CN113115783A - Preparation method of curing agent for pine wood nematode disease - Google Patents
Preparation method of curing agent for pine wood nematode disease Download PDFInfo
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- CN113115783A CN113115783A CN202110398449.8A CN202110398449A CN113115783A CN 113115783 A CN113115783 A CN 113115783A CN 202110398449 A CN202110398449 A CN 202110398449A CN 113115783 A CN113115783 A CN 113115783A
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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
- 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
Abstract
The invention discloses a preparation method of a pine wood nematode disease treating agent, which comprises the following components: 0.5 to 3.0 percent of emamectin benzoate, 10 to 20 percent of thiamethoxam, 10 to 20 percent of No. 0 promoter, 5.0 to 15.0 percent of polymethyl acrylate, 3.0 to 8.0 percent of ethyl acetate, 5.0 to 15.0 percent of N-methyl pyrrolidone, 1.0 to 5.0 percent of polyoxyethylene fatty alcohol ether, 0.5 to 3.0 percent of glycol, 0.1 to 0.5 percent of organic silicone, 0.1 to 0.8 percent of synergistic ether and water, and the total weight is 100 percent. The invention has the advantages that the combination of emamectin benzoate, thiamethoxam and No. 0 auxiliary agent has the best thread killing effect, the No. 0 auxiliary agent can be used for quickly displacing and permeating water in pine bodies into the combined agent, the quick nematode killing, combined synergistic effect and high efficiency of the combined agent entering the pine bodies are realized, the treatment effect on pine wood nematode diseases of the pine trees is nearly 90%, the prevention and treatment spectrum is expanded, and the unit usage amount of pesticides is reduced.
Description
Technical Field
The invention relates to a pine wood nematode disease treating agent, in particular to a preparation method of the pine wood nematode disease treating agent, belonging to the technical field of pesticides.
Background
The pine wood nematode disease is a destructive disease of pine trees, is an external invasive organism causing the most serious loss in forestry history, belongs to a major ecological disaster, causes direct economic loss and ecological service value as high as one thousand billion yuan due to accumulation of the pine trees with the loss of the pine wood nematode disease, causes irreparable loss to pine forests in places, has the characteristic of hidden damage due to the pine wood nematode disease, has slow chemical control research on the pine wood nematode disease, does not have very effective control measures at present, in recent years, researchers screen out a batch of varieties with potential for controlling the pine wood nematode disease in various other pest control medicaments, such as imidacloprid, fosthiazate, thiamethoxam, emamectin benzoate, Loufida and the like, and according to the control test result of the pine wood nematode disease, the nematicide has a certain killing effect on the pine wood nematode in the pine trees, and other markets mainly use fosthiazate and abamectin for controlling the pine wood nematode at present, the dosage form is single, the pesticide residue is serious, the fosthiazate belongs to an organic nematicide, the action mode of the nematicide is to inhibit the harm of the pine wood nematode by the synthesis of the ethylcholine acetyltransferase of the pine wood nematode, however, in the process of applying the preparation, the soil treatment for the fosthiazate is more, so the utilization degree of the pesticide is limited, and the pesticide residue is serious.
According to Chinese patents CN201210267789.8 and CN105494423, an insecticide composition containing fosthiazate and thiamethoxam is disclosed, but the crop objects of the composition are wheat suntan worms, cotton suntan worms, vegetable yellow flea beetles and the like, and the prevention and treatment of root knot nematodes are researched, so that the insecticide has obvious distinguishing effects and synergistic effects on different kinds of pests.
Disclosure of Invention
The present invention has been made in an effort to solve the problems of limited use of pesticides and serious pesticide residue caused by the use of fosthiazate in soil treatment during application of preparations proposed in the background art.
