The gut microbial community structure of the oriental armyworm Mythimna separata (Walker) (Lepidoptera: Noctuidae) affects the the virulence of the entomopathogenic fungus Metarhizium rileyi.

ABSTRACT: Mythimna separata, the oriental armyworm, is a lepidopteran pest that threatens cereal crops. In the current study, two strains (XSBN200920 and JHML200710) of entomopathogenic fungus Metarhizium rileyi were tested for virulence against oriental armyworms. When treated with spore suspensions of both strains at a concentration of 1.0 × 10⁸ spores/mL, the 3rd instar larvae's survival rate was considerably different (P < 0.01). The median lethal time of the insects exposed to XSBN200920 was about 3 d longer than that of JHML200710. The results of 16S ribosomal RNA sequencing showed that Chao1 richness in the JHML200710 treatment group was significantly decreased compared with the CK ( 0.02% Tween 80). The dominant gut bacteria species at the phylum level were Proteobacteria, Firmicu

SUBMITTER: Peng Y 

PROVIDER: S-EPMC12013004 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature