CN111685121A - Weeding composition containing oxyfluorfen-ethyl acetate and benzobicyclon - Google Patents
Weeding composition containing oxyfluorfen-ethyl acetate and benzobicyclon Download PDFInfo
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- CN111685121A CN111685121A CN202010621236.2A CN202010621236A CN111685121A CN 111685121 A CN111685121 A CN 111685121A CN 202010621236 A CN202010621236 A CN 202010621236A CN 111685121 A CN111685121 A CN 111685121A
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- fluroxypyr
- meptyl
- benzobicyclon
- herbicidal composition
- weeds
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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
- A01N43/34—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom
- A01N43/40—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having rings with one nitrogen atom as the only ring hetero atom six-membered rings
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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
- A01N41/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom
- A01N41/02—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a sulfur atom bound to a hetero atom containing a sulfur-to-oxygen double bond
- A01N41/10—Sulfones; Sulfoxides
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Abstract
The invention discloses a weeding composition containing fluroxypyr-meptyl and benzobicyclon. The mass ratio of fluroxypyr-meptyl to benzobicyclon is 1: 50-50: 1. The fluroxypyr meptyl and the benzobicyclon are compounded, so that the fluroxypyr meptyl and the benzobicyclon have higher control effect on target weeds, can effectively reduce the use amount of pesticides, improve the quick response of weeding, and are suitable for controlling the weeds in paddy fields.
Description
Technical Field
The invention belongs to the technical field of pesticides, and particularly relates to a weeding composition containing oxyfluorfen-ethyl acetate and benzobicylon.
Background
Fluroxypyr-meptyl (fluroxypyr-meptyl) is a pyridine herbicide, can effectively inhibit the synthesis of acetolactate synthase and hinder the synthesis of branched chain amino acids such as leucine, isoleucine and the like in weeds, thereby inhibiting the synthesis of related proteins, and belongs to an internal absorption conduction type post-seedling stem leaf treatment herbicide. The fluroxypyr meptyl is only used for preventing and killing broad-leaf weeds, has poor effect on preventing and killing gramineous weeds, and is suitable for various broad-leaf weeds in gramineous crop fields such as rice, wheat, corn and the like.
Benzobicyclon is a bicyclooctane selective, inward-sucking and conducting broad-spectrum herbicide with p-hydroxyphenylpyruvate dioxygenase (HPPD) as a target. The benzobicyclon has wide herbicidal spectrum, slow release effect, wide treating period and long acting period. The herbicide is absorbed by the weed roots and the bottom stem, conducted through the whole weed, resulting in the albino of the new leaves. The bicyclosulfuron-methyl belongs to an environment-friendly pesticide, is safe to rice, has low toxicity to fishes and mammals, has a unique structure of the pesticide in a molecule, and has chemical characteristics of gradual release of target enzymes. The chemical structural formula is as follows:
weeds inhibit the growth and development of crops by competing with the crops for fertilizer, water, growth space and other sensible effects, thereby resulting in reduced yield, and thus, farmland weeds are an important factor hindering the rapid and sustained development of agriculture. The chemical herbicide is still one of the important measures for preventing and killing weeds, the herbicide variety containing a single active component has defects of different degrees in weed control, and the weeds are easy to generate drug resistance after continuous use, so that the problems of narrow weed control spectrum, environmental pollution and the like occur. The reasonable compounding of the herbicide is an effective method for improving the preventing and killing effect, expanding the weed control spectrum, delaying the drug resistance of weeds, reducing the environmental pollution, reducing the use cost and reducing the herbicide residue. After the test of the applicant, the fluroxypyr-meptyl and the benzobicyclon are mixed, so that the fluroxypyr-meptyl and the fluroxypyr-meptyl have obvious synergistic control effect on multiple dicotyledonous weeds such as eclipta prostrata, monochoria crenata, field sowthistle and the like and monocotyledonous weeds such as barnyard grass, moleplant, rice leek, abnormal sedge, Iris lactea and the like. The weeding composition has the characteristics of remarkably improving the control effect on weeds in paddy fields, expanding the weeding spectrum, reducing the dosage, reducing the control cost and the like; also improves the safety to crops and solves a series of problems caused by long-term use of single-component herbicides. And the search shows that the blending of fluroxypyr-containing isooctyl ester and benzobicyclon is not reported.
