl acetate (solvent), 20%; xylene (solvent), make up to 100%.
The preparation method comprises the following steps: adding the sulfonepyraflufen and the terbutryn into the N-methyl pyrrolidone and the dimethylbenzene according to the formula proportion, adding the agricultural milk 500#, the agricultural milk NP-10 and the ethyl acetate, and stirring and mixing uniformly in a stirring and mixing kettle. Wherein, the stirring and mixing kettle can be selected from an enamel reaction kettle, a stainless steel stirring kettle and the like.
Example 825% Sulfenpyrad terbutryn dispersible oil suspension (Sulfenpyrad terbutryn water emulsion 1:4 by weight)
The formula is as follows: 5% of Sulfoxaden; 20% of terbutryn; polycarboxylate (dispersant), 2 percent, VO/01 (compound nonionic emulsifier), 18 percent; bentonite (thickener), 1.3%; soybean oil, make up to 100%.
The preparation method comprises the following steps: according to the formula proportion, the sulfure pyraflufen-ethyl, the terbutryn, the polycarboxylate, the emulsifier VO/01 and the bentonite are sequentially placed in a reaction kettle, the soybean oil is added and uniformly mixed, and the product is obtained through high-speed shearing, wet sanding and finally homogenizing and filtering. Wherein, the main equipment comprises a batching kettle, a colloid mill or a homogeneous mixer and a sand mill.
Example 930% Sulfoxaden-terbutryn dispersible oil suspension (Sulfoxaden and terbutryn aqueous emulsion in mass percent 1: 5)
The formula is as follows: 5% of Sulfoxaden; terbutryn, 25%; pesticide milk BY-125 (emulsifier), 5%; polycarboxylate (dispersant), 2%; VO/01 (compounded non-ionic emulsifier), 18%; bentonite (thickener), 0.8%; soybean oil, make up to 100%.
The preparation method comprises the following steps: according to the formula proportion, the sulfure pyraflufen, the terbutryn, the pesticide emulsion BY-125, the polycarboxylate, the VO/01 and the bentonite are sequentially placed in a reaction kettle, oil is added, the materials are uniformly mixed, and the product is obtained through high-speed shearing, wet sanding and finally homogenizing and filtering. Wherein, the main equipment comprises a batching kettle, a colloid mill or a homogeneous mixer and a sand mill.
Example 1035% aqueous suspension of Sulfoxaden-terbutryn (aqueous emulsion of Sulfoxaden and terbutryn 1:6 by weight)
The formula is as follows: 5% of Sulfoxaden; 30% of terbutryn; nongru NP-10 (emulsifier), 3%; polycarboxylate (dispersant), 5%; xanthan gum (thickener), 0.1%; magnesium aluminum silicate (thickener), 1%; ethylene glycol (antifreeze), 3%; silicone compound (defoamer), 0.2%; water, make up to 100%.
The preparation method comprises the following steps: according to the formula proportion, the sulfuryl pyraflufen, the terbutryn, the pesticide emulsion NP-10, the polycarboxylate, the xanthan gum, the magnesium aluminum silicate, the glycol and the silicone compound are sequentially placed in a reaction kettle, water is added for uniform mixing, and the product is obtained through high-speed shearing, wet sanding and finally homogeneous filtration. Wherein, the main equipment comprises a batching kettle, a colloid mill or a homogeneous mixer and a sand mill.
Example 1166% Sulfenpyrazole terbutryn water dispersible granule (the mass percentage of the Sulfenpyrazole and terbutryn water emulsion is 1: 10)
The formula is as follows: 6% of Sulfoxaden; terbutryn, 60%; sodium dodecylbenzenesulfonate (wetting agent), 3%; alkyl naphthalene sulfonate formaldehyde condensate (dispersant), 8%; water is added according to different preparation methods; attapulgite (filler), make up to 100%.
