| 七星瓢虫对松大蚜和棉蚜的选择效应 |
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| 引用本文： | 杨惠玲.七星瓢虫对松大蚜和棉蚜的选择效应[J].东北林业大学学报,2010,38(8). |
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| 作者姓名： | 杨惠玲 |
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| 作者单位： | 山西省太原市林科所,太原,030003 |
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| 摘 要： | 七星瓢虫(Coccinella septempunctata Linnaeus)是我国常见重要捕食性天敌之一,为更好评价七星瓢虫在油松林生态系统中的捕食状况,以利于在生产中有效的应用,在一定空间范围内,观测了七星瓢虫对松林生态系统中油松和荆条上2种蚜虫——松大蚜(Cinara pintabulaeformis)和棉蚜(Aphis gossypii)的选择指数。结果表明,在棉蚜种群数量明显高于松大蚜的种群数量时,七星瓢虫明显喜好捕食棉蚜;在松大蚜种群数量明显高于棉蚜时,则喜好捕食松大蚜;在2种蚜虫种群数量相近,或者松大蚜种群数量略高于棉蚜时,七星瓢虫仍较喜好捕食棉蚜。
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| 关 键 词： | 七星瓢虫 松大蚜 棉蚜 选择指数 |
Selective Effect of Coccinella septempunctata to Cinara pintabulaeformis and Aphis gossypii |
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| Yang Huiling.Selective Effect of Coccinella septempunctata to Cinara pintabulaeformis and Aphis gossypii[J].Journal of Northeast Forestry University,2010,38(8). |
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| Authors: | Yang Huiling |
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| Institution: | Yang Huiling(Taiyuan Forestry Research Institute,Taiyuan 030003,P.R.China) |
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| Abstract: | An experiment was conducted to study the selective effects of seven-spotted ladybugs (Coccinella septempunctata Linnaeus) to Cinara pintabulaeformis and Aphis gossypii in order to evaluate the prey choice of C.septempunctata in Pinus tabuliformis forests.Results show that the selection coefficient of the seven-spotted ladybugs varies with the change in population dynamics of C.pintabulaeformis and A.gossypii.When the amount of A.gossypii is higher than that of C.pintabulaeformis,the ladybugs exhibit clear s... |
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| Keywords: | Coccinella septempunctata Cinara pintabulaeformis Aphis gossypii Selection coefficients |
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