Disclosure of Invention
The invention aims to provide a weeding composition containing the fluroxypyr-meptyl and the benzobicyclon, which has the advantages of reasonable components, low medication cost, obvious synergistic effect, good weeding effect, wide weed control spectrum and safety to crops.
It is another object of the present invention to provide a formulation of a herbicidal composition comprising fluroxypyr meptyl ester and mesotrione.
It is still another object of the present invention to provide use of the above herbicidal composition for controlling weeds in paddy fields.
The technical scheme of the invention is as follows:
a weeding composition containing fluroxypyr-meptyl and benzobicyclon comprises active ingredients A and B, wherein the active ingredients A are fluroxypyr-meptyl, and the active ingredients B are benzobicyclon;
further, the weight ratio of the fluroxypyr-meptyl to the benzobicyclon is 1: 50-50: 1;
further, the weight ratio of the fluroxypyr-meptyl to the benzobicyclon is 1: 20-15: 1;
further, the mass ratio of the fluroxypyr-meptyl to the benzobicyclon is 1: 15-10: 1;
further, the mass ratio of the fluroxypyr-meptyl to the benzobicyclon is 1: 10-5: 1;
further, the content of fluroxypyr-meptyl and the benzobicyclon in the weeding composition is 5-90% by mass, and preferably 10-60% by mass.
A weeding composition containing fluroxypyr-meptyl and benzobicyclon is prepared into any one dosage form by taking fluroxypyr-meptyl and benzobicyclon as effective components and a pesticide-allowed auxiliary agent;
the auxiliary agent plays an important role in preparation processing, is various additives necessary for processing raw medicines into the preparation, and generally has no biological activity. The addition of the dispersing agent, the wetting agent and the dispersing wetting agent improves the suspension rate of the original medicine, thereby improving the distribution uniformity of the medicine when in use; the addition of the antifreezing agent improves the low-temperature stability of the medicament and facilitates low-temperature storage; the defoaming agent enables all components to be fully contacted, and the influence of foam on the quality of the medicament in the grinding process is reduced; the addition of the antiseptic thickener prolongs the storage time of the medicament;
furthermore, the dosage form of the weeding composition is any one of powder, granules, wettable powder, water dispersible granules, soluble granules, missible oil, suspending agents, water aqua, emulsion in water, microemulsion, soluble liquid and dispersible oil suspending agents;
furthermore, the dosage form of the weeding composition is missible oil, suspending agent, granules, wettable powder, water dispersible granules, dispersible oil suspending agent and emulsion in water;
further, the emulsifiable concentrates may use as auxiliaries: emulsifiers such as fatty alcohol polyoxyethylene ether, alkylphenol polyoxyethylene polyoxypropylene ether, castor oil ethylene oxide adduct and its derivatives, polyoxyethylene polyoxypropylene block copolymer, calcium dodecylbenzenesulfonate; a solvent such as one or more of trimethylbenzene, methyl oleate, N-dimethyldecanamide, dimethyl sulfoxide, propylene carbonate;
further, the suspending agents may use as auxiliaries: dispersants such as one or more of polycarboxylate, lignosulfonate, alkylnaphthalene sulfonate (diffuser NNO), etc.; the emulsifier is one or more of BY (castor oil polyoxyethylene ether) series emulsifiers (BY-110, BY-125 and BY-140), Nongru 700# (alkylphenol formaldehyde resin polyoxyethylene ether), Nongru 2201, span-60 # (sorbitan monostearate), Tween-60 # (sorbitan monostearate polyoxyethylene ether), Nongru 1601# (phenethylphenol polyoxyethylene polyoxypropylene ether) and the like; wetting agents such as one or more of alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate, naphthalene sulfonate, and the like; thickening agent such as one or more of white carbon black, polyvinyl alcohol, bentonite, magnesium aluminum silicate, etc.; antifreeze agents such as one or more of alcohols, alcohol ethers, chlorinated hydrocarbons and inorganic salts; the carrier is deionized water;