The preparation method comprises two methods: adding the sulfonepyraflufen-ethyl and the terbutryn into the attapulgite according to the formula proportion, adding the sodium dodecyl benzene sulfonate and the alkyl naphthalene sulfonate formaldehyde condensate, mixing, performing jet milling, adding 10% of water, kneading, granulating, drying and screening to obtain the water dispersible granule product.
And secondly, adding the sulfonepyrazoxazole and the terbutryn into the attapulgite according to the formula proportion, adding the sodium dodecyl benzene sulfonate and the alkyl naphthalene sulfonate formaldehyde condensate into the attapulgite, mixing, spraying water on the powder subjected to airflow crushing in a boiling granulator, granulating, drying, and screening to obtain the water dispersible granule product.
Wherein, the main equipment comprises a mixer, a jet mill, a kneader, an extrusion granulator, a drying room or a fluidized bed for drying, or a boiling granulator and a sieving machine.
Example 1263% Sulfoxaden terbutryn Water dispersible granule (Sulfoxaden and terbutryn emulsion in water 1:20 by weight)
The formula is as follows: 3% of Sulfoxaden; terbutryn, 60%; sodium dodecylbenzenesulfonate (wetting agent), 3%; alkyl naphthalene sulfonate formaldehyde condensate (dispersant), 8%; water is added according to different preparation methods; attapulgite (filler), make up to 100%.
The preparation method comprises the following steps: the same procedure was followed as in example 11.
The weeding composition preparation obtained in the embodiment of the invention is subjected to indoor combined toxicological bioassay experiments and field efficacy verification.
Indoor toxicological bioassay of sultoprazole and terbutryn
Reagent to be tested: 95% of Sulfopyrazole technical and 95% of terbutryn technical
Blank control solution: 1ml of DMF plus 400ml of 0.1% of TWEEN80 emulsifier in water
Test targets: physalis pubescens and green cabbage
The experimental method comprises the following steps: through indoor bioassay, the foxtail sweet and the green lettuce are taken as bioassay objects, and no herbicide is appliedThe soil of the formulation, which had a pH of 6.8, was air-dried, sieved, and quantitatively placed in a plastic pot having a diameter of 32cm and a depth of 20 cm. Referring to part 4 of herbicide of NY/T1155.4-2006 pesticide indoor bioassay test standard, processing by stem leaf spraying method, specifically sowing 30 weed seeds of a target to be tested in a plastic bowl, covering with 1cm thick fine soil, culturing in a controllable greenhouse with a day temperature of (25 + -2) deg.C, a night temperature of (20 + -2) deg.C, a light irradiation period of 16D/8L, and a light irradiation intensity of 1400 μmol/(m)2S) relative humidity of (70. + -. 5)%. And (3) carrying out stem leaf spraying treatment when the weeds grow to 2-5 leaves, spraying 1mL of liquid for each pot, repeating each treatment for 4 times, and setting the treatment without the pesticide as a control experiment. And (4) continuously placing the treated test material in a controllable greenhouse for culturing, regularly observing the growth condition of the target weeds, measuring the fresh weight of the plant after 15 days, and evaluating the toxicity of the medicament on the target weeds by using the fresh weight inhibition rate.
Fresh weight inhibition ratio P (%) [ (control fresh weight-treated fresh weight)/control fresh weight ] × 100%
And (3) performing data statistics and analysis by adopting a combined action evaluation method, specifically adopting DPS software analysis to calculate a toxicity equation, an LC50 value (mg/L) and a co-toxicity coefficient.
Respectively establishing virulence regression equations by taking the logarithm value of the medicament concentration (mg/L) as an independent variable x and taking the value of the fresh weight inhibition rate as a dependent variable y, calculating LC50 of a single agent and each proportion by adopting DPS software, and calculating a virulence index and a cotoxicity coefficient (CTC) according to a Sunfei method, wherein the calculation formula is as follows (taking the sulpyrazoxazole as a standard medicament and the virulence index thereof is 100):
measured virulence index (ATI) ═ standard medicament LC 50/test medicament LC50 × 100
Theoretical virulence index (TTI) ═ Sigma (virulence index ATI of a certain active principle x the percentage content of this active principle in the mixture)
Co-toxicity coefficient (CTC) ═ measured toxicity index (ATI) of the mixture/Theoretical Toxicity Index (TTI) of the mixture x 100
The CTC is synergistic when the CTC is more than 120, antagonistic when the CTC is less than 80, and additive when the CTC is 80-120.
