各种天敌对麦长管蚜和麦二叉蚜种群数量影响程度的研究

Influence of Natural Enemies on Population of Wheat Aphid and Greenbug

本文利用灰色系统理论 ,对 1 993— 1 996年两种麦蚜的种群数量及其天敌的捕食总量之间的追随关系进行分析 ,并研究各种天敌与理想优势种天敌之间的联系程度 ,结果显示 ,麦长管蚜的优势种天敌是食蚜蝇、龟纹瓢虫、蚜茧峰和草间小黑蛛 ;对麦二叉蚜种群数量影响大的主要天敌是草间小黑蛛、龟纹瓢虫。

Based on the grey system theory,the relationships between total predacious number of enemies and wheat aphid,and the relationships between enemies and their superior natural enemies were studied.The results showed that Sgrphidae,Propylaca japonica,Aphididae and Erigonidium graminicola were the natural enemies which greatly influenced the populations of wheat aphid and greenbug.