In order to achieve the purpose, the invention provides the following technical scheme: the pine wood nematode disease treating agent comprises the following components: 0.5 to 3.0 percent of emamectin benzoate, 10 to 20 percent of thiamethoxam, 10 to 20 percent of No. 0 promoter, 5.0 to 15.0 percent of polymethyl acrylate, 3.0 to 8.0 percent of ethyl acetate, 5.0 to 15.0 percent of N-methyl pyrrolidone, 1.0 to 5.0 percent of polyoxyethylene fatty alcohol ether, 0.5 to 3.0 percent of glycol, 0.1 to 0.5 percent of organic silicone, 0.1 to 0.8 percent of synergistic ether and water, and the total weight is 100 percent.
As a preferable technical scheme, the weight ratio of the emamectin benzoate to the thiamethoxam plus 0 auxiliary agent is 20:1-1:20, and the 0 auxiliary agent is 10% -20%.
As a preferred technical scheme of the invention, the composition of emamectin benzoate, thiamethoxam and auxiliary agent No. 0 is added with a wetting dispersant and auxiliary materials to prepare microemulsion;
as a preferred technical scheme of the invention, the wetting dispersant is one or more of Tween 80, polymethyl acrylate, polyoxyethylene fatty alcohol ether, styryl phenol polyoxyethylene ether and sodium dodecyl benzene sulfonate.
As a preferable technical scheme of the invention, the auxiliary material is one or more of ethyl acetate, N-methyl pyrrolidone, glycol, aromatic solvent oil No. 150, DMF (dimethyl methyl ester amine), cyclohexyl ether, organic silicone, synergistic ether and water.
As a preferable technical scheme of the invention, the method comprises the following steps:
s1: weighing 0.5-3.0% of emamectin benzoate, 10-20% of thiamethoxam, 10-20% of No. 0 auxiliary agent, 5.0-15.0% of polymethyl acrylate and 3.0-8.0% of ethyl acetate; 5.0 to 15.0 percent of N-methyl pyrrolidone, 1.0 to 5.0 percent of polyoxyethylene fatty alcohol ether, 0.5 to 3.0 percent of glycol, 0.1 to 0.5 percent of organic silicone, 0.1 to 0.8 percent of synergistic ether, and the balance of water to 100 percent of weight portion;
s2: 0.5 to 3.0 percent of emamectin benzoate, 10 to 20 percent of thiamethoxam, 10 to 20 percent of No. 0 auxiliary agent, 5.0 to 15.0 percent of polymethyl acrylate and 3.0 to 8.0 percent of ethyl acetate; dissolving 5.0-15.0% of N-methyl pyrrolidone, 1.0-5.0% of polyoxyethylene fatty alcohol ether, 0.5-3.0% of glycol, 0.1-0.5% of organic silicone and 0.1-0.8% of synergistic ether in a solvent;
s3: in the dissolving process, stirring, and adding an emulsifier and a stabilizer; finally, slowly heating the rest of water and stirring to prepare the pine wood nematode disease treating agent;
as a preferable technical scheme of the invention, the stirring speed in the step S3 is 550r/min-1000 r/min.
Compared with the prior art, the invention has the beneficial effects that:
according to the preparation method of the pine wood nematode disease curing agent, the thread killing effect is optimal through the combination of the emamectin benzoate, the thiamethoxam and the No. 0 auxiliary agent, the water in the pine body can be quickly replaced and infiltrated into the combined agent through the No. 0 auxiliary agent, the quick nematode killing, combined synergistic effect and efficient effect of the combined agent entering the pine body are realized, the prevention and control spectrum is expanded, and the unit usage amount of pesticides is reduced.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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 invention provides a technical scheme of a preparation method of a curing agent for pine wood nematode disease, which comprises the following steps: the treatment agent for the pine wood nematode disease comprises the following components: 0.5 to 3.0 percent of emamectin benzoate, 10 to 20 percent of thiamethoxam, 10 to 20 percent of No. 0 promoter, 5.0 to 15.0 percent of polymethyl acrylate, 3.0 to 8.0 percent of ethyl acetate, 5.0 to 15.0 percent of N-methyl pyrrolidone, 1.0 to 5.0 percent of polyoxyethylene fatty alcohol ether, 0.5 to 3.0 percent of glycol, 0.1 to 0.5 percent of organic silicone, 0.1 to 0.8 percent of synergistic ether and water, and the total weight is 100 percent.
