四种天敌对麦双尾蚜的功能反应

FUNCTIONAL RESPONSES OF NATURAL ENEMIES TO THE RUSSIAN WHEAT APHID

一种蚜小蜂Ａｐｈｅｌｉｎｕｓｓｐ ． 对麦双尾蚜Ｄｉｕｒａｐｈｉｓ ｎｏｘｉａ （Ｍｏｒｄｖｉｌｋｏ） 的功能反应为ＨｏｌｌｉｎｇＩ型， 直线方程为Ｎａ ＝ 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Ｎａ ＝ ０－６０２０Ｎ＋ ５－９０００ ； 多异瓢虫Ｈｉｐｐｏｄａｍｉａ ｖａｒｉｅｇａｔａ Ｇｏｅｚｅ成虫和斑腹蝇Ｌｅｕｃｏｐｉｓａｎｎｕｌｉｐｅｓ 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／ Ｎａ ＝ １－２５５０／ Ｎ＋ ０－００４６ 和１／ Ｎａ ＝ １－３２８０／ Ｎ＋ ０－００７１。

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 N a = 0 6060 N -3 4700 ( n ≤100) and N a = 0 6020 N +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.