Compound bacterium for preventing and treating root-knot nematode and preparation method thereof

Abstract

The invention discloses a compound bacterium for preventing and treating root-knot nematode and a preparation method thereof. The compound bacterium for preventing and treating root-knot nematode is prepared by the following steps: carrying out high-density cultivation on raw material strains of bacillus thuringiensis, pseudomonas fluorescens, bacillus subtilis, streptomycete, aspergillus niger, paecilomyces lilacinus and fusarium oxysporum, inoculating activated and cultivated strains in a fermentation tank and implementing fermentation and extended cultivation; dehydrating and drying various single strains obtained from extended cultivation to obtain resting microorganism dry powder; and mixing 10-20 parts of bacillus thuringiensis, 5-10 parts of pseudomonas fluorescens, 10-20 parts of bacillus subtilis, 10-20 parts of streptomycete, 10-15 parts of aspergillus niger, 10-25 parts of paecilomyces lilacinus and 8-15 parts of fusarium oxysporum to obtain the compound bacterium for preventing and treating root-knot nematode. The compound bacterium disclosed by the invention is used for preventing and treating root-knot nematode; and compared with an existing product, the compound bacterium is environment-friendly, harmless and non-toxic to a human body and good in control efficiency.

Description

technical field [0001] The invention relates to the technical field of bioengineering microbial fermentation, in particular to a compound bacterial preparation for preventing and controlling root-knot nematode and its preparation technology. Background technique [0002] Root-knot nematode is a kind of pathogenic organism that widely parasitizes the roots of plants, causing serious harm to economic crops such as vegetables, fruit trees and medicinal plants. [0003] Root-knot nematode control methods include crop rotation, breeding of nematode-resistant varieties and use of nematicides. Among them, crop rotation is widely used for disease prevention, but it has great limitations for some special economic crops or specific areas that cannot meet the requirements of reasonable crop rotation, and is not suitable for the control of root-knot nematodes with a wide host range. Conventional disease resistance breeding has been slow due to two problems: one is the use of a single r...

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