CN111374144A

CN111374144A - Insecticidal composition

Info

Publication number: CN111374144A
Application number: CN201811616791.5A
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: 2018-12-27
Filing date: 2018-12-27
Publication date: 2020-07-07

Abstract

The invention relates to an insecticidal composition, which contains two active components of propiconazole and imidacloprid. The insecticidal composition has high efficiency, low toxicity and wide insecticidal spectrum. The dosage is reduced, the generation of drug resistance is delayed, the pollution to the environment is reduced, and the drug harm is not easy to generate. The insecticidal composition can be prepared into a suspending agent, a dispersible oil suspending agent, a wettable powder, a water dispersible granule and a microcapsule suspending agent, is used for controlling agricultural pests, and particularly has an obvious control effect on aphids.

Description

Insecticidal composition

Technical Field

The invention belongs to the field of pesticides, and particularly relates to an insecticidal composition of propiconazole and imidacloprid.

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.

Imidacloprid (Imidacloprid) is a nitromethylene systemic insecticide, is an action body of a nicotinic acid acetylcholinesterase receptor, interferes the motor nervous system of pests to cause the failure of chemical signal transmission, and has no cross resistance problem. Imidacloprid is a new generation of chloronicotine pesticide, has the characteristics of broad spectrum, high efficiency, low toxicity, low residue, difficult generation of resistance by pests, safety to people, livestock, plants and natural enemies and the like, and has multiple drug effects of contact poisoning, stomach toxicity and systemic absorption. After the pests contact the pesticide, normal conduction of central nerves is blocked, so that the pests die in paralysis. The quick-acting property is good, the prevention effect is high after 1 day, and the residual period is as long as about 25 days. The pesticide effect and the temperature are positively correlated, the temperature is high, and the insecticidal effect is good. The insecticidal composition is mainly used for preventing and controlling pests with piercing-sucking mouthparts.

Wheat aphids are important pests on wheat and belong to the homoptera. Common wheat aphids in China include sitobion avenae, schizaphis graminicola and sinonovacula avenae. The three aphids are distributed in each wheat area of Anhui and are often mixed, and the major aphids are the sitobis avenae and the binary aphids. Wheat aphids prick the sap of wheat stems, leaves and young ears with adults and nymphs. The wheat is damaged in seedling stage, the leaf color of the light wheat is yellow, the growth is stagnated, the tillering is reduced, and the wheat is withered and dead in the heavy wheat. The ear period is damaged, the wheat grains are not full, and when the ear is severe, the wheat grains are dry and not fruitful, even the whole plant dies.

As farmland pests cause great loss to crop production every year, and considering that the pests are easy to generate resistance and cause greater pollution to the environment by using a single variety of pesticide for a long time, field experiments show that 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 by mixing the existing pesticide with another pesticide with different action mechanisms, so that the insecticidal effect is improved, the insecticidal spectrum is enlarged, the environmental pollution is reduced and the pesticide application cost is reduced by compounding the propiconazole and the imidacloprid.

Disclosure of Invention

The invention aims to provide an environment-friendly insecticidal composition with high efficiency, low toxicity, long lasting effect, high quick action. In particular to a pesticide preparation taking the dicyclopropyl tetramat and the imidacloprid as effective components.

In the insecticidal composition, the weight ratio of the propiconazole to the imidacloprid is 1: 60-60: 1, and the preferable weight ratio is 1: 30-30: 1, more preferably in a weight ratio of 1: 10-10: 1.

the insecticidal composition can be prepared into dosage forms of the invention, including wettable powder, water dispersible granules, suspending agents, dispersible oil suspending agents 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 insecticidal composition has the advantages and beneficial effects that ① insecticidal range is wide, the insecticidal composition is efficient for piercing-sucking mouthpart pests, ② toxicity is low, quick effect is achieved, lasting effect is achieved, ③ residue is free, pollution is avoided, and the insecticidal composition is safe to the environment, ④ composite preparation is used, two effective components have synergistic effect, and the dosage is reduced compared with that of single use, so that insecticidal effect of the effective components is improved, safety is improved, and environmental pollution is reduced.

