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期 刊 ：植物保护学报 1999年

关键词：菜蛾绒茧蜂；小菜蛾；寄主发育；取食量；寄主选择性；

Keywords:Cotesia plutellae, Plutella xylostella, host age preference, host development, food consumption,

摘 要 ：研究了菜蛾绒茧寄生对寄主幼虫龄期的选择性及对寄主生长发育、取食量的影响。结果表明，该蜂能寄生小菜蛾各个龄期的幼虫，但当２－４龄幼虫同时存在时，偏爱寄生２、３龄幼虫，对２、３、４龄幼虫的选择系数分别为０．３７、０．３９、０．２４。该蜂对４龄幼虫的寄生能力随寄主日龄增大而急剧下降，对进入４龄并发育至该龄期４０％时间以上的幼虫不能寄生。产卵寄生的雌蜂比例也随４龄幼虫日龄增大而急剧下降。小菜蛾幼虫被寄主后

Abstract:The parasitism preference of Cotesia plutellae Kurdjumov to different larval instars of diamondback moth (DBM), Plutella xylostella (Linnaeus) and four development ages of its 4th instar, and the effect of parasitism on the development and food consumptio

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