取食不同种类糖对中红侧沟茧蜂寿命和卵成熟的影响

Effects of different sugars on longevity and egg mature of Microplitis mediator

为了阐明取食糖类食物与中红侧沟茧蜂寿命和卵成熟的关系,本研究比较了取食葡萄糖、果糖、蔗糖、麦芽糖和甘露糖对中红侧沟茧蜂寿命和卵成熟的影响。结果显示:与饲喂清水对照相比,取食蔗糖、葡萄糖、果糖、麦芽糖的寄生蜂寿命显著延长,雌蜂分别为17.6 d,15.6 d,14.4 d和10.3 d;雄蜂分别为7.6 d,11.0 d,11.3 d和6.6 d。取食5种糖雌蜂的寿命均显著高于雄蜂。解剖中红侧沟茧蜂的卵巢发现:初羽化的卵巢中成熟卵约占总卵量的13%,平均为7.13粒。取食不同糖类物质的雌蜂卵巢中成熟卵均呈现先显著上升后逐步下降的趋势,但取食不同糖的成熟卵形成的高峰期时间不同。研究结果为提高该蜂的繁殖潜能和繁殖效率提供依据。

Effects of different sugar resources on the longevity and egg mature of Microplitis mediator,a larval synovigenic endoparasitoid,were compared in our experiment. The results showed that both food and sex affected longevity of this wasp. The longevity of female wasps feeding on sucrose,glucose,fructose and maltose was 17. 6 d,15. 6 d,14. 4 d and 10. 3 d,respectively,which was significantly longer than feeding on the water control; the longevity of male wasps feeding on these sugars was 7. 6 d,11. 0 d,11. 3 d and 6. 6 d,respectively,which was significantly longer than feeding on control,too. The longevity of female wasps was longer than that of male wasps under the same conditions. Newly emerged female beard 13% mature eggs in their ovaries,and the average mature eggs were 7. 13. When the parasitoids fed on the five different sugars,the number of mature eggs and the total number of eggs including immature and mature eggs significantly increased and declined gradually subsequently. Meanwhile,the peak time of the number of mature eggs varied among the different diets. Our results aimed to promote the reproduction potency and efficiency of this parasitoid.