CN112931519A - Dispersible oil suspending agent for preventing and treating insect pests and preparation method and application thereof - Google Patents
Dispersible oil suspending agent for preventing and treating insect pests and preparation method and application thereof Download PDFInfo
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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
- A01N43/90—Biocides, pest repellants or attractants, or plant growth regulators containing heterocyclic compounds having two or more relevant hetero rings, condensed among themselves or with a common carbocyclic ring system
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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
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/02—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing liquids as carriers, diluents or solvents
- A01N25/04—Dispersions, emulsions, suspoemulsions, suspension concentrates or gels
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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
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- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/08—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests containing solids as carriers or diluents
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- 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
- A01N51/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds having the sequences of atoms O—N—S, X—O—S, N—N—S, O—N—N or O-halogen, regardless of the number of bonds each atom has and with no atom of these sequences forming part of a heterocyclic ring
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Abstract
The invention relates to a dispersible oil suspending agent for preventing and treating insect pests, which comprises the following components; the effective component A, the effective component B and the chitin-protein bio-based material are added, unstable original medicine is loaded into a carrier, sanding preparation of the oil suspending agent is carried out, the added bio-based material can provide nutrient components for crops besides being used as the carrier, and a three-dimensional colloid structure is effectively formed, so that the effective components of the original medicine are highly dissolved and released, and the chitin-protein bio-based material is applied to control of insect pests of mites, lepidoptera, coleoptera, hemiptera, diptera, homoptera and ptera on the crops, overcomes the technical problems in the prior art, meets the market mechanization operation requirements, realizes scientific medication, and provides safer, more safe, and more environment-friendly green pesticides for promoting development of environment-friendly green pesticides, High-efficiency green novel pesticide.
Description
Technical Field
The invention belongs to the field of pesticide processing, relates to a pest control technology, and particularly relates to a dispersible oil suspending agent for controlling pests and a preparation method thereof.
Background
At present, the pesticide formulation in China is developing towards water-based, particle-packed, slow-release, high-efficiency, environment-friendly, multifunctional and labor-saving. Compared with missible oil, wettable powder and water dispersible granules, the oil suspending agent has obvious advantages for original drugs which are not easy to prepare into water suspending agents, has certain synergized property, can improve the permeability and the systemic property of pesticides, can prevent degradation when prepared into the oil suspending agent for the pesticides which are easy to hydrolyze in water, and is green, environment-friendly and pollution-free.
Although the oil suspending agent has obvious advantages, the preparation process has certain technical problems, for example, the key technology for preparing the oil suspending agent is the formation of a three-dimensional colloid structure, and the system is more difficult than that of a water suspending agent system. At present, the oil suspending agent in the market mainly takes herbicide as a main ingredient, and the dispersible oil suspending agent prepared from the original pesticide with relatively less pesticide and bactericide products, high content, low melting point and solubility in a dispersion medium has a certain technical barrier.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a dispersible oil suspending agent for preventing and treating insect pests and a preparation method thereof.
The technical problem to be solved by the invention is realized by adopting the following technical scheme:
a dispersible oil suspending agent for preventing and treating insect pests comprises the following components in percentage by mass:
a preparation method of a dispersible oil suspending agent for preventing and treating insect pests comprises the following specific steps:
crushing an effective component A and a chitin-protein bio-based material in an ultra-micro crusher to obtain a particle size D90 of less than or equal to 100 microns for later use;
secondly, putting an emulsifier, a dispersant, a tackifier, a stabilizer and a dispersion medium into a feeding kettle, uniformly shearing and stirring, adding an effective ingredient B, uniformly shearing and stirring, adding the crushed coarse powder, uniformly shearing and stirring, and performing sand grinding in a sand mill through a colloid mill;
sampling, detecting, and detecting to obtain the finished product after the grain diameter is qualified.
Moreover, the preparation method of the chitin-protein bio-based material comprises the following steps:
combining seaweed protein and cyclodextrin according to the ratio of 1: 1, mixing and reacting in proportion to obtain a glycosylation product of the seaweed protein for later use;
taking shrimp shells and crab shells, carrying out superfine grinding in a grinder, grinding to obtain a grain size D90 which is less than 50 mu m, adding 2% hydrochloric acid solution, soaking for 24h, removing filtrate, and drying to obtain chitin powder;
thirdly, adding the chitin powder after drying treatment in the step II into the seaweed protein glycosylation treatment product in the step I, and adding white carbon black into the superfine pulverizer for mixing treatment.
