Ctenoplusia agnata (Lepidoptera: Noctuidae) is a polyphagous pest that damage on crops belonging to the Fabaceae and Brassicaceae, and it is known as a migratory pest. In this study, we investigated pattern of occurrence to trace invasion characteristics using sex pheromone traps and conducted genetic analysis of captured individuals while also exploring their correlation with air currents. Our findings suggest that C.agnata exhibits an annual occurrence of four generations in Korea, with the second or third generation, primarily active from July to September, posing a significant threat to soybean. Genetic analysis revealed the presence of 17 haplotypes, and trajectory modeling confirmed the influence of air currents from Kyushu, Japan and Zhejiang, China etc. These results are expected to be used as a comprehensive management of C.agnata and other migratory moth species.

• Dagyeong Jeong(Crop Protection Division, National Institute of Agricultural Science, RDA) Corresponding author
• Hong Hyeon Park(Crop Protection Division, National Institute of Agricultural Science, RDA)
• Gwan-Seok Lee(Crop Protection Division, National Institute of Agricultural Science, RDA)
• In Hong Jeong(Crop Protection Division, National Institute of Agricultural Science, RDA)
• Min Hyeuk Lee(Crop Protection Division, National Institute of Agricultural Science, RDA)