Studies on the Bionomics and Methods of Control of Chinolyda flagellicornis (Hymenoptera, Symphyta, Pamphiliidae)

The sawfly Chinolyda flagellicorms (F. Smith) is a destructive forest pest, severely injuring to Cupressus funebris Endl. and Cryptomeria fortunei Hooibrenk ex Otto et Dietr.. It has one generation a year. Aestivation and hibernation takes place as prepupae in the soil. The adults emerge in early May in the following year and lay eggs soon afterwards. The peak of damaging period of the larvae is early and mid June. Using 3Y-35 type of insecticidal smoke producing machine and the mixed insecticide of 1 part 5% Decamethrin and 20 parts Diesel Oil to produce insecticidal smoke is very effective to kill 1-4 instar larvae.