假眼小绿叶蝉卵的寄生蜂种类及种群动态

通过田间采梢、室内镜下查卵和饲养观察,初步获得假眼小绿叶蝉Empoasca vitis Gthe卵寄生蜂2种,分别隶属于三棒缨小蜂属Stethynium sp.和裂骨缨小蜂属Schizophragma sp.,其中三棒缨小蜂属Stethyniumsp.是优势种。2种缨小蜂的寄生动态调查结果显示,除8月和12月寄生率较低外,其它月份的自然寄生率都在30%以上,特别是10~11月寄生率最高达65%,对小绿叶蝉的虫口数量具有重要控制作用,值得进一步研究和保护利用。

The egg parasitoids of the small green leafhopper, Empoasca vitis, and their population dynamics

By dissecting the eggs of the small green leafhopper, Empoasca vitis Gthe, collected from tea shoots and by rearing the parasitized eggs in laboratory, we found 2 species (Stethynium sp. and Schizophragma sp.) of Mymaridae in Fujian. Among the 2 parasitoid species collected, Stethynium sp. was the dominant species.The egg parasitism rates of the two species, except in August and December, were all above 30%, with a highest peak(up to 65%) during October to November. These mymarid parasitoids were important for controlling the small green leafhopper and deserved to be protected and further utilized.