The applicant firstly carries out formulation screening research on the propiconazole and the imidacloprid, and determines an indoor bioassay object as the myzus avenae aiming at the action characteristics of the two components, wherein the specific test conditions and results are as follows:

the indoor bioassay method comprises the following steps: sticking a 2cm double-sided adhesive tape on a glass slide, soaking aphids in the liquid medicine for 5-10S, sucking the redundant liquid medicine by using filter paper, and transferring the test insects to a normal condition for feeding. Soaking insects for 10-20 times for 4 times, and treating with organic solvent without drug as control. Statistical processing was performed using SPSS software. Calculating toxicity regression formula, lethal middle concentration, correlation coefficient, etc., and calculating cotoxicity coefficient by Sun cloud Peter 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 toxicity test results of Myzus avenae with different ratios

The analysis of the above results shows that when the propiconazole and the imidacloprid are compounded according to different proportions, the co-toxicity coefficient of all the compounding 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: 30.5% dicyclopropyl imidacloprid wettable powder

Example two: 31% propiconate imidacloprid water dispersible granule

Example three: 11% propiconazole-imidacloprid suspension

Example four: 24% double-propidium-imidacloprid dispersible oil suspending agent

Example five: 15% double-propidium and imidacloprid microcapsule suspending agent

Example six: 10% dicyclopropyl tetramisole/imidacloprid water dispersible granule

Example seven: 20% dicyclopropyl tetramisole/imidacloprid water dispersible granule

Example eight: 27% propiconazole-imidacloprid suspension

Example nine: 12% dicyclopropyl tetramisole-imidacloprid water dispersible granule

Example ten: 22% amitraz-imidacloprid suspension

Example eleven: 31% amitraz-imidacloprid wettable powder

Example twelve: 30.5% dicyclopropyl imidacloprid water dispersible granule

According to the twelve examples, a field test of controlling the rice planthoppers by using 10% of the diproprionate and imidacloprid water dispersible granules 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 preparation of 5% of diproprionate suspending agent and a single preparation of 10% imidacloprid wettable powder. 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: sampling 5 points per cell, investigating aphid base numbers of 20 plants per point, investigating once after 1, 3, 7 and 14d after application, and calculating the prevention and treatment effect. Specific data (data is the average of three replicates) are as follows:

TABLE 2 field test results of pesticide effect of different formulations on wheat aphid

From the data, in the process of compounding different formulas, under the condition of using the same effective dose, after the propiconazole and the imidacloprid are compounded, the control effect of the compound preparation is obviously higher than that of two single agents, and the control effect of the compound preparation 1d after the pesticide is applied is better than that of the two single agents; 3d after the medicine is applied, the control effect of the compound preparation reaches more than 77 percent; 7 days after the pesticide is applied, the control effect of the compound preparation is better than that of 3 days after the pesticide is applied, and reaches more than 85%, 14 days after the pesticide is applied, the control effect of the compound preparation is more than 85%, and the effect of the compound preparation is longer.

In a word, the compound preparation of the diproprionate and the imidacloprid 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 compound preparation are obviously improved compared with the single dose, and the use cost of farmers can be greatly reduced by using the compound 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. An insecticidal composition characterized by: the active ingredients comprise the diproprionate and the imidacloprid, and the weight ratio of the diproprionate to the imidacloprid is 1: 60-60: 1.

2. the insecticidal composition of claim 1, wherein: the preferable weight ratio of the propiconazole to the imidacloprid is 1: 30-30: 1.

3. the insecticidal composition of claim 1, wherein: the preferable weight ratio of the propiconazole to the imidacloprid is 1: 10-10: 1.

4. the insecticidal composition of claim 1, wherein: wettable powder, water dispersible granules, suspending agents, dispersible oil suspending agents and microcapsule suspending agents are prepared from active ingredients and auxiliary materials.