The weight ratio of emamectin benzoate to thiamethoxam plus 0 auxiliary agent is 20:1-1:20, and the 0 auxiliary agent is 10-20%.
Adding wetting dispersant and auxiliary materials into the composition of emamectin benzoate, thiamethoxam and No. 0 auxiliary agent to prepare microemulsion;
the wetting dispersant is one or more of tween 80, polymethyl acrylate, polyoxyethylene fatty alcohol ether, styryl phenol polyoxyethylene ether and sodium dodecyl benzene sulfonate.
The adjuvants are one or more of ethyl acetate, N-methylpyrrolidone, ethylene glycol, aromatic solvent oil No. 150, DMF (dimethyl methyl amine), cyclohexyl ether, organic silicone, synergistic ether and water.
Example 1, a method for producing a treatment agent for pine wilt disease:
weighing 0.5-3.0% of emamectin benzoate, 10-20% of thiamethoxam, 10-20% of No. 0 auxiliary agent, 5.0-15.0% of polymethyl acrylate and 3.0-8.0% of ethyl acetate; 5.0 to 15.0 percent of N-methyl pyrrolidone, 1.0 to 5.0 percent of polyoxyethylene fatty alcohol ether, 0.5 to 3.0 percent of glycol, 0.1 to 0.5 percent of organic silicone, 0.1 to 0.8 percent of synergistic ether, and the balance of water to 100 percent of weight. The raw materials are dissolved in a solvent, then an emulsifier, a stabilizer and the like are added while stirring, and finally the rest of the raw materials are slowly added into water and stirred to prepare the uniform and transparent microemulsion of emamectin benzoate, thiamethoxam and No. 0 auxiliary agent.
Example 2 combination of indoor virulence determination and forest testing
The test method comprises selecting 3 mu of pine forest as test area, selecting 9 sample pine trees for each mu of pine forest, inoculating nematode of 6000 heads per tree (containing 3CK strain outside the test area), performing drug efficacy control test 1 month later, spraying drug on all pine trees in each mu of forest land, sampling each treatment three days before spraying, taking sample three times, chopping the sample back to indoor to obtain 2-3mm square stem with length of 30-40mm, placing in a multifunctional combined nematode separator, separating nematodes with sterile purified water for 15-18h, collecting nematodes, microscopic examining the survival conditions of nematodes in each sample, recording the survival and death rate of the pine nematodes in each sample, respectively examining the survival and death of the pine nematodes at different time after treatment, and determining that the pine nematodes are dead (generally not separated), the live insects are the ones in the bending and creeping state. Calculating the mortality and correcting the mortality, and revisiting the test area at the later stage;
calculating corrected mortality according to survey data, calculating co-toxicity coefficient (CTC value) of the mixture by Sunweier method with reference to NY/T1154.1-2006, and if the control mortality is 25%, not correcting; correcting the control mortality rate between 5% and 20%, performing redo test, taking the logarithmic value of the concentration (mg/L) as an independent variable X and the corrected mortality rate value as a dependent variable y, respectively establishing a toxicity regression equation, calculating the co-toxicity coefficients of LC50, LC90 and the mixture thereof of a single agent and each mixing ratio by adopting DPS software, and comparing the synergy conditions;
the experimental design comprises the steps of determining the effective lethal concentration ranges of emamectin benzoate, thiamethoxam and a mixture of the emamectin benzoate and thiamethoxam in different proportions through a preparation test;
the toxicity of the emamectin benzoate and thiamethoxam compound plus No. 0 auxiliary agent on the pine wood nematode is measured;
medicament formulation screening test:
test drugs: adding No. 0 auxiliary agent into different formulas of imidacloprid, fosthiazate, thiamethoxam, emamectin benzoate, Lofuda and the like;
② test objects: selecting a certain number of pines to carry out artificial inoculation in advance, inoculating 5000 nematodes per plant, carrying out spray treatment by using a pine wood nematode disease treatment formula medicament after the nematodes are inoculated for one month, investigating the effect after the treatment for two months, setting 9 concentrations for each formula, repeating the treatment for each concentration for 3 times, and setting a control strain CK for repeating for 3 times;
the test method comprises the following processes: firstly, inoculating, spraying the medicament at intervals of one month, and separating sampling nematodes at intervals of 24 hours; carrying out microscopic detection at intervals of 15-18 hours;
fourthly, the results of the disease test of the inoculated pine trees treated by different formulas are as follows: the result shows that the thread killing rate in the pine sample treated by the formula I, namely 20:1-1:20 and the No. 0 auxiliary agent reaches 100%, the thread killing effect is obvious, and the thread killing effect is obviously superior to that of other formulas.
The method for calculating the treatment effect of the treatment agent for the pine wood nematode disease comprises the following steps: the treatment effect (%) was calculated as control IP-treatment IP/control IP х 100, IP being the index of susceptibility of the test pine. And (3) carrying out IP inspection, namely grading the incidence symptom grade of the pine trees, namely grading the incidence index IP (grade 0-4) of the pine trees, wherein the incidence degree is increased gradually, the grade 0 represents no incidence, the grade 1 represents that about 10% of branches and leaves are browned, the grade 2 represents that 30-40% of branches and leaves are browned, the grade 3 represents that more than 50% of branches and leaves are browned, and the grade 4 represents that the whole pine tree is dead.
The results of the drug gradient test are shown in table one:
the test result in the table I shows that the single agent of emamectin benzoate A, the single agent of thiamethoxam B and the mixed agent of emamectin benzoate and thiamethoxam M have the average curing effects of 53.04%, 45.50% and 77.29% respectively in the auxiliary agent gradient test area, so that the mixed agent shows obvious synergistic effect, and when the ratio of emamectin benzoate to thiamethoxam plus the auxiliary agent 0 is 20:1-1:20 and the auxiliary agent 0 is added, the synergistic effect is more obvious;
example 3: pesticide effect experiment for preventing and treating pine wood nematode by pesticide composition
Setting an experiment I, II area with 10.0 mu of area, wherein the soil type is mountain forest soil and 20-year-old masson pine, the management and growth level is general, and the area of the experiment III area is 30.0 mu, the soil type is mountain forest soil and 20-year-old masson pine, the management and growth level is general;
the using time is that after pine trees are inoculated with nematodes for 28 days, the external connection of the test area is compared with the quantity of the same nematodes;
the application method comprises the following steps of (1) spraying the tree crowns and the tree trunks by adopting a ground spraying method in tests I and II, and spraying pine forest by adopting an unmanned aerial vehicle spraying method in test III;
the experimental results are as follows: the three experimental areas are set, 5000 nematodes are artificially inoculated on sample pine trees in each experimental area, the pine trees are inoculated with the treatment agent for treating the pine wilt disease in a month, the combined spraying treatment is carried out on the pine trees after the nematodes are inoculated, the investigation shows that most of the pine trees to be tested are healthy after the pine trees are treated for two months, the disease index is lower, the treatment effects of the three experimental areas are calculated to respectively reach 75.84%, 66.75% and 66.65%, the treatment effects of the three experimental areas sprayed with the treatment agent for treating the pine wilt disease by the unmanned aerial vehicle respectively reach 84.74%, 57.49% and 36.51%, and the treatment effects of the treatment agent sprayed by the unmanned aerial vehicle are compared as shown in the second table:
the test also finds that although some tested pines have different disease-sensitive symptoms of 1-3 levels, the control pine which is not treated by the treatment agent basically suffers from diseases and dies, the disease-sensitive index is 3-4, the test shows that the treatment of the treatment agent for the pine wood nematode disease obtains obvious line killing and treatment effects, and the efficacy test proves that the treatment agent for the pine wood nematode disease combines, so that the prevention spectrum is expanded, the unit usage amount of pesticide is reduced, and the combined synergy and high-efficiency effect of the combined agent entering the pine body are realized;
in conclusion, the experimental treatment agent for the pine wood nematode disease has an obvious prevention and treatment effect on the pine wood nematode disease, the treatment effect of the pine wood nematode disease is nearly 90%, the experimental pine growth is not affected, large-area demonstration and popularization can be carried out, the recommended dosage is 250-300 g/mu, and the application method can be used alternately with other treatment agents for the pine wood nematode disease with different action mechanisms and application modes, so that the generation of drug resistance of pests is delayed.
