In Korea, two sawyer beetle species belonging to genus Monochamus are vectors that transmits the pine wood nematode. In this study, we surveyed the seasonal change of spatiotemporal distribution of Monochamus alternatus and Monochamus saltuarius. A total of 360 multi-funnel traps were placed in three different regions, such as Gapyeong, Yeongdeok, and Jeju. In M. saltuarius, we collected 1,496 individuals and 709 individuals in Gapyeong and Yeongdeok, respectively, and in M. alternatus 348 individuals and 113 individuals were collected in Jeju and Yeongdeok, respectively. We analysed their patterns in spatiotemporal distribution using by global spatial autocorrelation. In M. alternatus, spatially clustering on Jeju was observed in July and August, and M. saltuarius in a site of Gapyeong was clustered. These spatiotemporal distributions of two Monochamus species may be probably related to their behavior, such as maturation feeding and dead tree searching.

• Jong-Kook Jung(Division of Forest Insect Pests and Diseases, National Institute of Forest Science)
• Hyoseok Lee(Division of Forest Insect Pests and Diseases, National Institute of Forest Science)
• Hye Jung Song(Division of Forest Insect Pests and Diseases, National Institute of Forest Science)
• Sang-Hyun Goh(Division of Forest Insect Pests and Diseases, National Institute of Forest Science)
• Chan Sik Jung(Division of Forest Insect Pests and Diseases, National Institute of Forest Science)