荔枝蛀蒂虫对寄主植物挥发油的行为反应

在室内利用Y形嗅觉仪测定了荔枝蛀蒂虫Conopomorpha sinensis Bradley对寄主植物不同组织挥发油的行为反应,结果表明:荔枝果肉挥发油和龙眼果肉挥发油对交配前荔枝蛀蒂虫的雌成虫引诱率最大,分别为76%和68%,而荔枝叶挥发油和龙眼叶挥发油对该虫的引诱率最低,分别为32%和40%.雌成虫交配后,荔枝果皮挥发油和龙眼果皮挥发油对其引诱最大,引诱率分别为72%和60%,雄成虫交配后,寄主不同组织挥发油对其引诱率均低于32%.可见,荔枝蛀蒂虫雌、雄成虫对寄主植物的不同组织挥发油的行为反应存在差异性,交配前和交配后的雌、雄成虫对寄主植物挥发油的选择也存在差异性.荔枝蛀蒂虫在交配前对寄主植物的果肉挥发油有明显的趋向反应,而交配后对寄主植物的果皮挥发油有明显的选择性.

Behavioral Response of Conopomorpha sinensis to Volatiles of Host Plants

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.