《环境昆虫学报》

作者	单位
赵静，肖达，张帆，王甦 *	（1 潍坊科技学院，山东寿光 262700 2 北京市农林科学院植物保护环境保护研究所，北京100089）

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中文摘要:

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。

英文摘要:

The aphidophagous ladybird beetles Harmonia axyridis , Coccinella septempunctataunctata and Propylea japonica are important predatory enemies in the agro-ecosystem. Intraspecific and interspecific predation (IGP) of eggs is a well documented phenomenon amongst the three coccinellids. In the current study, the intraspecific cannibalism and intraguild predation among H. axyridis , C. Septempunctata and P. japonica measurement was conducted in non-choice and choice tests in the laboratory. The role of egg surface chemicals on intraspecific cannibalism and intraguild predation were also examined. The main results were summarized as follows. In the non-choice test, the three coccinellid species showed the same predation pattern. All of them had their largest predation amount on P. Japonica eggs, second on C. septempunctata eggs and least on H.axyridis eggs. In the choice test, C. septempunctata and P. japonica prefered to eat conspecific eggs than heterospecific eggs while H.axyridis had significantly less conspecific egg predation and prefered to eat heterospecific eggs However, they did not show prefering to the eggs when the coatings of the three coccinellids eggs were removed using hexane. The research can offer the theoretical evidence for the scientific evaluation of IGP in the field, combinated releasing and coordination use of the three coccinellids in the future

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