Bacterial wilt biocontrol bacterium for tobacco, bacterial agent and preparation method and application of bacterial wilt biocontrol bacterium

The invention belongs to the technical field of microbial control, and particularly relates to a bacterial wilt biocontrol bacterium for tobacco, a bacterial agent and a preparation method and application of the bacterial wilt biocontrol bacterium. The biocontrol bacterium is bacillus atrophaeus, is named as BS17, and is preserved in the China Center for Type Culture Collection (CCTCC) on September 18, 2023, and the preservation number is CCTCC M 20231743. The bacillus atrophaeus can be used for preparing a bacterial wilt biocontrol inoculant and a microbial compound fertilizer for tobacco with a growth promoting function, and the bacillus atrophaeus is colonized in tobacco rhizosphere for a long time by utilizing the specific affinity of the bacillus atrophaeus and the tobacco, so that the effects of growth promoting and bacterial wilt prevention and treatment can be stably exerted. 本发明属于微生物防治技术领域，具体涉及一种烟草用青枯病生防菌、菌剂及其制备方法和应用。该生防菌为萎缩芽胞杆菌(Bacillus atrophaeus)，其命名为BS17，2023年9月18日保藏在中国典型培养物保藏中心，保藏编号为CCTCC M 2023