Biological Characteristic of Obolodiplosis robiniae and insecticidal activity of some insecticides against larvae of O. robiniae were investigated. Egg was in oval shape, and its color was light orange and became red when close to hatch. Length of the major axis and the minor axis of egg was 0.4 ㎜ and 0.1 ㎜, respectively. Larval color was milky and size was 2.6 ㎜. Pupa was deep brown and its size was about 3.2 ㎜. Wing and abdomen of adult was black and reddish, respectively. Size of female adult was about 3.3 ㎜, and larger than male adult. Number of eggs in the ovary was 192.3±50.7. First emergence was from late April to late May, and second from late May to late June. Third emergence was from late June to late July. Newly emerged adult escaped from soil, and second and third emerged adult escaped directly from gall of Robinia pseudoacacia leaf. Egg parasitoid was identified as Platygaster robiniae and parasite rate was 51.6%. Among test insecticides, imidacloprid 10% WP and thiacoprid 10% FL showed very strong insecticidal activity against larvae of O. robiniae at 48h later after treatment.

• 박지두
• 신상철
• 김철수
• 전문장
• 박일권