Insect virus and beauveria bassiana mixing insecticide suspending agent and preparation method thereof

Abstract

The invention relates to an insect virus and beauveria bassiana mixing insecticide suspending agent and a preparation method thereof. Beauveria bassiana and insect viruses are mixed, so that the insecticidal spectrum is expanded, and the insecticide capacity is improved; mixing of the beauveria bassiana and the insect viruses can achieve a synergism effect; furthermore, by adding of a high-activity organic silicon surfactant and combination of a small quantity of insect epicutile chitin suppressing agents, the surface tension of the preparation is reduced, and the interface performance is changed, so that the drug and the body wall of an insect can be well affined, and the drug can quickly enter the insect body; therefore, the infection rate of the insect viruses and the beauveria bassiana is greatly increased, and the fast-acting property and the insecticidal activity of the drug are greatly improved; and meanwhile, by adding of an adsorbent, a light protecting agent, an antioxidant and the like, spores and virus particles are effectively protected; the shelf life is prolonged, and requirements of agricultural production and sanitation and insect prevention and treatment of forests and steppes are met.

Description

technical field [0001] The invention relates to the technical field of insecticides, in particular to an insecticidal suspension mixed with insect viruses and Beauveria bassiana and a preparation method thereof. Background technique [0002] The use of chemical pesticides has caused a lot of pollution, such as water pollution, soil pollution, air pollution and so on. These serious threats to people's life and health have led to the occurrence of a large number of malignant diseases such as tumors. Not only that, in order to one-sidedly pursue the control effect, farmers often use excessive doses and large doses of pesticides. This unscientific way of using medicines has led to the occurrence of a large number of resistance to chemical pesticides. [0003] Biological pesticides are widely considered as an important means to solve the adverse effects of chemical pesticides, and more and more attention has been paid to them. Biopesticides are divided into three categories: ...

AI Technical Summary

Problems solved by technology

But its limitation is that the amplification ability of Bacillus thuringiensis itself in the insect body is limited. In the periodical "Tropical Forestry" 1995, Volume 23, pages 116-119, "Analysis of the application of Beauveria bassiana and polyhedrosis virus in Chengmai forest farm to control pine caterpillars", The effects of using Beauveria bassiana and polyhedrosis virus to control pine caterpillars were compared. Among them, Beauveria bassiana control pine caterpillars showed symptoms of infection on the 10th day, and on the 25th day, the larvae appeared, and the control effect was about 55%. The environmental requirements are high, the drug effect is slow, and the control effect on older insects is not good. However, Beauveria bassiana is cheap and the production process is simple. On the other hand, polyhedrosis viruses do not have strict environmental requirements. Spraying in the sun, the efficacy is obvious, the control effect can reach about 70%, and the infection and death occurred in 3 days, a large number of deaths occurred in 6-8 days, and the death peak appeared in 10-15 days. The control effect on older insects is obvious, but due to technical limitations , in the "Analysis of Beauveria bassiana and polyhedrosis virus to control pine caterpillars in Chengmai Forest Farm", Beauveria bassiana and virus were not mixed together, and the dosage form used was less effective. The original powder preparation did not provide an efficient scientific The dosage form formula has a significant impact on the effect of biological pesticides. Suspension concentrate is an advanced dosage form. Suspension concentrate refers to the preparation that uniformly disperses the particles of solid pesticide particles under 4 microns in water. Suspension concentrates do not have the problem of dust flying like wettable powders, are not easy to explode, have small particles, high biological activity, high specific gravity, and small packaging volume. Compared with other pesticide formulations, they are safe and environmentally friendly, and various additives are often added agent, which greatly improves the use effect, persistence, and stability of the original pesticide

[0005] There is a high interfacial tension between the lipophilic skin of the pest and the agent used in water, which makes it difficult for the agent to be compatible with the surface of the pest and the plant. Unreasonable preparations will not only cause the inactivation of some organisms, but also cause Greatly reduce its effect, thus affecting the quick-acting effect and the overall control effect. Adding substances that can protect organisms from various stress factors in the dosage form, the preparation is light-stable, strong in stress resistance, and has a good practical effect. The new formulation is the key to the preparation of biopesticide formulations