荞麦叶甲姬小蜂生物学特性研究

A PRELIMINARY STUDY ON BIONOMICS OF ASECODES SUZUKII KAMIJJO

荞麦叶甲姬小蜂田间寄生率高，６月份调查平均寄生率为２７．３２％，７月１５日调查寄生率高达６０％。５～７月间，室内饲养５代。２７℃下饲养，个体发育历期分别为：卵期２．３ｄ，幼虫期５．７ｄ，预蛹期为１ｄ，蛹期３．８ｄ，成虫期４ｄ。该蜂能寄生荞麦叶甲的各个龄期。以４龄幼虫最高，每雌蜂一生能寄生幼虫４．９头，产仔蜂数平均为３０．９头。

Asecode suzukii Kamijo in an important parasitoid of gallerucella griseses Joann.Infields,the parasitic ratio of G. griseses by A.Suzukii occurred in June was 27.3%,but onJuly 15 was 60%。From May to July the parasitoid completed 5 generations.Under Iaboratorycondition of 27℃,the main development stages of egg,Iarval,prepupa,and pupal Iasted 2.3,5.7,1 and 3.8 days,respectively.The average aduld Iongevity of the parasitoid was 4 days orso.All Iarvae stages of the host were parasited by the wasp. In the Iaboratory,the 4th instarIarvae of the female wasp parasited on average of 4.9 Iarvaes in its Iife span,and ploduced30.9 offsprings.