三种捕食性瓢虫成虫对卵的种内自残及其集团内捕食作用

发布时间：2019-03-23 19:30

【摘要】：捕食性瓢虫是农田生态系中一类重要的天敌昆虫,种内自残和集团内捕食现象在捕食性瓢虫中普遍存在。本研究在室内通过选择性和非选择性试验比较分析了异色瓢虫、七星瓢虫及龟纹瓢虫成虫对卵的种内自残和集团内捕食作用以及卵表面的化学物质对集团内捕食作用的影响。结果表明:在非选择性试验中,3种捕食性瓢虫成虫对卵表现出相似的取食现象,即对龟纹瓢虫卵取食最多,其次为七星瓢虫卵,对异色瓢虫卵取食相对较少;在选择性试验中,七星瓢虫和龟纹瓢虫较偏好取食同种卵,对异色瓢虫卵取食均较少;而异色瓢虫喜欢取食异种卵,对同种卵取食相对较少。3种瓢虫卵经正己烷漂洗后,异色瓢虫、七星瓢虫和龟纹瓢虫成虫却未对卵表现出取食偏好性。本研究可为捕食性瓢虫组合释放与协调利用、田间集团内捕食作用评定及其在生物防治中的应用提供理论依据。
[Abstract]:Predatory ladybug is a kind of important natural enemy insects in farmland ecosystem. The phenomena of intraspecific self-harm and intra-group predation are common in predatory ladybugs. In this study, selective and non-selective experiments were carried out to analyze the effects of different color ladybug, ladybird and ladybug adults on intraspecific and intraspecific predation of eggs, as well as the effects of chemical substances on egg surface on intra-cluster predation. The results showed that, in the non-selective experiment, three predatory ladybug adults showed similar feeding on eggs, that is, the most eggs were eaten on ladybird eggs, the next was ladybug eggs, and the eggs were less on different color ladybugs eggs. In the selective test, both ladybug and ladybug preferred to feed on the same species eggs, but less on the eggs of ladybird beetles. The eggs of three species of ladybug were washed with n-hexane, but the adults of ladybug, ladybird and ladybug showed no preference for egg feeding. 3 species of ladybug eggs were washed with n-hexane, but the adults of ladybird, ladybird and ladybug showed no preference for egg feeding. 3 species of ladybug eggs were washed with hexane. This study can provide a theoretical basis for the combination release and coordinated utilization of predatory ladybugs, the evaluation of predation in field groups and its application in biological control.
【作者单位】：潍坊科技学院;北京市农林科学院植物保护环境保护研究所;
【基金】：国家重点基础研究发展计划(973)项目(2013CB127600) 北京市博士后工作经费资助项目
【分类号】：S476.2

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