And the glycosylation product of the seaweed protein, the chitin powder and the white carbon black are respectively added in the mass percent of 1-50%: 1-49%: 1 to 5 percent.
Further, the active ingredient a includes: one or more of tolfenpyrad, acetamiprid, pyraclostrobin, pyriproxyfen and buprofezin; the effective component B comprises: one or more of spinetoram, dinotefuran, emamectin benzoate, pymetrozine, spirotetramat and flonicamid.
The emulsifier is one or any two or any combination of more than two of calcium dodecyl benzene sulfonate, castor oil polyoxyethylene ether series emulsifier, fatty alcohol polyoxyethylene ether, agricultural milk 700#, agricultural milk 2201, agricultural milk 1601#, span-60 # and tween-60 #; the dispersing agent is one or the combination of at least two of alkyl aryl polyoxyethylene ether phosphate, polycarboxylate, EO-PO block copolymer, lignosulfonate and alkyl naphthalene sulfonate.
The tackifier is one or the combination of more than two of white carbon black, organic bentonite, attapulgite, xanthan gum or magnesium aluminum silicate; the stabilizer is BHT, butylated hydroxyanisole BHA or D902; the dispersion medium is soybean oil, corn oil, castor oil, epoxidized soybean oil or methyl ester oil.
The dispersible oil suspending agent and the preparation method are applied to control of mites, lepidoptera, coleopteran, hemiptera, diptera, homoptera and thysanoptera on crops.
The invention has the advantages and positive effects that:
the carrier used in the method is chitin-protein bio-based material, has wide sources, is simple and easy to obtain, has good biodegradability, and can be used as a nutrient component to provide required nutrients for crops; meanwhile, a preparation method of the chitin-protein bio-based material is innovated, a three-dimensional space colloid structure is effectively formed, so that the active ingredients of the raw pesticide are highly dissolved and released, and the chitin-protein bio-based material is applied to pest control of mites, lepidoptera, coleoptera, hemiptera, diptera, homoptera and thysanoptera on crops, overcomes the technical problems in the prior art, meets the market mechanized operation requirements, realizes scientific medication, and provides a safer, efficient and green novel pesticide for promoting the development of environment-friendly green pesticides.
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FIG. 1 is a process flow diagram of the present invention.
Detailed Description
The present invention is further illustrated by the following specific examples, which are intended to be illustrative, not limiting and are not intended to limit the scope of the invention.
The invention aims to overcome the defects of the prior art, meet the requirements of market mechanized operation, realize scientific application and promote the development of environment-friendly green pesticides so as to provide a safer, more efficient and green novel pesticide. The insecticidal composition has the advantages of high suspension rate in water, good dispersibility, convenient mechanical application, simple and convenient preparation process, environmental protection, no pollution, obvious pesticide effect and certain synergistic effect, and can be effectively used for preventing and controlling mites, lepidoptera, coleoptera, hemiptera, diptera, homoptera, thysanoptera and other insect pests on crops.
A dispersible oil suspending agent for preventing and treating insect pests comprises the following components in percentage by mass:
a preparation method of dispersible oil suspending agent for preventing and treating insect pest is shown in figure 1, and the specific method comprises the following steps:
crushing an effective component A and a chitin-protein bio-based material in an ultra-micro crusher to obtain a particle size D90 of less than or equal to 100 microns for later use;
the method comprises the steps of mixing an emulsifier, a dispersant, a tackifier, a stabilizer and a dispersion medium in a feeding kettle, shearing and stirring uniformly, adding an effective ingredient B, shearing and stirring uniformly, and adding the crushed coarse powder obtained in the step
Sanding by a sanding machine;
sampling, detecting, and detecting to obtain the finished product after the grain diameter is qualified.
The preparation method of the chitin-protein bio-based material comprises the following steps:
combining seaweed protein and cyclodextrin according to the ratio of 1: 1, mixing and reacting in proportion to obtain a glycosylation product of the seaweed protein for later use;
taking shrimp shells and crab shells, carrying out superfine grinding in a grinder, grinding to obtain a grain size D90 which is less than 50 mu m, adding 2% hydrochloric acid solution, soaking for 24h, removing filtrate, and drying to obtain chitin powder;
thirdly, adding the chitin powder after drying treatment in the second step into the seaweed protein glycosylation treatment product in the first step, adding white carbon black into the seaweed protein glycosylation treatment product and mixing the mixture in an ultrafine grinder for later use, wherein the adding amounts of the chitin powder, the seaweed protein glycosylation treatment product and the white carbon black are 1-50%, 1-49% and 1-5% in percentage by mass respectively.
