ABSTRACT

This study investigated the egg maturation rates and the effect of feeding and starvation on the egg load dynamics of Diachasmimorpha kraussii (Fullaway), a parasitoid of the Queensland fruit fly, Bactrocera tryoni (Froggatt). Three day old unfed parasitoids had significantly more mature eggs than 3-d old fed wasps. No egg resorption was observed in these parasitoids. When exposed to a physiologically suitable host, parasitoids had a higher egg load than those exposed to a physiologically unsuitable host. Manipulation of the wasp’s feeding status, or exposure to suitable hosts, might help improve the reproductive potential of this parasitoid if bred for inundative release.

摘要

本研究调查了卵成熟率以及进食和饥饿对Diachasmimorpha kraussii (Fullaway)卵负载动态的影响，这是一种昆士兰果蝇Bactrocera tryoni (Froggatt)的寄生蜂。三天大的未喂食的寄生蜂的成熟卵明显多于 3 天大的喂食黄蜂。在这些寄生蜂中没有观察到卵吸收。当暴露于生理上合适的宿主时，拟寄生物比暴露于生理上不合适的宿主具有更高的卵载量。控制黄蜂的摄食状态，或接触合适的宿主，可能有助于提高这种寄生蜂的繁殖潜力，如果是为了泛滥释放而繁殖的话。