Phytophthora parasitica var nicotianae antagonistic microbial agent as well as preparation method and application thereof

The invention belongs to the technical field of microbial control, and particularly relates to a phytophthora parasitica var nicotianae antagonistic microbial agent as well as a preparation method and application thereof. The microbial inoculum is formed by fermenting a BJGJ-4 strain, the classification name of the BJGJ-4 strain is Streptomyces sp., the BJGJ-4 strain is preserved in the China Center for Type Culture Collection on October 26, 2022, and the preservation number is CCTCC M 20221665. The invention further discloses a preparation method of the microbial inoculum. The BJGJ-4 strain has relatively high inhibitory activity on tobacco black shank, has high affinity with tobacco, can be colonized and propagated in rhizosphere soil of tobacco plants, and has a continuous control effect on tobacco black shank. 本发明属于微生物防治技术领域，具体涉及一种烟草黑胫病菌拮抗微生物菌剂及其制备方法和应用。该菌剂由BJGJ-4菌株发酵而成，所述BJGJ-4菌株的分类命名为链霉菌属(Streptomyces sp.)，2022年10月26日保藏在中国典型培养物保藏中心，保藏编号为CCTCC M 20221665。BJGJ-4菌株对烟草黑胫病菌具有较高的抑制活性，且BJGJ-4菌株与烟草具有高度亲和性，其可以在烟