The effective component A comprises: one or more of tolfenpyrad, acetamiprid, pyraclostrobin, pyriproxyfen and buprofezin.
The effective component B comprises: one or more of spinetoram, dinotefuran, emamectin benzoate, pymetrozine, spirotetramat and flonicamid.
The emulsifier is one or any combination of two or more than two of calcium dodecyl benzene sulfonate, castor oil polyoxyethylene ether series emulsifier, fatty alcohol polyoxyethylene ether, agricultural milk No. 700, agricultural milk No. 2201, agricultural milk No. 1601, span-60 and Tween-60.
The dispersing agent is one or the combination of at least two of alkyl aryl polyoxyethylene ether phosphate, polycarboxylate, EO-PO block copolymer, lignosulfonate and alkyl naphthalene sulfonate.
The tackifier is one or the combination of more than two of white carbon black, organic bentonite, attapulgite, xanthan gum or magnesium aluminum silicate.
The stabilizer is BHT, Butyl Hydroxy Anisol (BHA) or D902.
The dispersion medium is soybean oil, corn oil, castor oil, epoxidized soybean oil or methyl ester oil.
Example 1
A dispersible oil suspension containing emamectin benzoate and pyriproxyfen comprises the following components in percentage by mass:
a preparation method of dispersible oil suspending agent containing emamectin benzoate and pyriproxyfen comprises the following steps:
1) pyriproxyfen and chitin-proteinThe bio-based material is crushed to D in an ultrafine crusher90Less than or equal to 100 mu m for standby;
2) weighing dispersing medium corn oil, emulsifier 1601#, castor oil polyoxyethylene ether series emulsifier, calcium dodecylbenzene sulfonate, dispersant alkyl aryl polyoxyethylene ether phosphate and lignosulfonate according to weight percentage, placing in a feeding kettle, and fully and uniformly stirring;
3) placing emamectin benzoate, Butyl Hydroxy Anisole (BHA) serving as a stabilizer, organic bentonite serving as a tackifier and attapulgite in the feeding kettle in the step 2), and uniformly stirring to obtain a mixed solution;
4) adding pyriproxyfen mother powder prepared in 1) into the mixed solution, shearing and stirring uniformly, placing in a sand mill for sanding, introducing condensed water, discharging after various indexes to be detected are qualified, and obtaining a finished product.
The dispersible oil suspension containing emamectin benzoate and pyriproxyfen is used for controlling mites, lepidoptera, coleopteran, hemiptera, diptera, homoptera, thysanoptera and other pests on crops, wherein the diptera comprises mosquitoes and flies.
Example 2
A dispersible oil suspension containing emamectin benzoate and pyriproxyfen comprises the following components in percentage by mass:
a preparation method of dispersible oil suspending agent containing emamectin benzoate and pyriproxyfen comprises the following steps:
1) pulverizing pyriproxyfen and chitin-protein bio-based material in an ultrafine pulverizer to obtain D90Less than or equal to 100 mu m for standby;
2) weighing dispersion medium soybean oil, emulsifier 2201#, fatty alcohol polyoxyethylene ether series emulsifier, tween 60#, calcium dodecylbenzene sulfonate, dispersant polycarboxylate and alkyl naphthalene sulfonate according to weight percentage, putting into a feeding kettle, and fully and uniformly stirring;
3) placing the emamectin benzoate, BHT, tackifier organobentonite and white carbon black in the feeding kettle in the step 2), and uniformly stirring to obtain a mixed solution;
4) adding pyriproxyfen mother powder prepared in 1) into the mixed solution, shearing and stirring uniformly, placing in a sand mill for sanding, introducing condensed water, discharging after various indexes to be detected are qualified, and obtaining a finished product.
The dispersible oil suspension containing emamectin benzoate and pyriproxyfen is used for preventing and controlling mites, lepidoptera, coleopteran, hemiptera, dipteran, homopteran, thysanoptera and other pests on crops, wherein the dipteran is mainly mosquitoes and flies.
