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杭州郊区小菜蛾寄生昆虫调查
引用本文:汪信庚,刘树生,何俊华,郭世俭.杭州郊区小菜蛾寄生昆虫调查[J].植物保护学报,1998,25(1):20-26.
作者姓名:汪信庚  刘树生  何俊华  郭世俭
作者单位:浙江农业大学植物保护系,浙江农业大学植物保护系,浙江农业大学植物保护系,浙江省农业科学院植物保护研究所 杭州 310029,杭州 310029,杭州 310029,杭州
基金项目:澳大利亚国际农业研究中心资助项目(ACIAR PN9213)
摘    要:1989~1996年,在杭州郊区调查了十字花科蔬菜小菜蛾的寄生昆虫天敌种类和被寄生率,共发现6种原寄生天敌,即赤眼蜂Tichogramma.sp.菜蛾绒茧蜂Cotesiaplutellae,颈双缘姬蜂Diadromuscollaris,菜蛾啮小蜂Oomyzussokolowskii,螟蛉埃姬蜂Itopleticnaranyae,无脊大腿小蜂Brachymeriaexcavinata.以及7种菜蛾绒

关 键 词:小菜蛾  寄生昆虫种类  寄生率

INVESTIGATIONS ON PARASITOIDS OF DIAMONDBACK MOTH IN THE SUBURB AREAS OF HANGZHOU
Wang Xingeng,Liu Shusheng,He Junhua and Guo Shijian.INVESTIGATIONS ON PARASITOIDS OF DIAMONDBACK MOTH IN THE SUBURB AREAS OF HANGZHOU[J].Acta Phytophylacica Sinica,1998,25(1):20-26.
Authors:Wang Xingeng  Liu Shusheng  He Junhua and Guo Shijian
Institution:IN THE SUBURB AREAS OF HANGZHOU;Wang Xingeng Liu Shusheng He Junhua;(Department of Plant Protection, Zhejiang Agricultural University, Hangzhou );Guo Shijian;(Institute of Plant Protection, Zhejiang Academy of Agricultural Sciences, Hangzhou )
Abstract:In 1989 - 1996, the species and parasitization of the parasitoids on diamond-back moth (DBM), Plutella xylostella L. , in crucifer fields in the suburbs of Hangzhou were investigated. Six parasitic species, i. e. , Trichogramma sp. , Cotesia plutellae Kurdjumov, Diadromus collaris (Graverhorst) , Oomyzus sokolowskii Kurdjumov, Ito-plectis naranyae (Ashmead), Brachymeria excarinata Gahan, and seven hyperparasitic species, i. e. , Eurytoma verticillata (Fabricius), O. sokolowskii, Ceraphron maonilae Ashmead, Trichomalopsis apantloctenus (Crawford), T. shiraki Crawford, Trichoma-lopsis sp. 1 and Trichomalopsis sp. 2 were found. Rates of parasitization in the egg stage of DBM were low. However, rates of parasitization in the larval and pupal stages were substantial, and showed two peaks each year in June-July and October -November respectively. During the peaks the rates of parasitization were usually in the range of 20% - 60%, with the highest to over 80%. C, plutellae, D. collaris and O. sokolowskii were dominant. In the field, C. plutellae was found all year round; O. sokolowskii was active from May to October, entered in a quiescent state at the prepupal stage in October-November to overwinter and emerged April -May next year; D. collaris showed relatively high rates of parasitization only from May to July, and was seldom found in other seasons. It was found that rates of parasitization of DBM in turnip and mustard fields were usually higher than those in cabbage and Chinese cabbages fields. It was also found that there were negative correlation of the rates of parasitization between the two major larval parasitoids, C. plutellae and O. sokolowskii, indicating that there may be certain competition between the two species.
Keywords:Plutella xylostella  parasitoid  rates of parasitization  
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