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作 者 ：荆英,黄建,韩巨才,马瑞燕

期 刊 ：生态学报 2004年 24卷 2期 页码：292~296

关键词：小黑瓢虫；烟粉虱；红蜘蛛；作用系统；选择捕食；

Keywords:Delphastus catalinae （Horn）, Bemisia tabaci （Gennadius）, Tetranychus nr. fijiensis, interactive system, selective predation,

摘 要 ：研究了小黑瓢虫与烟粉虱及红蜘蛛两种猎物作用系统中 ,小黑瓢虫雌成虫对两种猎物卵的选择捕食作用。结果表明 :当两种猎物共存时 ,小黑瓢虫雌成虫对烟粉虱卵在低密度下不表现喜好性 ,而在中等密度和高密度下表现正喜好性 ,对红蜘蛛卵在各密度下均不表现喜好性。对烟粉虱卵的转换效应会由于总猎物密度的不同而呈现不同的效应 ,即在低密度 (15 0粒 )时无转换行为 ,在中等密度 (30 0粒 )时有负转换行为 ,在高密度 (6 0 0粒 )时有正转换行为。而对红蜘蛛卵则在各总猎物密度下均呈现负转换效应。同时组建了两种猎物共存时 ,小黑瓢虫雌成虫对猎物的总捕食作用方程及对每一种猎物类型的捕食作用方程 ,分析了两种猎物共存时 ,小黑瓢虫雌成虫对各猎物寻找效应的变化情况。

Abstract:Delphastus catalinae (Horn) (formerly known as Delphastus pusillus (LeConte)) (Coleoptera: Coccinellidae) is the most important predator of Bemisia tabaci (Gennadius), which has become a major pest in numerous crops all over the world. It was introduced into China in order to combat B. tabaci in 1996, and inhabited successfully from then on. During the course of our study, we noticed that besides B. tabaci, the ladybird could also consumed Tetranychus nr. fijiensis. In spring and autumn, B. tabaci and T. n...

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