Example 3
A dispersible oil suspension containing emamectin benzoate and pyriproxyfen comprises the following components in percentage by mass:
a preparation method of dispersible oil suspending agent containing emamectin benzoate and pyriproxyfen comprises the following steps:
1) pulverizing pyriproxyfen and chitin-protein bio-based material in an ultrafine pulverizer to obtain D90Less than or equal to 100 mu m for standby;
2) weighing dispersing medium methyl ester oil, emulsifier 2201#, fatty alcohol polyoxyethylene ether series emulsifier, span 60#, agricultural emulsion 700#, dispersant polycarboxylate and EO/PO block copolymer according to weight percentage, putting into a feeding kettle, and fully and uniformly stirring;
3) placing emamectin benzoate, D902, viscosity increaser magnesium aluminum silicate and xanthan gum in the feeding kettle in the step 2), and uniformly stirring to obtain a mixed solution;
4) adding pyriproxyfen mother powder prepared in 1) into the mixed solution, shearing and stirring uniformly, placing in a sand mill for sanding, introducing condensed water, discharging after various indexes to be detected are qualified, and obtaining a finished product.
The dispersible oil suspension containing emamectin benzoate and pyriproxyfen is used for preventing and controlling mites, lepidoptera, coleopteran, hemiptera, dipteran, homopteran, thysanoptera and other pests on crops, wherein the dipteran is mainly mosquitoes and flies.
Control effect of emamectin benzoate and pyriproxyfen dispersible oil suspending agent on cowpea pod borers
A total of 6 treatments were set for this experiment, 3 replicates, example 1 (5% emamectin benzoate + 15% pyriproxyfen dispersible oil suspension) in the present invention; example 2 (3% emamectin benzoate + 12% pyriproxyfen dispersible oil suspension); example 3 (10% emamectin benzoate + 20% pyriproxyfen dispersible oil suspension); a control medicament of 10 percent pyriproxyfen emulsifiable concentrate (Shanghai Sheng agricultural and biochemical products, Inc.); control agent 20% methyl-pyriproxyfen suspension (Shanghai agricultural and biochemical products, Inc.); and clear water as a blank control.
The test is carried out in the early stage of the emergence of the cowpea pod borers in the Paai county of Henan province, the pesticide application time is 7 months and 25 days in 2019, and no pesticide is applied in the test period. The experiment had 6 treatments, each treatment was repeated 3 times, the cells were randomly arranged, and the area of each cell was 20m2The sprayer adopts a knapsack electric sprayer to evenly spray 15kg of water in each barrel.
And (3) selecting 5 plants per point at 3 points per cell by adopting a fixed-point sampling investigation method, investigating the population base number before spraying, and investigating the population decline rate and the control effect 3d, 7d and 10d after spraying respectively.
The oral cavity decline rate (%) is (number of pre-drug insects-number of post-drug insects)/number of pre-drug insects × 100%
Control effect (%) - (reduction rate of population in treatment area-reduction rate of population in control area)/(reduction rate of population in 100-control area) × 100%
Control effect of different medicament treatment on cowpea pod borer
As can be seen from the table above, the control effects of the examples are obviously higher than those of the control medicament, and the control effect of the compound medicament is obviously higher than that of the single-component medicament. When the effective components are used in the same amount, the more the application amount is, the better the prevention and treatment effect is, and the longer the effective period is. The control effect of the dispersible oil suspending agent was significantly higher than that of the suspending agent, with the control effect of example 2 being the best.
Example 4
A dispersible oil suspending agent containing dinotefuran and pyriproxyfen comprises the following components in percentage by mass:
a preparation method of a dispersible oil suspending agent containing dinotefuran and pyriproxyfen comprises the following steps:
1) pulverizing pyriproxyfen and chitin-protein bio-based material in an ultrafine pulverizer to obtain D90Less than or equal to 100 mu m for standby;
2) weighing the dispersion medium methyl ester oil, the emulsifier 1601#, the fatty alcohol polyoxyethylene ether series emulsifier, calcium dodecyl benzene sulfonate, the dispersant alkyl aryl polyoxyethylene ether phosphate and the alkyl naphthalene sulfonate according to the weight percentage, placing the mixture into a feeding kettle, and fully and uniformly stirring the mixture;
3) putting dinotefuran, tackifier magnesium aluminum silicate and attapulgite in the feeding kettle in the step 2), and uniformly stirring to obtain a mixed solution;
4) adding pyriproxyfen mother powder prepared in 1) into the mixed solution, shearing and stirring uniformly, placing in a sand mill for sanding, introducing condensed water, discharging after various indexes to be detected are qualified, and obtaining a finished product.
The dispersible oil suspension containing dinotefuran and pyriproxyfen is used for controlling mites, lepidoptera, coleoptera, hemiptera, diptera, homoptera, thysanoptera and other pests on crops. The diptera are mainly mosquitoes and flies.
