Eighty kinds of pesticides registered in the peach and leaf perilla were assessed the efficacy against the 4th nymph stage of citrus flatid planthopper. Plant of Sharon, host plant preferred by citrus flatid planthopper, was cut from 5 to 7 cm and dipped 10 seconds into recommended concentrations of pesticides, respectively, and then dried naturally for the 30 minutes. New shoot of Plant of sharon treated pesticides and 10 to 15 final nymphs of citrus flatid planthopper put together in the 50㎖ tube and the number of live nymphs was investigated after 48 hours. Pesticides showing mortality over 90% were seven, namely, bifenthrin EW, Rhamda-cyhalothrin EC, Clothianidin SC, Benfuracarb SG, Chloropyrifos WP, Bifenthrin+methoxypenozide SC, Chloropyrifos+imidacloprid WP. When the forest surrounding the peach and leaf perilla was occurred and damaged by citrus flatid planthopper, the use of these pesticides is judged to be effective in the control of this pest.

• Ki-Su Ahn(Environment-Friendly Research Division, Chungbuk ARES)
• Jong-Woo Han(Environment-Friendly Research Division, Chungbuk ARES)
• Sun Kook Kim(Environment-Friendly Research Division, Chungbuk ARES)
• Ik-Jei Kim(Environment-Friendly Research Division, Chungbuk ARES)
• Gil-Hah Kim(Dept. Plant Medicine, Chungbuk National University)