further, the granules may use as auxiliaries: one or more solvents such as dimethylformamide, ethyl acetate, methanol, dichloromethane, etc.; stabilizers such as one or more of 1, 2-butanediol, oxalic acid, polyethylene glycol, urea, and the like; binder such as one or more of dextrin, starch, glucose, polyvinyl alcohol, polyethylene glycol, sodium carboxymethylcellulose, sucrose, etc.; filler such as one or more of diatomite, kaolin, white carbon black, light calcium carbonate, talcum powder, attapulgite, pottery clay and the like;
further, as the wettable powder, there can be used: dispersing agents such as one or more of polycarboxylate, lignosulfonate, polyoxyethylene polyoxypropylene ether block copolymer, alkyl naphthalene formaldehyde condensate sulfonate, alkylphenol polyoxyethylene ether phosphate, fatty alcohol polyoxyethylene ether phosphate, alkylphenol polyoxyethylene ether sulfonate and the like; wetting agents such as one or more of alkyl sulfates, alkyl sulfonates, alkyl naphthalene sulfonates, and the like; fillers such as one or more of ammonium sulfate, urea, sucrose, glucose, diatomaceous earth, kaolin, white carbon black, light calcium carbonate, talcum powder, attapulgite, pottery clay and the like;
further, the water dispersible granule may use the following additives: a dispersant such as one or more of polycarboxylate, lignosulfonate, alkylnaphthalene sulfonate, etc.; wetting agents such as one or more of alkyl sulfates, alkyl sulfonates, naphthalene sulfonates, and the like; disintegrating agent such as one or more of ammonium sulfate, sodium sulfate, aluminum chloride, sodium chloride, polyvinylpyrrolidone, starch or its derivatives, bentonite, etc.; binder such as one or more of starch, glucose, polyvinyl alcohol, polyethylene glycol, sodium carboxymethylcellulose, sucrose, etc.; filler such as one or more of diatomite, kaolin, white carbon black, light calcium carbonate, talcum powder, attapulgite, pottery clay and the like;
further, the dispersible oil suspension can use the following auxiliaries: dispersants such as one or more of polycarboxylate, lignosulfonate, alkylnaphthalene sulfonate (diffuser NNO), etc.; the emulsifier is one or more of BY (castor oil polyoxyethylene ether) series emulsifiers (BY-110, BY-125 and BY-140), Nongru 700# (alkylphenol formaldehyde resin polyoxyethylene ether), Nongru 2201, span-60 # (sorbitan monostearate), Tween-60 # (sorbitan monostearate polyoxyethylene ether), Nongru 1601# (phenethylphenol polyoxyethylene polyoxypropylene ether) and the like; wetting agents such as one or more of alkylphenol polyoxyethylene ether formaldehyde condensate sulfate, alkylphenol polyoxyethylene ether phosphate, phenethylphenol polyoxyethylene ether phosphate, alkyl sulfate, alkyl sulfonate, naphthalene sulfonate, and the like; thickening agent such as one or more of white carbon black, polyvinyl alcohol, bentonite, magnesium aluminum silicate, etc.; one or more of antifreeze such as ethylene glycol, propylene glycol, glycerol, urea, inorganic salts such as sodium chloride, etc.; dispersing medium such as one or more of soybean oil, rapeseed oil, wheat oil, methyl oleate, diesel oil, engine oil, mineral oil, etc.;
further, the aqueous emulsion may use the following auxiliaries: a solvent such as one or more of benzene, toluene, xylene, durene, methanol, ethanol, isopropanol, n-butanol, dimethyl sulfoxide, dimethylformamide, cyclohexanone, alkylene carbonate, diesel oil, mineral spirits, vegetable oils, vegetable oil derivatives and water; emulsifiers such as one or more of calcium dodecylbenzenesulfonate, alkylphenol formaldehyde resin polyoxyethylene ether, phenethylphenol polyoxyethylene polyoxypropylene ether, fatty alcohol ethylene oxide-propylene oxide copolymer, styrylphenol polyoxyethylene ether, castor oil polyoxyethylene ether, and alkylphenol ether phosphate; antifreeze agents such as one or more of alcohols, alcohol ethers, chlorinated hydrocarbons and inorganic salts;
further, the composition is missible oil which comprises the following components in percentage by mass: 10 to 60 percent of fluroxypyr-meptyl and benzobicyclon, 5 to 10 percent of emulsifier, 0.5 to 5 percent of stabilizer and the balance of solvent;
further, the composition is a suspending agent, and the suspending agent comprises the following components in percentage by mass: 10-60% of fluroxypyr-meptyl and benzobicyclon, 1-10% of dispersant, 1-5% of wetting agent, 0.5-5% of thickening agent, 1-5% of antifreezing agent and the balance of deionized water;
