Method for preparing protein biological pesticide

Abstract

A protein-type biologic agricultural chemical for grain crops, cotton, vegetables, fruit tree, melon, etc is prepared through solid fermenting of Bacillus thuringinis, adding S-bond breaking agent and water, reaction, filtering, drying, and preparing wettable powder, water-dispersible form, or effervescent tablet.

Description

technical field [0001] The invention relates to the technical field of biopesticides, and in particular provides a preparation method of protein biopesticides. Background technique [0002] Biopesticide is an important guarantee for the safe production and export of agricultural products. It has developed rapidly in recent years. Bacillus thuringiensis (Bt) is a dominant biopesticide. Its production process is: Bt liquid (or solid state) fermentation, drying, Pulverize to obtain the original powder. Due to the high production cost, low product titer and large amount of waste water, liquid fermentation has gradually turned to solid-state fermentation (Fang Ping, Journal of Nanjing University of Technology. 2002: 6(24), 84-85). The raw powder (<74 μm) of solid-state fermented Bt not only contains active ingredients such as parasporal crystals, spores, and exotoxins, but also contains unconsumed fermentation raw materials. Some raw materials (such as chaff) are hard and tou...

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Problems solved by technology

The raw powder (<74 μm) of solid-state fermented Bt not only contains effective ingredients such as paraspore crystals, spores, and exotoxins, but also contains unconsumed fermentation raw materials. Some raw materials (such as chaff) have high hardness and toughness. Pulverization has caused an involuntary increase in production costs, and at the same time, the toxicity of the original powder has also been reduced due to the existence of these ineffective ingredients

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