Biocontrol bacterium strain for antagonizing phytophthora nicotianae, field propagation method of fungicide of biocontrol bacterium strain and application of fungicide

Abstract

The invention relates to a biocontrol bacterium strain for antagonizing phytophthora nicotianae, a field propagation method of a fungicide of the biocontrol bacterium strain and application of the fungicide, and belongs to the technical field of application of microbial fungicides. The biocontrol bacterium strain for antagonizing phytophthora nicotianae is a biocontrol bacterium for antagonizing phytophthora nicotianae, has a preservation name of PE02TrichodermalongibrachiatumPE02, is preserved in China Center for Type Culture Collection in Wuhan University in Wuhan, China on December 12, 2020, and has a preservation number of CCTCC No. M2020784. The microorganism can be used for preparing microbial pesticides and microbial fertilizers. The invention also relates to application of the PE02 strain in preparation of a fungicide for preventing and treating tobacco black shank, and application of the fungicide prepared from the PE02 strain in prevention and treatment of tobacco black shank after being fermented by the field propagation method. The biocontrol bacterium strain has the beneficial effects that the fungicide prepared from the PE02 strain can be used for efficiently preventing and treating tobacco black shank after field propagation, and has the characteristics of reduction of use cost, high prevention effect, no residue and safety to human and livestock.

Description

Technical field: [0001] The invention relates to the technical field of application of microbial agents, in particular to a field propagation method and application of a biocontrol bacterial strain antagonizing Phytophthora nicotianae and the agent. Background technique: [0002] Many species of Trichoderma fungi are mycoparasites, which can parasitize at least 29 kinds of pathogenic fungi belonging to 18 genera. They are commonly used biocontrol bacteria for the prevention and treatment of plant fungal diseases, and are widely used in the development of biological pesticides and microbial agent products. The main mechanisms by which Trichoderma antagonizes pathogenic fungi include: competition, reparasitism, antibiotics, and induction of host resistance (Hu Xian et al., 2019). In addition, Trichoderma has the characteristics of strong adaptability, strong proliferative ability, high nutrient utilization rate, strong ability to improve rhizosphere, and good effect on promoti...

AI Technical Summary

Problems solved by technology

The present invention aims at the existing technical problems of Trichoderma fungus "low control effect, unstable control effect, and high use cost

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