further, the composition is granules, and the granules consist of the following components in percentage by mass: 10 to 60 percent of fluroxypyr-meptyl and benzobicyclon, 1 to 5 percent of solvent, 1 to 5 percent of stabilizer, 0.5 to 10 percent of adhesive and the balance of filler;
further, the composition is wettable powder, and the wettable powder comprises the following components in percentage by mass: 10-60% of fluroxypyr-meptyl and benzobicyclon, 1-20% of dispersing agent, 1-5% of wetting agent and the balance of filler;
further, the composition is a water dispersible granule which comprises the following components in percentage by mass: 10-60% of fluroxypyr-meptyl and benzobicyclon, 1-10% of dispersing agent, 1-10% of wetting agent, 1-10% of disintegrating agent, 1-5% of binding agent and the balance of filler;
further, the composition is a dispersible oil suspending agent, and the dispersible oil suspending agent consists of the following components in percentage by mass: 10-60% of fluroxypyr-meptyl and benzobicyclon, 1-8% of dispersant, 1-10% of emulsifier, 1-5% of wetting agent, 1-5% of thickener, 1-10% of antifreeze and the balance of dispersion medium;
further, the composition is an aqueous emulsion which comprises the following components in percentage by mass: 10 to 60 percent of fluroxypyr-meptyl and benzobicyclon, 1 to 10 percent of solvent, 0.5 to 10 percent of emulsifier, 0.5 to 10 percent of antifreeze and the balance of deionized water.
A herbicidal composition containing isooctyl fluroxypyr and mesotrione for use against unwanted vegetation;
further, the herbicidal composition containing the isooctyl fluroxypyr and the benzobicyclon is applied to the growing place and/or the leaves and/or the stems of unwanted plants;
still further, the growing field of the unwanted plants is a paddy field;
further, the unwanted plants are monocotyledonous weeds and/or dicotyledonous weeds, still preferably, the monocotyledonous weeds are one or more of barnyard grass, moleplant seeds, Leersia graminis and Cyperus rotundus, and the dicotyledonous weeds are one or more of eclipta prostrata, monochoria vaginalis and Indian iphigenia bulb.
The invention has the beneficial effects that:
the invention has reasonable components and lasting drug effect, is applied at one time, and can control various weed hazards in the rice growth period; the weeding composition has good weeding effect and low drug cost, and the activity and the weeding effect of the weeding composition are not simple superposition of the activities of all components, but have obvious synergistic effect, can expand the weed control spectrum, delay resistance, have good safety to crops, and meet the safety requirement of pesticide preparations. The invention has good control effect on weeds such as barnyard grass, moleplant seed, rice leek grass, nutgrass flatsedge, snakehead intestine, monochoria vaginalis, short arrowhead, long-noded sedge, strange lettuce and the like in the rice field.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more concise and clear, the present invention is described with the following specific embodiments, but the present invention is by no means limited to these embodiments. The following described examples are only preferred embodiments of the present invention, which can be used to describe the present invention and should not be construed as limiting the scope of the present invention. It should be understood that any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Preparation examples of formulations
In order to better illustrate the invention, the following examples are given to further illustrate the invention.
Example 1: 17% fluroxypyr-meptyl-benzobicyclon emulsifiable concentrate (15:2)
The formula comprises 15 percent of fluroxypyr-meptyl, 2 percent of benzobicyclon, 30 percent of dimethyl sulfoxide, 5 percent of fatty alcohol-polyoxyethylene ether, 9 percent of alkylphenol polyoxyethylene polyoxypropylene ether, 1 percent of calcium dodecyl benzene sulfonate and methyl oleate which are complemented for the rest;
the preparation method comprises the following steps: adding effective components including fluroxypyr-meptyl and benzobicyclon into a carrier according to the formula proportion of an embodiment, adding a surfactant and other functional auxiliaries, and uniformly stirring and mixing in a stirring and mixing kettle to obtain the emulsifiable concentrate.
