Metcalfa pruinosa was first reported in 2009 in Gimhae persimmon farms in Korea, and in Chungnam province in 2011, they first occurred in Dangjin and Taean. M. pruinosa adults are known to lay eggs among the crevices beneath the bark of the host plants, and they are reported to lay mainly on Robinia pseuroacacia trees. However, in order to solve the problem that the time and effort are too much to investigate by moving the 10 cm branch of R. pseudoacacia and removing the whole bark, we investigated the number of wintering eggs at different parts of branches from R. pseudoacacia and surveyed occurrence of them in Chungnam province. 14.5 times and 5.4 times more eggs were observed in the hair tissues of the twigs and thorms bases than the surface of R. pseudoacacia trees, respectively. There was no difference in the number of branches according to the thickness of branches. M. pruinosa in Chungnam province were mainly occurred in Taean, Geumsan and Dangjin, and showed patterns that occurred mainly in highways.

• HwaYoung Seo(Chungnam Agricultural Research & Extension Serivices)
• InSu Whang(Chungnam Agricultural Research & Extension Serivices)
• GyungJu Lee(Chungnam Agricultural Research & Extension Serivices)
• DeongKee Park(Chungnam Agricultural Research & Extension Serivices)
• YongSeok Choi(Chungnam Agricultural Research & Extension Serivices)