蝇蛹俑小蜂卵巢发育的研究

Ovarian development in Spalangia endius Walker(Hymenoptera:Pteromalidae)

对寄生蜂卵巢发育的研究是生理学和生物防治的重要基础。本文研究了从瓜实蝇蛹刚羽化至死亡的蝇蛹俑小蜂雌蜂的卵巢发育。结果表明蝇蛹俑小蜂内生殖系统由1对卵巢、1对侧输卵管、中输卵管、受精囊、受精囊腺等组成,羽化后卵巢迅速发育,卵巢指数从0.34 mm^2增大到0.48 mm^2,卵粒数从37.67增加到42.67。雌蜂发育4 d后,卵巢逐渐萎缩,卵巢指数、卵粒数减少。本研究得出2日龄雌蜂繁殖力最强,对评估蝇蛹俑小蜂品质和放蜂时间有潜在应用价值,使其能在生物防治过程中发挥更大的潜能。

The knowledge on ovarian development in parasitoids is important for basic studies on physiology and applied biological control. The ovigeny pattern of the parasitoid Spalangia endius Walker（Hymenoptera： Pteromalidae） females emerged from Bactrocera cucurbitae Coquillett pupae（Diptera：Tephritidae） were studied from newly-emerged to death. The reproductive system of S. endius larvae have a pair of ovaries,lateral collateral tubal,middle fallopian tubes,fertilized sac,and fertilized cysts.The ovaries developed faster that ovarian index from 0. 34 mm^2 to 0. 48 mm^2 after ovulation. The ovary index and fecundity were highest in first two days. Four days after eclosion,ovaries gradually atrophy,ovarian index,the number of eggs decreased. Two-day-old females＇ fecundity was best. This study has a potential value in assessing the quality of S. endius and the time of placing bears,so that it can play a greater potential in the process of biological control.