Example 2: 22% fluroxypyr-meptyl-benzobicyclon suspension (10:1)
The formula is as follows: 20% of fluroxypyr-meptyl, 2% of benzobicyclon, 2% of sodium alkyl sulfate, 3% of alkylphenol formaldehyde resin polyoxyethylene ether, 0.4% of carboxymethyl cellulose, 4% of propylene glycol, 0.2% of isothiazolinone and deionized water, and the balance being made up;
the preparation method comprises the following steps: according to the formula proportion, the effective components of fluroxypyr-meptyl, the benzobicyclon, the surfactant and other functional additives are sequentially placed in a reaction kettle, water is added for uniform mixing, and the suspending agent product is obtained through high-speed shearing, wet sanding and finally homogeneous filtration.
Example 3: 15% fluroxypyr-meptyl-benzobicyclon suspension (2:1)
The formula is as follows: 10% of fluroxypyr-meptyl, 5% of benzobicyclon, 8% of dodecyl polyoxyethylene ether phosphate, 2% of sodium alkyl polyoxyethylene ether sulfonate, 0.4% of xanthan gum, 0.1% of carboxyethyl cellulose, 4% of sorbitol, 0.1% of sodium benzoate, 0.5% of silicone oil and deionized water, and the balance being made up;
the preparation method comprises the following steps: the same as in example 2.
Example 4: 30% fluroxypyr-meptyl-benzobicyclon wettable powder (1:1)
The formula is as follows: 15% of fluroxypyr-meptyl, 15% of benzobicyclon, 5% of calcium alkyl naphthalene formaldehyde condensate sulfonate, 6% of sodium alkyl phenol polyoxyethylene ether sulfonate, 3% of sodium alkyl naphthalene sulfonate, 5% of talcum powder and diatomite for balancing;
the preparation method comprises the following steps: according to the formula proportion of the embodiment, the effective components of fluroxypyr-meptyl and the benzobicyclon are added into the carrier, the surfactant and other functional additives are added into the carrier, the mixture is mixed, and the mixture is subjected to airflow crushing and then mixed to prepare the wettable powder.
Example 5: 30% fluroxypyr-meptyl-benzobicyclon water dispersible granule (5:1)
The formula is as follows: 25% of fluroxypyr-meptyl, 5% of benzobicyclon, 3% of polycarboxylate GY-D06, 4% of sodium dodecyl sulfate, 1% of sodium alkyl sulfonate, 2% of cane sugar and argil, and the balance being made up;
the preparation method comprises the following steps: according to the formula proportion of the embodiment, effective components of fluroxypyr-meptyl and benzobicyclon are added into a carrier, a surfactant and other functional auxiliaries are added into the carrier, the carrier and the carrier are mixed, 10-25% of water is added after the mixture is subjected to airflow crushing, and then the water dispersible granule product is prepared through kneading, granulating, drying and screening.
Example 6: 32% fluroxypyr-meptyl-bicyclicumulone dispersible oil suspending agent (15:1)
The formula is as follows: 30% of fluroxypyr-meptyl, 2% of benzobicyclon, 2% of sodium polycarboxylate, 4% of farm emulsion 1601#, 3% of tween-60 #, 4% of farm emulsion 2201, 1% of sodium alkyl sulfate, 0.5% of bentonite, 4% of propylene glycol and soybean oil for supplementing the balance of the foot;
the preparation method comprises the following steps: according to the formula proportion, the effective components of fluroxypyr-meptyl, the benzobicyclon, the surfactant and other functional additives are sequentially placed in a reaction kettle, added with oil and uniformly mixed, and subjected to high-speed shearing, wet sanding and finally homogeneous filtration to obtain the product.
Example 7: 25% fluroxypyr-meptyl bicyclophorione emulsion in water (4:1)
The formula is as follows: 20% of fluroxypyr-meptyl, 5% of benzobicyclon, 2% of dimethylformamide, 4% of calcium dodecylbenzenesulfonate, 2% of calcium dodecylbenzenesulfonate, 3% of ethylene glycol and deionized water to make up the balance;
the preparation method comprises the following steps: dissolving effective components including fluroxypyr-meptyl and benzobicyclon into a solvent according to a formula ratio, adding an emulsifier, dissolving into a uniform oil phase, and mixing deionized water and an anti-freezing agent together to form a uniform water phase; under high-speed shearing, adding the water phase into the oil phase to form well-dispersed aqueous emulsion.
