Strawberry root rot biocontrol bacterium, fungicide and preparation method and application of strawberry root rot biocontrol bacterium

The invention belongs to the technical field of microorganisms, and particularly relates to a strawberry root rot biocontrol bacterium, a bacterium agent and a preparation method and application thereof. The biocontrol bacterium is bacillus velezensis, is named as DH18, is preserved in the China Center for Type Culture Collection (CCTCC) on August 11, 2023, and has the preservation number of CCTCC M 20231430. The bacillus velezensis can be used for preparing a strawberry root rot biocontrol microbial inoculant and a microbial compound fertilizer with a growth promoting function, and the bacillus velezensis can be stably colonized at the rhizosphere of strawberries by utilizing the specific affinity of the bacillus velezensis and the strawberries, so that the effects of growth promoting and root rot prevention and treatment can be stably exerted. 本发明属于微生物技术领域，具体涉及一种草莓用根腐病生防菌、菌剂及其制备方法和应用。该生防菌为贝莱斯芽胞杆菌(Bacillus velezensis)，其命名为DH18，2023年8月11日保藏在中国典型培养物保藏中心，保藏编号为CCTCC M 20231430。该贝莱斯芽胞杆菌能够用于制备具有促生功能的草莓用根腐病生防菌剂及微生物