Example 5
A dispersible oil suspending agent containing dinotefuran and pyriproxyfen comprises the following components in percentage by mass:
a preparation method of a dispersible oil suspending agent containing dinotefuran and pyriproxyfen comprises the following steps:
1) pulverizing pyriproxyfen and chitin-protein bio-based material in an ultrafine pulverizer to obtain D90Less than or equal to 100 mu m for standby;
2) weighing dispersion medium soybean oil, emulsifier 2201#, castor oil polyoxyethylene ether series emulsifier, calcium dodecyl benzene sulfonate, tween 60#, dispersant polycarboxylate and lignosulfonate according to weight percentage, putting into a feeding kettle, and fully and uniformly stirring;
3) putting dinotefuran, tackifier organobentonite and white carbon black in the feeding kettle in the step 2), and uniformly stirring to obtain a mixed solution;
4) adding pyriproxyfen mother powder prepared in 1) into the mixed solution, shearing and stirring uniformly, placing in a sand mill for sanding, introducing condensed water, discharging after various indexes to be detected are qualified, and obtaining a finished product.
The dispersible oil suspension containing dinotefuran and pyriproxyfen is used for controlling mites, lepidoptera, coleoptera, hemiptera, diptera, homoptera, thysanoptera and other pests on crops. The diptera are mainly mosquitoes and flies.
Example 6
A dispersible oil suspending agent containing dinotefuran and pyriproxyfen comprises the following components in parts by mass:
a preparation method of a dispersible oil suspending agent containing dinotefuran and pyriproxyfen comprises the following steps:
1) pulverizing pyriproxyfen and chitin-protein bio-based material in an ultrafine pulverizer to obtain D90Less than or equal to 100 mu m for standby;
2) weighing dispersing medium methyl oleate, emulsifier 700#, fatty alcohol polyoxyethylene ether series emulsifier, span 60#, dispersing agent EO/PO block copolymer and polycarboxylate according to weight percentage, putting into a feeding kettle, and fully and uniformly stirring;
3) putting dinotefuran, tackifier xanthan gum and attapulgite in the feeding kettle in the step 2), and uniformly stirring to obtain a mixed solution;
4) adding pyriproxyfen mother powder prepared in 1) into the mixed solution, shearing and stirring uniformly, placing in a sand mill for sanding, introducing condensed water, discharging after various indexes to be detected are qualified, and obtaining a finished product.
The dispersible oil suspension containing dinotefuran and pyriproxyfen is used for controlling mites, lepidoptera, coleoptera, hemiptera, diptera, homoptera, thysanoptera and other pests on crops. The diptera are mainly mosquitoes and flies.
Pesticide effect test of pyriproxyfen and dinotefuran dispersible oil suspending agent for preventing and treating watermelon aphids
A total of 7 treatments were set for this experiment, which was repeated 3 times, example 4 (10% pyriproxyfen + 20% dinotefuran dispersible oil suspension) of the present invention; example 5 (5% pyriproxyfen + 15% dinotefuran dispersible oil suspension); example 6 (5% pyriproxyfen + 20% dinotefuran dispersible oil suspension); a contrast medicament of 30% pyriproxyfen dinotefuran soluble solution (Shenzhen nopaxin agrichemical Co., Ltd.); a reference medicament, namely 25% dinotefuran dispersible oil suspending agent (Jiangxi red soil chemical Co., Ltd.); a control medicament of 100g/L pyriproxyfen emulsifiable concentrate (Shanghai Sheng agricultural and chemical products, Inc.); and clear water as a control.
The test is carried out in WangYingcun of Linquan county in Anhui province, the pesticide application is started in the first prosperous period of watermelon aphid, the pesticide application time is 7 months and 15 days in 2020, and no pesticide is applied in the test period. The test was repeated 3 times for a total of 7 treatments, and the test results were averaged over 3 replicates. Cells are randomly arranged with an area of 20m per cell2The sprayer adopts a knapsack electric sprayer to evenly spray, and each barrel of water is 30 jin. Selecting 3 points and 5 plants per point in each cell by fixed point sampling investigation method (the population base number of selected insects is kept consistent or consistent as much as possibleNear area), the population base number is investigated before spraying, and the population decline rate and the control effect are investigated 3d, 7d and 14d after spraying respectively.