Example 8: 40% fluroxypyr-meptyl-benzobicyclon granules (3:1)
The formula is as follows: 30% of fluroxypyr-meptyl, 10% of benzobicyclon, 5% of dimethylformamide, 4% of butanediol, 1% of starch and diatomite in balance;
the preparation method comprises the following steps: according to the formula proportion, the effective components of fluroxypyr-meptyl and the benzobicyclon are dissolved in a solvent, the solvent is added, the diatomite is dried and screened and then stored in a storage bin, then the diatomite, the medicament, the stabilizer and the adhesive are added in a drum-type rotary granulator according to the proportion sequence for mixing granulation, and then the granules are obtained through drying and detection.
Activity assay
Example 9:
the test basis is as follows: NY/T1155.9-2008 "indoor bioassay of pesticides test criteria herbicides part 9: test stem and leaf spray method for determining activity of paddy field herbicide (Y/T1155.7-2006 herbicide part 7 in indoor bioassay test criteria for pesticides: combined action assay of compounding.
Test targets: barnyard grass, moleplant seed, monochoria vaginalis, short arrowhead, abnormal-shaped sedge and Chinese iris.
Reagent to be tested: 98 percent of fluroxypyr-meptyl ester raw material and 98 percent of bicyclosulfotone raw material are provided by research and development centers of Heliel pharmaceutical industry group Limited.
Preparation of the medicament: dissolving the raw materials with dimethylformamide, diluting with 0.1% Tween 80 water solution, and preparing into 5 series of mass concentrations according to an equal ratio method for use.
The test method comprises the following steps: respectively sowing quantitative grass seeds in pots with the diameter of 9cm, culturing in a light incubator, and performing spray treatment on 20 plants per pot when weeds grow to the 1-3 leaf stage. The treated weeds were cultured in a greenhouse, the weed control effect of each treatment was periodically observed, and the fresh weight of each treated weed was recorded after 14 days.
And (3) test treatment: repeat for 4 times in each treatment setting, and set clear water as a control.
Data investigation: and (5) calculating the fresh weight control effect of each treatment after the spraying treatment in 14 d.
The calculation formula is as follows:
the weed fresh weight inhibition ratio (E)% (fresh weight of weeds in blank area-fresh weight of weeds in control area)/fresh weight of weeds in blank area) x 100
Theoretical fresh weight inhibition ratio (E) of mixed herbicide0) The fresh weight inhibition ratio of the compound A at the dosage of P + the fresh weight inhibition ratio of the compound B at the dosage of Q- (the fresh weight inhibition ratio of the compound A at the dosage of P × of the compound B at the dosage of Q)/100.
The combined action evaluation standard of the mixed medicament is as follows:
E-E0more than 10% is synergistic effect, E-E010% below is antagonistic, E-E0An addition of. + -. 10% is obtained.
The test results are shown in the following tables:
according to the indoor activity, the blending of fluroxypyr-meptyl and the benzobicyclon has good indoor activity on common weeds in the paddy field. The blending of fluroxypyr-meptyl and the benzobicyclon has an additive effect on the barnyard grass in the paddy field; the blending of fluroxypyr-meptyl and the benzobicyclon shows a good prevention effect on the stephania japonica in the paddy field, and the combined action is an additive action; the mixing ratio of the fluroxypyr-meptyl to the benzobicyclon is 30+70, 45+35, 45+70, 60+35 and 60+70, the fluroxypyr-meptyl and the benzobicyclon show better control effect on the monochoria vaginalis in the paddy field, and the combined action is synergistic action; the mixture ratio of fluroxypyr-meptyl to the benzobicyclon is 30+70, 45+35, 45+70, 60+17.5, 60+35 and 60+70, the fluroxypyr-meptyl and the benzobicyclon show better control effect on the short arrowheads in the paddy field, and the combined action is synergistic action; the fluroxypyr meptyl and the benzobicyclon are mixed to form an additive effect on the special-shaped sedges in the paddy field; the blending of fluroxypyr-meptyl and benzobicyclon shows a good prevention effect on the irisquinone in the paddy field, and the combined action is an additive action.
The results of the indoor activity tests show that the blending of fluroxypyr-meptyl and the benzobicyclon has good indoor activity on common weeds in the paddy field, namely barnyard grass, moleplant seed, monochoria vaginalis, edible tulip, cyperus heterophylla and Iris lactuca.
Test of field drug effect
Example 10: and (3) field efficacy test of the weeding composition containing fluroxypyr meptyl.
