This study was conducted to survey the insect pests on 30 varieties of Hibiscus syriacus. Insect pests were investigated on May, July and September in Suwon and Busan, respectively. In addition, change of insect pests on H. syriacus in Seoul was weekly investigated from May to September. As a result, 11 species 116 individuals were observed in Suwon, and 10 species of them were classified as insect pests. Also, 10 species 496 individuals were observed in Busan, and 7 species of them were classified as insect pests. In Seoul, 12 species 181 individuals were observed. Abundance and species richness of insect pests were depend of the study regions but not by H. syriacus varieties. Aphis gossypii was dominant in early May but they were dramatically disappeared since middle May. Other insect pests such as Rehimena surusalis, Haritalodes derogate, and Plautia stali were occurred from July to september.

• Mannyun Kim(Division of Forest Diseases and Insect Pests, National Institute of Forest Science)
• Jong-Kook Jung(Division of Forest Diseases and Insect Pests, National Institute of Forest Science)
• Hae-Yun Kwon(Forest Tree Improvement Division, National Institute of Forest Science)