深点食螨瓢虫对桔全爪螨的捕食作用

predation of Stethorus Punctillum on Panonychus Citri

本文详细地研究了深点食螨瓢虫的各有效虫态对桔全爪螨各螨态的捕食作用及其与温度的关系。结果表明，该瓢虫的捕食量大，主要捕食虫态是三、四龄幼虫和成虫，功能反应类型均属ＨｏｌｌｉｎｇⅡ型，在１９～３１℃范围内捕食作用随温度的升高而增大。４龄幼虫对桔全爪螨各螨态的捕食选择顺序为：幼螨或卵—若螨—成螨。

This paper gives detailed information about the predation of each effective stage of Stethorus Punctillum on each stage of Panonychus citri and relationship between the predation and temperature. Results indicate the predation amounts of this ladybeetle is big, main predatory stages are the third instar larvae, the fourth instar larvae and adults: types of functional response all belong to Holling Ⅱ;predatory effect goes up with the rising of temperature within 19￣31℃;selective order of predation of the fourth instar larvae of Stethorus punctillum on each stage of panonychus citri is egg or larva-nymph-adult.