The inventor carries out field pesticide effect tests of 30% fluroxypyr-meptyl-bicyclsulcotrione wettable powder (1:1), 30% fluroxypyr-meptyl-bicyclsulcotrione wettable powder (1:2), 30% fluroxypyr-meptyl-bicyclsulcotrione wettable powder (2:1) and 25% bicyclsulcotrione suspending agent for preventing and treating paddy field weeds in 2018, wherein the dosage of the field pesticide effect tests is 200g.a.i./hm2、200g.a.i./hm2、200g.a.i./hm2、300g.a.i./hm2The control effect of the pesticide on weeds in paddy fields and the safety of the pesticide on paddy rice are verified.
The test crop is rice, the control object is conventional weeds in the rice field, and the weeds are applied in the 2-5 leaf stage.
The test field has flat vigor, soil is loam, the fertility is moderate, and the pH value is 7.2. Blank control was set, 4 replicates per treatment, 20m per cell2The random block arrangement of different treatment cells in the experiment adopts a conventional spraying method.
The investigation method comprises the following steps: on the treatment day, recording the weed species of each plot, the growth period of main weeds, the growth period and coverage of rice and the like; 5d after treatment, observing the prevention condition by visual observation; the fresh weight of weeds was investigated 21d after the application.
The drug effect calculation method comprises the following steps:
the fresh matter control effect (%) - (the quality of the fresh weeds in the blank control area-the quality of the fresh weeds in the treatment area)/the quality of the fresh weeds in the blank control area multiplied by 100
And calculating the control effect according to the formula, and performing significance analysis by using a new repolarization method.
Crop investigation: observing whether the pesticide has phytotoxicity on the rice, recording the type and the degree of the phytotoxicity, and grading the phytotoxicity of each cell according to a phytotoxicity grading method;
level 1: the rice grows normally without any damage symptom;
and 2, stage: the rice has slight phytotoxicity which is less than 10 percent;
and 3, level: the rice can recover after medium phytotoxicity, and the yield is not influenced;
4, level: the rice has serious phytotoxicity and is difficult to recover, thereby causing the reduction of yield;
and 5, stage: the rice has serious phytotoxicity and can not be recovered, thereby causing obvious yield reduction or no yield.
Meanwhile, the phytotoxicity symptoms of the rice are accurately described, and the growth conditions of the rice under all conditions are recorded.
Results and analysis
According to field investigation, the main monocotyledon weeds in the paddy field comprise large crabgrass, barnyard grass, rice leersia hexandra, moleplant seeds and the like, and dicotyledons comprise monochoria vaginalis, rhizoma pleionis, eclipta prostrata and arthromyodynia. As shown in Table 4, the test results show that the 30% fluroxypyr-meptyl-bicyclsulcotrione wettable powder (1:1), the 30% fluroxypyr-meptyl-bicyclsulcotrione wettable powder (1:2) and the 30% fluroxypyr-meptyl-bicyclsulcotrione wettable powder (2:1) have the control effect on monocotyledons of more than 85% and dicotyledons of more than 90%, are superior to a control single-dose 25% bicyclsulcotrione suspending agent, and show better control effect.
TABLE 4 herbicidal composition containing fluroxypyr meptyl ester for paddy field weed control
TABLE 5 Total control Effect of herbicidal compositions containing fluroxypyr meptyl on weeds in Rice fields
Note: the control effect in the above table is the overall control effect, with capital letters representing the most significant level of 1% difference and lowercase letters representing the most significant level of 5% difference.
From table 5, the total control effect results of the herbicidal composition containing fluroxypyr-meptyl on paddy field weeds show that the control effect of 30% fluroxypyr-meptyl-bicyclosulfuron wettable powder (1:1), 30% fluroxypyr-meptyl-bicyclosulfuron wettable powder (1:2) and 30% fluroxypyr-meptyl-bicyclosulfuron wettable powder (2:1) on the total weeds of monocotyledons is 85.56%, 89.27% and 87.47% respectively, a new double polar error (DMRT) method is adopted by a biological statistical analysis method, and the compound medicament is superior to the control single-agent total weed control effect by 79.68% at the levels of 0.01 and 0.05 and has obvious difference; the control effect on the total grass of dicotyledonous plants is respectively 94.94%, 96.36% and 96.76%, which is 83.37% better than that of the control single-dose total grass, the compound medicament is better than the single-dose total grass, and the obvious difference exists between the 0.01 level and the 0.05 level.
