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《Grassland and Turf》 2007-01
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Effect of Hippodamia tredecimpunctata and Hippodamia vaviegata predation on Therioaphis trifolii

JIA Biao1,HE Chun-gui1,YANG Shen-gwei1,QIAN Jin2(1.Prataculture College of Gansu Agricultural University,Lanzhou 730070,China;2.Pharmacy College of Shihezi University,Shihezi 832003,China)  
Effect of Hippodamia tredecimpunctata and Hippodamia vaviegata predation on Therioaphis trifolii was carried out by observing the influence of mutual interference among individual predators on predation rate of Hippodamia variegate and Hippodamia tredecimpunctata to Therioaphis trifolii,and two kinds of ladybug's functional response under the different density of Therioaphis trifolii as well.The result shows that predation rates of the two kind of ladybug's predation on Therioaphis trifolii are decreased with the increase of mutual interference among individual predators and could be described by Hassell-Varley's equation,the mutual interference among individual predator is obvious.The two kinds of ladybug's predation functional response are increased with the increase of prey's density.Mathematics mode theory data of interference action and functional response is much closed to its observed data.And the error is not notable(P0.05) by X2 test.
【Fund】: 2004年国家自然科学基金项目(30371745)
【CateGory Index】: S476.2
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