The citrus flatid planthopper Metcalfa pruinosa, a invasive species causes serious damages to field crops, including sweet persimmon, soybean, maize, especially ginseng (Panax ginseng C.A meyer). We selected six chemical pesticides and one environmental friendly pesticide made from the mixture of derris extracts, citronella oils, and cinnamon extracts in laboratory. These pesticides showed over 90% of control effect in open ginseng field. This study was carried out with the support of the cooperative research program for RDA (project No. PJ0124992018), Republic of Korea.

• Young Su Lee(Gyeonggi Agricultural Research and Extension Services)
• Hee A Lee(Gyeonggi Agricultural Research and Extension Services)
• Eun Ju Park(Gyeonggi Agricultural Research and Extension Services)
• Hee Ok Min(Gyeonggi Agricultural Research and Extension Services)
• Sun Myoung Park(Gyeonggi Agricultural Research and Extension Services)
• Si Nae Park(Gyeonggi Agricultural Research and Extension Services)
• Hyun Ju Lee(Gyeonggi Agricultural Research and Extension Services)
• Soon Sung Hong(Gyeonggi Agricultural Research and Extension Services)
• Chang Sung Kang(Gyeonggi Agricultural Research and Extension Services)