Bacillus velezensis strain from marine source SCSX9, biocontrol composite microbial agent, and preparation method and application thereof

The biocontrol compound agent prepared by marine-derived Bacillus bellis SCSX9 and Bacillus bellis 12Y solves the problems of narrow antibacterial spectrum and poor stability of existing biocontrol agents, and achieves broad-spectrum control of postharvest fungal diseases of fruits and environmentally friendly fruit preservation effects.

CN121653020BActive Publication Date: 2026-05-08SANYA INSTITUTE OF NANJING AGRICULTURAL UNIVERSITY
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Patent Information

Application Number
CN202610172536.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2026-02-06
Publication Date
2026-05-08
Estimated Expiration
2046-02-06

AI Technical Summary

Technical Problem

Existing biocontrol agents have a narrow spectrum of inhibition and poor stability in the control of postharvest fruit diseases, making them difficult to effectively deal with complex infections. Furthermore, chemical control poses a risk of environmental pollution, while physical control affects fruit quality.

Method used

A biocontrol compound agent was prepared by using marine-derived Bacillus bellis SCSX9 and its fermentation products, combined with Bacillus bellis 12Y. Through synergistic effects, it broadly inhibits bacteria and forms a biofilm on the fruit surface, thereby enhancing the fruit's resistance to adverse conditions.

Benefits of technology

It significantly improved the inhibition rate against various pathogens, reduced the incidence of postharvest fungal diseases in fruits, extended the shelf life of fruits, improved fruit quality and storage time, and avoided environmental pollution from chemical control.

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Abstract

The present application relates to the technical field of microorganism technology and postharvest disease biological control of fruits and vegetables, and particularly relates to a marine source bacillus velezensis SCSX9, a biocontrol composite microbial agent, and a preparation method and application thereof.The marine source bacillus velezensis SCSX9 is obtained by separation and screening, and the strain, fermentation product (bacterial suspension, bacterial fermentation broth) and green biocontrol microbial agent thereof can effectively inhibit various pathogenic bacteria, thereby safely and effectively controlling the occurrence and development of plant diseases.Further, the biocontrol composite microbial agent composed of the bacillus velezensis 12Y can produce various antibacterial substances, through the synergistic effect between the strains, significantly improves the broad-spectrum bacteriostasis, stability and control efficiency, prolongs the fruit preservation period and storage time, improves the quality of strawberries and mangoes, and has high economic significance in agricultural production.
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