TABLE 1 determination of toxicity of Aleurites montana with different ratios of effective components
Figure BDA0003434929730000101
Figure BDA0003434929730000111
As can be seen from Table 1, the mass ratio of the sulfonepyrazoxazole to the terbutryn is 20: 1-1: at 20, CTC values are all greater than 80, showing a synergistic effect, wherein the ratio of sulfonepyrazoxazole: the mass ratio of the terbutryn is 1: when the toxicity is 1-3, the co-toxicity coefficient is more than 160, the synergistic effect is the best, LC50 is also smaller, and the toxicity is also lower.
TABLE 2 determination of toxicity of effective components in different proportions to Gynura procumbens
Figure BDA0003434929730000112
As can be seen from Table 2, the mass ratio of the sulfonepyrazoxazole to the terbutryn is 20: 1-1: in the range of 20, CTC values are all greater than 80, showing a synergistic effect, wherein in the case of xaflufen: the mass ratio of the terbutryn is 1: when the ratio is 1-3, the co-toxicity coefficient is more than 170, and the synergistic effect is the best.
In conclusion, the mass ratio of the sulfonepyraflufen to the terbutryn is 20: 1-1: when the total toxicity is 20 hours, the cotoxicity coefficients are all larger than 100, which shows that the compounding of the pyraflufen-ethyl and the terbutryn has a synergistic effect on weeds in wheat fields, and the composition has the following effects that: the mass ratio of the terbutryn to the terbutryn is 1: 1-1: and 3, the synergistic effect is most obvious, and the co-toxicity coefficient reaches the highest value.
In order to further prove that the compound of the topramezone and the terbutryn has a synergistic effect on preventing and controlling weeds in wheat fields when the compound is used in the fields, a field efficacy test method is adopted.
The weeds in the experimental wheat field mainly comprise barnyard grass, Japanese alopecurus, acalypha australis, descurainia sophia and the like. The application agent was the formulation of the herbicidal composition obtained in examples 2-9, the control agent was 40% xaflufen OD, 50% terbutryn SC and the blank control was clear water.
In the field efficacy test of the experimental wheat, 11 treatment areas including the chemical, the contrast chemical and the clear water are arranged in the embodiment, and the area of each test cell is 50m2The test cells are arranged randomly, 0.5m protection rows are arranged between each test cell and around the test field, each treatment is repeated for 4 times, and the application rate per mu is the same. In the weed 2-5 leaf period, the worker-agriculture-16 type manual sprayer is used for carrying out conventional spraying, no rainfall occurs within 24 hours of pesticide application, no special severe weather exists during the test period, and the field is subjected to conventional management.
The growth of wheat was visually observed at 3 rd, 7 th, 15 th and 30 th days after application of the drug, and whether the drug injury occurred or not was observed. The weed control effect is investigated 15d and 30d after pesticide application respectively according to 'pesticide field efficacy test criteria' GB/T17980.30-2000. The investigation method is to sample four points from each test cell diagonal, each point is 0.25m2Record the number of weed plants. The prevention effect calculation method comprises the following steps:
Figure BDA0003434929730000121
TABLE 315 d results of the efficacy of the treatment Agents against weeds in wheat fields
Figure BDA0003434929730000122
Figure BDA0003434929730000131
TABLE 430 d results of efficacy of treatment agents against wheat field weeds
Figure BDA0003434929730000132
According to the data in tables 3 and 4, the weeding effect of the weeding composition in the embodiment of the invention is obviously higher than that of the single agent of the pyriftalid and the single agent of the terbutryn in the wheat field, after the weeding composition is compounded according to a certain proportion, the plant control effect of the herbicide in the embodiment can reach more than 90%, and the weeding composition is found by comparing a blank group of applied clear water, the weeds in the blank group area grow vigorously, the plants are tall and erect, the weeds in the applied area are withered and yellow, and the root system is dead, so that the synergistic effect can be achieved after the pyriftalid and the terbutryn are compounded; in addition, in field experiments, the growth condition of crops is not influenced, the biological safety is high, and the environmental compatibility is good.
