The citrus leaf miner (CLM) is a of important citrus pests in Jeju island, but it’s not clear about ecology of over-wintering in Jeju. We investigated the developmental stage to know how the CLM overwinters in 20 sites. And we investigated the mortality of larvae, pupae and adult stage of CLM in open citrus cultivated field December, 2017 to April 2018 and growth chamber conditions(from –10 to 5 ℃). As a result, no larvae and adult survived open field during winter. We concluded that the CLM usually overwinters as pupa during winter.

• Soon Hwa Kwon(Citrus Research Institute, National Institute of Horticultural and Herbal Science, Korea)
• Rok Yeun Hwang(Citrus Research Institute, National Institute of Horticultural and Herbal Science, Korea)
• Cheol Woo Choi(Citrus Research Institute, National Institute of Horticultural and Herbal Science, Korea)
• Jae Wook Hyun(Citrus Research Institute, National Institute of Horticultural and Herbal Science, Korea)
• Dong Soon Kim(Jeju National University)