Compound bacterial manure used for prevention and control of cotton verticillium wilt and the preparation method thereof

Abstract

The invention discloses a compound bacterial manure used for prevention and control of cotton verticillium wilt and the preparation method thereof. Materials of the compound bacterial manure consist of Streptomyces aburaviensis, Streptomyces tanashiensis, Brevibacillus agri, Bacillus clausii, Trichoderma citrinoviride, and potassium fulvic acid. Bacteria of the invention can make full use of the interspecific or intraspecific antibiosis, competition, hyperparasite, and bacteriolysis of microbes, and induce cotton to generate the disease resistance ability through secondary metabolite, thereby producing various antibiotic substances such as luteomycin and aburamycin to prevent the pathogenic bacteria of cotton verticillium wilt. The 5 strains used in the invention can be obtained through separation from soil directly; the strains can promote the growth of root, and secrete some secondary metabolites to plant roots while growing on the plant surface, inside the plant or in soil, thereby improving the plant's absorption of nutrients, and promoting the plant growth like fertilizers.

Description

technical field [0001] The invention belongs to the technical field of agricultural biological control and microbial fertilizer, and in particular relates to a compound microbial fertilizer for preventing and controlling cotton verticillium wilt and a preparation method thereof. Background technique [0002] Cotton Verticillium dahliae is a soil-borne disease that is caused by Verticillium dahaliae and is difficult to control. Cotton verticillium wilt frequently breaks out in my country, and the cotton planting area affected by it is more than 40 million mu every year, causing a reduction in cotton production by about 10%-20% all the year round, and the production reduction can be as high as 60%- 70%. [0003] The methods of preventing and treating Verticillium wilt of cotton mainly include: one is chemical control, but the effect of chemical control is relatively poor, and it is easy to cause environmental pollution and destroy the ecological balance of farmland; the other ...

AI Technical Summary

Problems solved by technology

[0012] Due to the diversity and synchronous evolution of pathogenic bacteria, a single antagonistic bacterial strain cannot achieve an ideal control effect. Therefore, many biological functions of biocontrol bacteria need to rely on the synergy between two or more strains of bacteria to exert a better effect. good effect