Abstract: The olfactory response of adult Conopomorpha sinensis Bradley to volatiles extracted from different tissues of host plant was evaluated by Y-shaped olfactometer under laboratory conditions. The results showed that the attractive rates of volatile from pulp of litchi and longan to unmated females reached 76% and 68% respectively,while the attractive rates of volatiles from leaves of two hosts were only 32% and 40% respectively. The attractive rates of volatile from pericarp of litchi and longan to the mated females were 72% and 60% respectively. For mated males, the attractive rates of volatiles from host plant tissue were less than 32%. The results indicated that the taxis of C. sinensis to host volatiles varied according to sex, mated status and plant tissues extractive. C. sinensis tended to be attracted to volatiles from the pulp of the host plants before mating,but to volatiles from the pericarp after mating.