Method for preparing fungicide by using bran and rice husk

Abstract

The invention discloses a method for preparing a bactericide from rice hulls, which comprises the following steps: uniformly mixing bran and rice hulls, and dissolving sugar in water to form a sugar solution; mixing Saturnospora dispora, Zygosaccharomyces bailii and Acetobacter xylinum; putting the mixture into a fermenting tank layer by layer, wherein the mixed solution of the sugar solution and mixed bacterium solution is uniformly sprayed on each layer until the layer is moistened; fermenting at constant temperature, filtering the fermented liquor to obtain fermentation liquor and solid residues, adding sodium hydroxide into the obtained fermentation liquor to regulate the pH value, and filtering to obtain a mixture containing apigenin (belonging to flavones), 5-nonadecyl resorcinol, 5-heneicosyl resorcinol and 5-tricosyl resorcinol (belonging to alkyl resorcinols), and pentosan, chitosan, oligosaccharide, amino oligosaccharide, lentinan and pujuxitang; and preparing the plant-source agricultural bactericide by using the mixture. The preparation technique is simple and suitable for large-scale production; and the plant-source agricultural bactericide has the advantages of high safety, environmental protection and no pesticide residue.

Description

technical field [0001] The invention relates to a method for preparing a fungicide, in particular to a method for preparing a fungicide using bran and rice husk. Background technique [0002] Due to the long-term use of chemical pesticides, the excess of various chemical pesticide residues has seriously affected people's health, and the development of environmentally friendly biological pesticides has become the main task of current pesticide science. [0003] The utilization of bran is very wide, also has report in the production of insecticide, as the production and the use method of the Bacillus thuringiensis solid fermentation product disclosed in Wang Tao (application number: 97109229.X); Tao Yugui's biopesticide solid fermentation condition In relevant reports such as studies, all describe the method of using bran as a medium, adding Bacillus thuringiensis for microbial fermentation, and producing insecticides. Rice husks are mostly used for wine making, and in the st...

AI Technical Summary

Problems solved by technology

[0004] However, using bran and rice husk as raw materials to select suitable strains for fermentation to prepare agricultural fungicides, which is suitable for large-scale production, has a safe and environmentally friendly production process, and has not been reported yet.