Compound insecticide of bacillus thuringiensis, muscardine and meliaceae and its preparation method

Abstract

A composite insecticide contains Bacillus thuringienis, muscardine and nimbin, and is prepared from the gemma of Bacillus thuringienis and muscardine, and nim seed powder through proportionally mixing.

Description

technical field [0001] The invention relates to a production and preparation method of a compound insecticide of bacillus thuringiensis, beauveria bassiana and azadirachtin, and belongs to the field of biological pesticides. The insecticide can prevent and control various pests, and can be widely used in various fields such as agriculture, forestry, animal husbandry and the like. Background technique [0002] Bacillus thuringiensis (bacillus thuringiensis referred to as Bt) is currently the largest and most widely used type of bacterial insecticide in the world, accounting for more than 70% of the total biological pesticides. my country's research on Bacillus thuringiensis began in 1958, and it began to be put into industrial production in the 1970s. Now there are dozens of domestic manufacturers, with an annual output of about 30,000 tons. Bt insecticides have made great contributions in preventing and controlling pests and increasing the yield of food and economic crops, ...

AI Technical Summary

Problems solved by technology

Bt insecticides have made great contributions in preventing and controlling pests and increasing the yield of food and economic crops, but because it is mainly through stomach poisoning, the drug effect is slow and the insecticidal effect is not complete. Bacillus (Bt) has produced reports of drug resistance, so its popularization has been limited to a certain extent

Beauverin bassiaua is a broad-spectrum entomopathogenic fungus, which can parasitize more than 700 kinds of harmful insects. It has strong pathogenicity, strong adaptability, and long-lasting effect. Pteroptera pests and Coleoptera pests, such as cabbage caterpillar, diamondback moth, cotton bollworm, corn borer, scarab, and underground pests grub, mole cricket, etc., have special effects on pine caterpillars, but because the effective insecticidal substance of Beauveria bassiana is living spores, Therefore, it has higher requirements on the spraying environment, and it will die naturally when the temperature is higher, so it is difficult to guarantee its effect when used alone.

Azadirachtin (azadirachtin) is a broad-spectrum plant insecticide extracted from neem species. It can control more than 200 kinds of pests and has excellent insecticidal activity. At present, nearly 20 countries in the world have regulated neem. Trees are used for research, development and utilization. Pests are not easy to develop drug resistance during use. The disadvantage is that it is unstable and the drug effect is slow.