Abstract:

In recent years, Monolepta signata has increased in population size year after year, becoming an essential pest on corn, soybeans, and other crops due to its wide distribution, diverse hosts, and severe damage. From July to September in 2022, a parasitic wasp parasitizing M. signata adults in the fields of Gongzhuling, Jilin province was collected. It was identified by morphology and molecular method as Streblocera (Eutanycerus) okadai Watanabe of Braconidae. Based on CO I genes, the wasp species was phylogenetically clustered with the genus Streblocera. This is the first report of parasitic enemies of M. signata, which may provide a new strategy for the biological control of this pest.

Key words: parasitic wasp, Streblocera okadai, Monolepta signata, morphological characteristics