CN111406756A

CN111406756A - Compound insecticide

Info

Publication number: CN111406756A
Application number: CN201910006335.7A
Authority: CN
Inventors: 杨会营; 刘晓娇
Original assignee: Yanhua Yoloo Laoting Biotechnology Co ltd
Current assignee: Yanhua Yoloo Laoting Biotechnology Co ltd
Priority date: 2019-01-04
Filing date: 2019-01-04
Publication date: 2020-07-14

Abstract

The invention relates to a compound insecticide, which contains two active components of dicyclopropyl tetramethrin and chlorpyrifos. The compound pesticide has good control effect on rice planthopper. The insecticidal spectrum is enlarged while the dosage is reduced, the labor cost is reduced, the pollution to the environment is reduced, and the drug resistance is not easy to generate.

Description

Compound insecticide

Technical Field

The invention belongs to the field of pesticides, and particularly relates to a compounded insecticide of propiconazole and chlorpyrifos.

Background

The afidopyropen is a propylene compound found in biological fermentation products, is a brand-new pesticide for preventing and treating piercing-sucking mouthpart pests, and has the characteristics of quick response, high efficiency, broad spectrum and the like. The action mechanism of the propiconazole is different from that of a conventional insecticide, and the propiconazole plays a role by interfering the regulation and control of an insect vanillic acid transient receptor channel complex, so that the feeding and other behaviors of insects are interfered, the insects are starved and die, the feeding of the insects can be quickly inhibited, and the virus diseases transmitted by insect mediators are effectively reduced; has excellent insecticidal (aphid, whitefly and the like) effect; the lasting period is long; effective against a variety of insect states of pests (ineffective against eggs). Although the dicyclopropionate can stop feeding within hours after application, the knockdown effect is slow. The product has long lasting period, and the lasting effect on aphids can last for 21 days. The dicyclopropyl is effective on both imagoes and larvae, but the drug is recommended to be applied in the larval stage, so that the control effect is better. The dicyclopropyl tetramat can be used for economic crops, field crops, ornamental plants and the like, and can effectively prevent and control piercing-sucking and sucking mouthparts pests, such as aphids, whiteflies, psyllids, scale insects, mealybugs, leafhoppers and the like. The fertilizer can be used for treating leaf surfaces, seeds or soil.

Chlorpyrifos (chlorpyrifos), also called chlorpyrifos, is an excellent organophosphorus insecticide widely used at present. The product has effects of stomach poisoning, contact poisoning and fumigating, and has good control effect on various chewing and piercing-sucking mouthpart pests on rice, wheat, cotton, fruit trees, vegetables and tea trees. Compared with the conventional pesticide, the pesticide has low toxicity, is safe to natural enemies, has a wide insecticidal spectrum, is easy to combine organic matters in soil, has a special effect on underground pests, and has a lasting period of more than 30 days.

As farmland pests cause great loss to crop production every year, and considering that the long-term use of a single variety of pesticide easily promotes the pests to generate resistance and causes greater pollution to the environment, field experiments show that the existing pesticide is mixed with another pesticide with different action mechanisms, the resistance generation can be delayed, the pesticide effect and the residual period can be improved, the using amount is reduced, and the cost is reduced, so that the composition of the propiconazole and the chlorpyrifos is adopted, the insecticidal effect is improved, the insecticidal spectrum is enlarged, the environmental pollution is reduced, and the pesticide application cost is reduced.

Disclosure of Invention

The invention aims to provide a compound insecticide which has high efficiency, low toxicity, long lasting effect, high quick action and environmental protection. In particular to a pesticide preparation taking dicyclopropyl tetramethrin and chlorpyrifos as effective components.

In the compound insecticide, the weight ratio of the dicyclopropyl tetramycin to the chlorpyrifos is 1: 50-50: 1, and the preferable weight ratio is 1: 30-30: 1, more preferably in a weight ratio of 1: 10-10: 1.

the compound pesticide can be prepared into dosage forms of the invention, including wettable powder, water dispersible granules, suspending agents, suspoemulsion, microemulsion and microcapsule suspending agents, by matching with auxiliary agents known to persons skilled in the art and by methods known to persons skilled in the art.

The invention has the advantages and beneficial effects of wide insecticidal range of ①, low toxicity of ②, quick action, lasting effect, no residue of ③, no pollution and environmental safety, and the ④ uses a compound preparation, and the two effective components have synergistic effect and lower dosage than the single use, thereby improving the insecticidal effect of the effective components, increasing the safety and reducing the environmental pollution.

The rice planthopper belongs to a Delphacidae pest of Homoptera (Homoptera) of Insecta, common name of Euglena, the piercing and sucking plant juice is used for injuring crops such as rice, common types of the rice are brown planthopper (Nilaparvata lugens), white-backed planthopper (Sogatella furcifera) and Laodelphax striatellus (L aodelphax striatellus), and the rice planthopper is harmful to rice, except that the juice is directly pierced and sucked, the growth is blocked, the rice cluster is withered in serious cases, even the dead straw of the whole field is fallen down, the plant is pierced by spawning, the conduction tissue is damaged, the transportation of nutrient substances is prevented, virus diseases are spread, and great loss is caused.

