美国杏李园害虫和天敌群落相互作用关系研究

Interactional Relations between Pests and Their Natural Enemy Communities in American Apricot Plum Orchard

在美国杏李园生态系统天敌亚群落中,草蛉类的数量占优势,同时在绣线菊蚜大发生的5-7月,草蛉类、蜘蛛类种群密度较高,瓢虫类的关联度明显高于其它两类,是绣线菊蚜的优势天敌种类,这三类共同控制了绣线菊蚜的数量。天敌与绣线菊蚜的同域效应高,对绣线菊蚜有较强的追随作用,抑制着绣线菊蚜种群数量的增长。异色瓢虫、龟纹瓢虫、多异瓢虫是美国杏李园内的瓢虫类的优势种群。

The amount of Chrysopidae predominates in subcommunity of natural enemy in American apricot plum orchard. When Aphis citricola outbreak from May to July, the population density of Chrysopidae and Araneida are high, and the correlation of Coccinellidae is obviously higher than that of Chrysopidae and Araneida. The Chrysopidae, Araneida and Coccinellidae co-control the amount of Aphis citricola, which are the dominant species of natural enemy of Aphis citricola. These natural enemies will follow the Aphis citricola tightly, so they could inhibit the increasing of amount of Aphis citricola communities. Harmonia axyridis, Propylea japonica and Hippodamia variegata are the dominant species of Coccinellidae in American apricot plum orchard.