The invention is applicable to the field of microbial pesticides, and provides
serratia marcescens and application thereof in prevention and treatment of
fall webworm, the
serratia marcescens is YZNUH-02, and the preservation number is CGMCC No.36002. The
serratia marcescens YZNUH-02 strain provided by the invention is separated from naturally infected
fall webworm larvae, and the serratia marcescens YZNUH-02 strain can be applied to prevention and treatment of
fall webworm. The composition has strong
pathogenicity on
hyphantria cunea larvae, has high insecticidal efficiency, takes effect more quickly compared with the existing biological control means, and can quickly control the
population quantity of
hyphantria cunea. The strain and the related
biopesticide belong to microbial source preparations, are green and environment-friendly, cannot cause environmental
pollution after being used, cannot cause
drug resistance of pests, and accord with the sustainable prevention and control concept.