The applicant firstly carries out the research of formula screening on the dicentrazone and the chlorpyrifos, and determines the indoor bioassay object as the brown planthopper according to the action characteristics of the two components, and the specific experimental conditions and results are as follows:

the indoor bioassay method comprises the steps of adopting a capillary micro-dropping method, enabling the volume of a capillary micro-dropping device to be 1.0 mu L, dropping liquid medicine on the back of the brown plant hoppers head by using the micro-dropping device, processing about 100 brown plant hoppers at each concentration, putting the treated brown plant hoppers into an insect cage, putting rice in the cage for feeding, dropping 100 larvae with acetone as a control, putting the treated brown plant hoppers into a feeding chamber, checking the death rate after 48 hours, statistically processing the data by using SPSS software, calculating the lethal medium concentration, and calculating the co-toxicity coefficient by using a Sunpei method.

The joint virulence of the mixed preparation is expressed by adopting a Sunweier cotoxicity coefficient method:

the theoretical virulence index TTI of the compound formulation is ∑ (the virulence index ATI × of a drug is the percentage of the active ingredient in the compound).

The CTC is synergistic when the CTC is more than 120, antagonistic when the CTC is less than 80, and additive when the CTC is 80-120.

TABLE 1 virulence test results for Nilaparvata lugens with different ratios

The analysis of the results shows that when the dicentrazon methyl and the chlorpyrifos are compounded according to different proportions, the cotoxicity coefficient of all the compound formulas is more than 120, which indicates that the two effective components can have good synergistic action after being compounded.

The following specific examples are intended to illustrate the invention in further detail, but the invention is by no means limited to these examples. The percentages in the formula are weight percentages.

Example one: 25.5% dicyclopropyl tetramethrin chlorpyrifos wettable powder

Example two: 31% dicyclopropyl tetramethrin-chlorpyrifos water dispersible granule

Example three: 22% dicyclopropyl tetramat-chlorpyrifos suspending agent

Example four: 18% dicyloproxyfen-chlorpyrifos suspending agent

Example five: 16% microemulsion of dicrotophos-ethyl and chlorpyrifos

Example six: 15% dicyloproxyfen-chlorpyrifos microcapsule suspending agent

Example seven: 16% dicyclopropyl tetramethrin-chlorpyrifos water dispersible granule

Example eight: 28% dicyloproxyfen-chlorpyrifos suspending agent

Example nine: 30% dicyloproxyfen-chlorpyrifos suspending agent

Example ten: microemulsion of 11% dicrotofen-chlorpyrifos

Example eleven: 31% dicylcyclobuthyl chlorpyrifos wettable powder

Example twelve: 25.5% dicyclopropyl tetramethrin-chlorpyrifos water dispersible granule

According to the twelve examples, a field test of controlling the rice planthoppers by the 16% C-methyl-propidium-chlorpyrifos microemulsion and other compound formulas is carried out, and the synergistic effect after compounding is verified by comparing the effects with the effects of a single agent of 5% C-methyl-propidium-chlorpyrifos suspending agent and a single agent of 40% chlorpyrifos emulsifiable solution. The experiment was carried out in four treatments, each treatment being 4 replicates, the cells being randomly arranged and having a cell area of 30m²The planting habits of all the districts are the same as the local planting habits.

The survey criteria were: and (5) surveying 10-20 points and 2 clusters per point by a parallel jumping method in each cell after 1d, 3d, 7d and 14d of treatment, slightly placing a white porcelain plate at the base of the rice plant, beating the rice cluster by hands, surveying the number of insects per pot, and calculating the decline rate and the prevention and treatment effect. Specific data (data is the average of three replicates) are as follows:

TABLE 2 field efficacy test results for rice planthopper with different formulations

From the data, in the process of compounding different formulas, under the condition of using the same effective dose, after the dicyclopropyl and the chlorpyrifos are compounded, the control effect of the compound preparation on the rice planthopper is obviously higher than that of two single agents, and the control effect of the compound preparation 1d after the pesticide is applied exceeds that of the two single agents; 3d after the medicine is applied, the control effect of the compound preparation reaches more than 78 percent; 7 days after the pesticide is applied, the prevention and treatment effect of the compound preparation is better than that of 3 days after the pesticide is applied, and the prevention and treatment effect reaches more than 85%; 14 days after the pesticide is applied, the prevention and the treatment of the compound preparation are all more than 85 percent, which indicates that the compound preparation has longer lasting period.

In a word, the compounded preparation of the diproprionate and the chlorpyrifos not only improves the pesticide effect, but also prolongs the lasting period, which shows that the quick-acting property and the lasting period of the compounded preparation are obviously improved compared with the single preparation, and the use cost of farmers can be greatly reduced by using the compounded preparation, thereby having obvious synergistic effect on the safety of crops. The present invention can be implemented without significantly departing from the present invention, and the technical features described in the different technical aspects can be combined in any form to form other technical aspects. The above embodiments and examples are illustrative of the present invention, but are not intended to limit the scope of the present invention, and modifications and substitutions may be made without departing from the spirit of the claims.

Claims

1. A compound insecticide is characterized in that: the active ingredients comprise propiconate and chlorpyrifos, and the weight ratio of the propiconate to the chlorpyrifos is 1: 50-50: 1.

2. the compound pesticide according to claim 1, which is characterized in that: the preferable weight ratio of the propiconazole-diformate to the chlorpyrifos is 1: 30-30: 1.

3. the compound pesticide according to claim 1, which is characterized in that: the preferable weight ratio of the propiconazole-diformate to the chlorpyrifos is 1: 10-10: 1.

4. the compound pesticide according to claim 1, which is characterized in that: the active ingredients and the auxiliary materials are prepared into wettable powder, water dispersible granules, suspending agents, suspoemulsions, microemulsions and microcapsule suspending agents.