The average plant control effect of the examples 5, 6 and 7 is obviously higher than that of the medicaments in other proportions, and reaches more than 98% after 30 days, which indicates that the total effective amount of the topramezone: terbutryn (mass ratio) 1: 1-1: the best effect is obtained at 3 days. In the experiment, the single terbutryn preparation has poor effect of controlling the resistant barnyard grass and low drug effect persistence, and the sulpirfen can make up the deficiency, expand the weed control spectrum and prolong the drug effect time.
The above-described preferred embodiments are only for explaining the present invention in detail, and the scope of the present invention includes but is not limited thereto. Those skilled in the art can make appropriate modifications without departing from the invention, but such modifications are also intended to be within the scope of the invention.

Claims (10)

1. The weeding composition is characterized in that the effective components of the weeding composition comprise pyriftalid and terbutryn.
2. The weeding composition according to claim 1, wherein the mass ratio of the xaflufen to the terbutryn is 20: 1-1: 20.
3. the herbicidal composition as claimed in claim 1, wherein the amount of the xaflufen-ethyl and terbutryn is 6 to 80% by mass of the herbicidal composition.
4. The herbicidal composition of claim 1, further comprising a pesticide formulation adjuvant, the pesticide formulation adjuvant comprising a carrier and an adjuvant.
5. A herbicidal composition according to claim 4, characterized in that the carrier comprises at least one of water, solvent and filler.
6. A herbicidal composition according to claim 4, characterized in that the adjuvant comprises a surfactant comprising at least one of an emulsifier, a dispersant, a wetting agent and a penetrant.
7. A herbicidal composition according to claim 6, characterized in that the adjuvant further comprises at least one of an anti-freeze agent, a thickener, a stabilizer, a preservative, a disintegrant and an anti-foaming agent.
8. The herbicidal composition according to any one of claims 1 to 7, wherein the formulation of the herbicidal composition is any one suitable for agricultural use.
9. A herbicidal composition according to claim 8, characterized in that the herbicidal composition is in the form of emulsifiable concentrate, aqueous emulsion, microemulsion, wettable powder, aqueous suspension, oil suspension or water dispersible granule.
10. Use of the herbicidal composition according to any one of claims 1 to 7 for the control of weeds in wheat and rice fields.
CN202111609605.7A 2021-12-27 2021-12-27 Weeding composition and application thereof Pending CN114208837A (en)

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WO2023221918A1 (en) * 2022-05-16 2023-11-23 Adama Agan Ltd. Herbicidal mixture, herbicidal composition, method, use, and kits for controlling undesirable vegetation

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CN101562976A (en) * 2006-12-21 2009-10-21 组合化学工业株式会社 Herbicide composition
CN110063333A (en) * 2019-05-21 2019-07-30 青岛瀚生生物科技股份有限公司 Herbicidal composition for rice field and its application
CN111685122A (en) * 2020-08-04 2020-09-22 陕西上格之路生物科学有限公司 Tertiary weeding composition containing terbuthylazine

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CN101562976A (en) * 2006-12-21 2009-10-21 组合化学工业株式会社 Herbicide composition
CN103202308A (en) * 2006-12-21 2013-07-17 组合化学工业株式会社 Herbicide composition
CN110063333A (en) * 2019-05-21 2019-07-30 青岛瀚生生物科技股份有限公司 Herbicidal composition for rice field and its application
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