转Bt基因水稻对两种弹尾虫及尖钩宽黾蝽捕食作用的影响

转Bt基因水稻KMD1、KMD2和对照水稻XS11稻田主要有两种弹尾虫：灰橄榄长角跳虫Entomobryagriseoolivata (Packard) 和钩圆跳虫 Bourletiella christianseniBanks。两种Bt稻田中灰橄榄长角跳虫种群密度均显著高于对照XS11稻田；在以KMD1和KMD2腐烂茎叶为食的灰橄榄长角跳虫成虫中检测到微量Cry1Ab杀虫蛋白。室内测定结果表明，不管是单头捕食还是多头协同捕食，尖钩宽黾蝽Microvelia horvathi Lundblad 成虫对用3种供试水稻残体饲养的灰橄榄长角跳虫的捕食量和功能反应均符合HollingⅡ型方程，其日捕食量、瞬时攻击率（a）和处理时间（T_h）均无显著差异。

Impacts of transgenic cry 1Ab rice on two collembolan species and predation of Microvelia horvathi ( Hemiptera : Veliidae)

Two collembolan species were collected from paddy fields and identified as Entomobrya griseoolivata (Packard) and Bourletiella christianseni Banks. Population densities of E. griseoolivatain Bt rice field were significantly higher than that in the control, the XS11 rice field. Cry1Ab insecticidal protein was detected in theE. griseoolivata fed with Bt rice (KMD1 and KMD2) litter in the laboratory. Results from the laboratory studies on predation and functional responses by Microvelia horvathi Lundblad adults showed that all the functional responses of the predator toE. griseoolivata fed with the litter of either Bt rice or the control rice XS11, whether by single or three M. horvathiadult(s), followed the Holling Ⅱ type response. The daily predation, instantaneous attacks constant and handling times of them were not significantly different.