Claims (7)
1. The treatment agent for the pine wood nematode disease is characterized by comprising the following components in parts by weight: 0.5 to 3.0 percent of emamectin benzoate, 10 to 20 percent of thiamethoxam, 10 to 20 percent of No. 0 promoter, 5.0 to 15.0 percent of polymethyl acrylate, 3.0 to 8.0 percent of ethyl acetate, 5.0 to 15.0 percent of N-methyl pyrrolidone, 1.0 to 5.0 percent of polyoxyethylene fatty alcohol ether, 0.5 to 3.0 percent of glycol, 0.1 to 0.5 percent of organic silicone, 0.1 to 0.8 percent of synergistic ether and water, and the total weight is 100 percent.
2. The bursaphelenchus xylophilus disease treatment agent according to claim 1, wherein: the weight ratio of the emamectin benzoate to the thiamethoxam plus the No. 0 auxiliary agent is 20:1-1:20, and the addition of the No. 0 auxiliary agent is 10% -20%.
3. The bursaphelenchus xylophilus disease treatment agent according to claim 2, wherein: the emamectin benzoate, the thiamethoxam and the auxiliary agent No. 0 are added with a wetting dispersant and auxiliary materials to prepare the microemulsion.
4. The bursaphelenchus xylophilus disease treatment agent according to claim 3, wherein: the wetting dispersant is one or more of tween 80, polymethyl acrylate, polyoxyethylene fatty alcohol ether, styryl phenol polyoxyethylene ether and sodium dodecyl benzene sulfonate.
5. The bursaphelenchus xylophilus disease treatment agent according to claim 3, wherein: the auxiliary materials are one or more of ethyl acetate, N-methyl pyrrolidone, glycol, aromatic solvent oil No. 150, DMF (dimethyl methyl amine), cyclohexyl ether, organic silicone, synergistic ether and water.
6. The preparation method of the pine wood nematode disease curing agent is characterized by comprising the following steps: the bursaphelenchus xylophilus disease treatment agent according to any one of claims 1 to 5, comprising the steps of:
s1: weighing 0.5-3.0% of emamectin benzoate, 10-20% of thiamethoxam, 10-20% of No. 0 auxiliary agent, 5.0-15.0% of polymethyl acrylate and 3.0-8.0% of ethyl acetate; 5.0 to 15.0 percent of N-methyl pyrrolidone, 1.0 to 5.0 percent of polyoxyethylene fatty alcohol ether, 0.5 to 3.0 percent of glycol, 0.1 to 0.5 percent of organic silicone, 0.1 to 0.8 percent of synergistic ether, and the balance of water to 100 percent of weight portion;
s2: 0.5 to 3.0 percent of emamectin benzoate, 10 to 20 percent of thiamethoxam, 10 to 20 percent of No. 0 auxiliary agent, 5.0 to 15.0 percent of polymethyl acrylate and 3.0 to 8.0 percent of ethyl acetate; dissolving 5.0-15.0% of N-methyl pyrrolidone, 1.0-5.0% of polyoxyethylene fatty alcohol ether, 0.5-3.0% of glycol, 0.1-0.5% of organic silicone and 0.1-0.8% of synergistic ether in a solvent;
s3: in the dissolving process, stirring, and adding an emulsifier and a stabilizer; and finally, slowly heating the rest of water and stirring to prepare the pine wood nematode disease treating agent.
7. The method for producing the treatment agent for pine wilt disease according to claim 6, characterized in that: the stirring speed in the step S3 is 550r/min-1000 r/min.
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| CN114586799A (en) * | 2022-03-25 | 2022-06-07 | 南京生兴有害生物防治技术股份有限公司 | Pine wood nematode disease treating agent and preparation method thereof |
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