Analysis on Attractive Activities of Volatile Constituents of Needles to Cephalica chuxiongnica

Previous researches showed that both females and males of Cephalica chuxiongnica (Hymenoptera: Pamphiliidae) could be attracted by crude extracts of Pinus yunnanensis needles. The taxis responses of C. chuxiongnica to the main volatile constituents of P. yunnanensis needle extract were tested in laboratory with Y-tube olfactometer, and the attractive activities of volatile constituents of P. yunnanensis needles extract to the C. chuxiongnica was analyzed. The findings indicated that the females exhibited significant tendency to (−)−β−pinene, myrene and β−caryophyllene, and males showed significant tendency to (+)−α−pinene, (−)−β−pinene and β−caryophyllene. (−)−β−pinene, myrene, and β−caryophyllene all captured a certain amount of females. (−)−β−pinene, myrene, β−caryophyllene, (+)−α−pinene and (+)−limonene captured significantly more males than females.