【摘要】 应用生命表技术分析了玉米螟赤眼蜂(TrichogrammaostriniaePangetChen)在不同寄主繁育条件[分别用米蛾(CorcyracephalonicaStainton)(RM)卵和小菜蛾(PlutellaxylostellaL.)(DBM)卵繁育]下对小菜蛾卵的寄生潜能分析,结果表明:玉米螟赤眼蜂在小菜蛾卵上显示出较好的适应性,具有较大的应用前景;在不同寄主繁育条件下,玉米螟赤眼蜂对小菜蛾卵的寄生潜能以米蛾卵所繁的成蜂的各项寄生特性参数(内禀增长率rm、每雌寄生卵量、净生殖力R0、平均世代历期T和雌蜂寿命)均优于用小菜蛾卵所繁蜂,米蛾卵是其适宜的中间寄主;长期用小菜蛾卵繁育玉米螟赤眼蜂,一定程度上削弱了玉米螟赤眼蜂的生活力,降低了其对目标寄主的攻击性,有关其田间转寄主繁育问题值得深入探讨.更多还原

【Abstract】 The reproductive potential of Trichogramma ostriniae Pang et Chen developed in the eggs of diamondback moth (T.ostriniae in DBM) were compared with those (T.ostriniae in RM) developed in the eggs of rice moth (RM), Corcyra cephalomica by rearing with diamondback moth (DBM) eggs with the method of life table. The results showed that T.ostriniae had a high host preference to the DBM eggs and was considened as a suitable parasitoid for controlling DBM. Its reproductive properties parameters (rm, number of eggs laid per female, the net reproduction rate R0, the longevity of female adult) of T.ostriniae in RM were more suitable than those of T.ostriniae in DBM. Corcyra cephalomica eggs were the suitable alternative hosts for T.ostriniae; The reproductive potential of T.ostriniae would be weakened in its target hosts when developping in DBM eggs continuously.更多还原