A virus from entomopathogenic fungus BbrVV1 trans-species transmission attenuates plant pathogenic fungi and its application in the prevention and control of plant diseases

The cross-generic transmission of Victoria virus BbrVV1 to Sclerotinia sclerotiorum and Fusarium oxysporum has solved the shortcomings of fungal viruses in regulating relationships between fungal groups, and achieved effective control of plant diseases.

CN122146625APending Publication Date: 2026-06-05JILIN ACAD OF AGRI SCI
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Patent Information

Application Number
CN202610503891.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-16
Publication Date
2026-06-05

AI Technical Summary

Technical Problem

Existing technologies have limited understanding of how fungal viruses regulate antagonistic or cooperative relationships among different fungal groups. Furthermore, fungal viruses lack an extracellular stage in the natural environment and have a single mode of transmission, making them difficult to effectively apply to the prevention and control of plant diseases.

Method used

A Victoria virus BbrVV1 is provided that can spread across genera to Sclerotinia sclerotiorum and Fusarium oxysporum, significantly reducing their growth rate and sporulation, altering hyphal morphology, and enhancing Beauveria bassiana's antagonistic ability against these pathogens.

Benefits of technology

It significantly reduces the growth rate and sporulation of Sclerotinia sclerotiorum and Fusarium oxysporum, and enhances the antagonistic ability of Beauveria bassiana against these pathogens, providing a new biocontrol strategy.

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Abstract

The present application relates to the field of microbial technology, in particular to a virus BbrVV1 from entomogenous fungi which can be transmitted across species and used for preventing and controlling plant pathogenic fungi. The present application provides a new Victoria virus isolated from Beauveria bassiana, an important entomogenous fungi and biocontrol fungi, and named as BbrVV1. The virus can significantly inhibit the growth rate of the strain, change the morphology of the colony, reduce the spore production of the strain and the virulence of the host strain to Asian corn borer after infecting the strain of Beauveria bassiana. However, the virus can improve the antagonistic ability of the host strain of Beauveria bassiana to Sclerotinia sclerotiorum and Asian Fusarium. In addition, the virus can be transmitted across species to Sclerotinia sclerotiorum and Asian Fusarium and can be transmitted within the species of Sclerotinia sclerotiorum and Asian Fusarium. Most importantly, the virus can significantly reduce the pathogenicity of Sclerotinia sclerotiorum and Asian Fusarium. Therefore, the present application provides a new strategy for the biological control of Sclerotinia sclerotiorum and Asian Fusarium.
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Citation Information

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