Safety investigation: and (4) observing during the test period, wherein all the test agents are safe to the growth of rice and have no phytotoxicity phenomenon. Observed 21 days after the application, as can be seen from the following table 6, the rice in each cell grows normally without any damage symptom, and the safety grade is 1 grade, which indicates that each agent is safe to the rice.
TABLE 6 Rice safety situation record table
In conclusion, the composition adopts a compounding scheme of fluroxypyr-meptyl and benzobicyclon, the activity and the weeding effect are not simple superposition of the activities of all components, and compared with the existing single preparation, the composition has obvious biological activity and remarkable synergistic effect on plots where various monocotyledonous weeds and dicotyledonous weeds are mixed, can delay resistance, has little pesticide residue and good safety, and meets the safety requirement of pesticide preparations.
Claims (10)
1. The weeding composition containing the fluroxypyr-meptyl is characterized in that the effective ingredients of the weeding composition comprise an active ingredient A and an active ingredient B, wherein the active ingredient A is fluroxypyr-meptyl, and the active ingredient B is benzobicyclon.
2. A herbicidal composition according to claim 1, wherein the weight ratio of fluroxypyr-meptyl and mesotrione is from 1:50 to 50: 1.
3. A herbicidal composition according to claim 1, wherein the weight ratio of fluroxypyr-meptyl to mesotrione is from 1:20 to 15: 1.
4. A herbicidal composition according to claim 1, wherein the mass ratio of fluroxypyr-meptyl to mesotrione is 1:15 to 10:1,
preferably, the mass ratio is 1: 10-5: 1.
5. A herbicidal composition according to claim 1, wherein the fluroxypyr-meptyl and the benzobicyclon are present in the herbicidal composition in an amount of 5 to 90% by weight, preferably 10 to 60% by weight.
6. The herbicidal composition as claimed in claim 1, wherein the herbicidal composition is formulated in any one of the dosage forms using fluroxypyr meptyl ester and mesotrione as active ingredients and a pesticidally acceptable adjuvant.
7. A herbicidal composition according to claim 6, wherein the herbicidal composition is in the form of any one of a powder, a granule, a wettable powder, a water dispersible granule, a soluble granule, an emulsifiable concentrate, a suspension, an aqueous solution, an aqueous emulsion, a microemulsion, a soluble solution, a dispersible oil suspension;
preferably, the dosage form of the weeding composition is missible oil, suspending agent, granules, wettable powder, water dispersible granules, dispersible oil suspending agent and aqueous emulsion.
8. Use of the herbicidal composition according to any one of claims 1 to 7 for controlling unwanted vegetation.
9. Use of a herbicidal composition containing isooctyl fluroxypyr and mesotrione according to any one of claims 1 to 7 for controlling unwanted vegetation on the locus and/or foliage and/or stem of the unwanted vegetation;
preferably, the growing place of the unwanted plants is a paddy field.
10. Use of the herbicidal composition according to claim 8, for controlling unwanted vegetation, characterized in that the unwanted vegetation is monocotyledonous weeds and/or dicotyledonous weeds;
preferably, the monocotyledon weeds are one or more of crabgrass, barnyard grass, moleplant seed, rice leek, cyperus heterophyllus and Chinese iris, and the dicotyledon weeds are one or more of eclipta prostrata, monochoria vaginalis, short arrowhead, long-noded sedge and strange lettuce.
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104920368A (en) * | 2015-06-25 | 2015-09-23 | 江苏省农业科学院 | Pesticide composite comprising fluroxypyr and benzobicyclon and application of pesticide composite in prevention of lemnaceae plants |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104920368A (en) * | 2015-06-25 | 2015-09-23 | 江苏省农业科学院 | Pesticide composite comprising fluroxypyr and benzobicyclon and application of pesticide composite in prevention of lemnaceae plants |
Non-Patent Citations (4)
| Title |
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| 刘广文: "《现代农药剂型加工技术》", 31 January 2013, 化学工业出版社 * |
| 徐映明: "《题解除草剂应用技术》", 31 January 2004, 中国农业出版社 * |
| 李美等: "《中国麦田杂草防除技术原色图解》", 31 October 2018, 河南科学技术出版社 * |
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