The oral cavity decline rate (%) is (number of pre-drug insects-number of post-drug insects)/number of pre-drug insects × 100%
Control effect (%) - (reduction rate of population in treatment area-reduction rate of population in control area)/(reduction rate of population in 100-control area) × 100%
Prevention and treatment effects of different medicament treatments on watermelon aphids
As can be seen from the above table, the control effect of the medicament of the embodiment is obviously higher than that of the control medicament, the control effect is over 93 percent, and the control effect of the compound medicament is obviously higher than that of a single-component preparation; when the contents of the effective components are consistent, the more the application amount is, the better the prevention and treatment effect is; the control effect of the embodiment 5 is best, the quick action is good, and the lasting period is long.
Although the embodiments of the present invention have been disclosed for illustrative purposes, those skilled in the art will appreciate that: various substitutions, changes and modifications are possible without departing from the spirit and scope of the invention and the appended claims, and therefore the scope of the invention is not limited to the embodiments disclosed.
Claims (8)
1. A dispersible oil suspending agent for preventing and treating insect pests is characterized in that: the mass percentage of the components is as follows:
2. a preparation method of a dispersible oil suspending agent for preventing and treating insect pests is characterized by comprising the following steps: the method comprises the following specific steps:
crushing an effective component A and a chitin-protein bio-based material in an ultra-micro crusher to obtain a particle size D90 of less than or equal to 100 microns for later use;
secondly, putting an emulsifier, a dispersant, a tackifier, a stabilizer and a dispersion medium into a feeding kettle, uniformly shearing and stirring, adding an effective ingredient B, uniformly shearing and stirring, adding the crushed coarse powder, uniformly shearing and stirring, and performing sand grinding in a sand mill through a colloid mill;
sampling, detecting, and detecting to obtain the finished product after the grain diameter is qualified.
3. The method for preparing a dispersible oil suspension concentrate for controlling insect pests according to claim 2, wherein the method comprises the following steps: the preparation method of the chitin-protein bio-based material comprises the following steps:
combining seaweed protein and cyclodextrin according to the ratio of 1: 1, mixing and reacting in proportion to obtain a glycosylation product of the seaweed protein for later use;
taking shrimp shells and crab shells, carrying out superfine grinding in a grinder, grinding to obtain a grain size D90 which is less than 50 mu m, adding 2% hydrochloric acid solution, soaking for 24h, removing filtrate, and drying to obtain chitin powder;
thirdly, adding the chitin powder after drying treatment in the step II into the seaweed protein glycosylation treatment product in the step I, and adding white carbon black into the superfine pulverizer for mixing treatment.
4. The method for preparing a dispersible oil suspension concentrate for controlling insect pests according to claim 3, wherein the method comprises the following steps: the glycosylation product of the seaweed protein, the chitin powder and the white carbon black are added in the mass percent of 1-50% respectively: 1-49%: 1 to 5 percent.
5. The dispersible oil suspension concentrate for controlling insect pests and the preparation method thereof according to claim 1 or 2, wherein: the effective component A comprises: one or more of tolfenpyrad, acetamiprid, pyraclostrobin, pyriproxyfen and buprofezin; the effective component B comprises: one or more of spinetoram, dinotefuran, emamectin benzoate, pymetrozine, spirotetramat and flonicamid.
6. The dispersible oil suspension concentrate for controlling insect pests and the preparation method thereof according to claim 1 or 2, wherein: the emulsifier is one or any two or any combination of more than two of calcium dodecyl benzene sulfonate, castor oil polyoxyethylene ether series emulsifier, fatty alcohol polyoxyethylene ether, agricultural milk No. 700, agricultural milk No. 2201, agricultural milk No. 1601, span-60 and Tween-60; the dispersing agent is one or the combination of at least two of alkyl aryl polyoxyethylene ether phosphate, polycarboxylate, EO-PO block copolymer, lignosulfonate and alkyl naphthalene sulfonate.
7. The dispersible oil suspension concentrate for controlling insect pests and the preparation method thereof according to claim 1 or 2, wherein: the tackifier is one or the combination of more than two of white carbon black, organic bentonite, attapulgite, xanthan gum or magnesium aluminum silicate; the stabilizer is BHT, butylated hydroxyanisole BHA or D902; the dispersion medium is soybean oil, corn oil, castor oil, epoxidized soybean oil or methyl ester oil.
8. The application of the dispersible oil suspending agent for preventing and treating insect pests is characterized in that: the dispersible oil suspending agent and the preparation method are applied to control of mites, lepidoptera, coleopteran, hemiptera, diptera, homoptera and thysanoptera on crops.
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