四种天敌对麦双尾蚜的功能反应

一种蚜小蜂 Aphelinus sp. 对麦双尾蚜Diuraphis noxia (Mordvilko) 的功能反应为Holling I型，直线方程为N_a=0.6060N-3.4700。七星瓢虫 Coccinella septempunctata L. 成虫对麦双尾蚜功能反应也为I型，直线方程为N_a=0.6020N+5.9000；多异瓢虫 Hippodamia variegata Goeze成虫和斑腹蝇 Leucopis annulipes Zett. 3龄幼虫对麦双尾蚜的功能反应均为II型，关系式分别为1/N_a=1.2550/N+0.0046和1/N_a=1.3280/N+0.0071。

FUNCTIONAL RESPONSES OF NATURAL ENEMIES TOTHE RUSSIAN WHEAT APHID

The functional responses of four species of natural enemies to the Russian wheat aphid (RWA), Diuraphis noxia (Mordvilko), were examined in laboratory in Xinjiang Uygur Autonomous Region. The responses of Aphelinus sp. And Coccinella septempunctata to RWA was showed to be the Holling I type and could be fitted by Na=0.6060N-3.4700 (n≤100) and N_a=0.6020N+5.9000 (n≤250) respectively, where N_a is number of the aphids attacked and N, the initial number of the aphids. The predation of Hippodamia variegata and Leucopis annulipes on the aphid could be well described by Holling II type, with the models as 1/N_a=1.2550/N+0.0046 and 1/N_a=1.3280/N+0.0071 respectively.