| 斜纹夜蛾天敌作用的评价 |
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| 引用本文： | 蒋杰贤,梁广文,庞雄飞.斜纹夜蛾天敌作用的评价[J].生态学杂志,1999,10(4):461-463. |
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| 作者姓名： | 蒋杰贤 梁广文 庞雄飞 |
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| 作者单位： | 华南农业大学农业部昆虫生态、毒理重点开放实验室, 广州 510642 |
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| 基金项目： | 国家博士点基金课题(960501). |
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| 摘 要： | 通过组建斜纹夜蛾第4代和第8代自然种群生命表,运用排除作用控制指数分析了生物因子对斜纹夜蛾种群的自然控制作用。结果表明,低龄(1～3龄)幼虫的捕食性天敌是影响斜纹夜蛾种群数量动态的重要因子。对第4代和第8代种群的排除作用控制指数分别为13.904和12.946.如果没有捕食性天敌的作用,下代种群数量将分别增长到当代的15.1206和74.678倍。病原微生物是影响第4代斜纹夜蛾种群数量的另一重要因子,其排除作用控制指数为2.4726.
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| 关 键 词： | 斜纹夜蛾 天敌作用 种群控制指数 |
| 收稿时间： | 1998-10-20 |
Effectiveness of natural enemies on Spodoptera litura |
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| Jiang Jiexian,Liang Guangwen,Pang Xongfei.Effectiveness of natural enemies on Spodoptera litura[J].Chinese Journal of Ecology,1999,10(4):461-463. |
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| Authors: | Jiang Jiexian Liang Guangwen Pang Xongfei |
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| Institution: | The Key Laboratory of Insect Ecology and Toxicology of Chinese Ministry of Agriculture, South China Agricultural University, Guanzhou 510642 |
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| Abstract: | The 4th and 8th generation life tables were applied to evaluate the effectiveness of natural enemies on common cutworm (Spodoptera litura) population by exclusion index of population control (EIPC). The results showed that the predatory natural enemies of the 1st, 2nd and 3rd instar larvae were the important factor influencing the population dynamics of common cutworm. The EIPCvalues of the 4th and 8th generation common cutworm were 13.904 and 12.496 respectively, which means that the next generation of common cutworm population would increase 15.1206 and 74.678 times of current generation if the predators were excluded. The pathogenic microbes were another important factor affecting the 4th generation population, and its EIPCwas 2.4726. |
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| Keywords: | Spodoptera litura Effectiveness of natural enemies Population control index |
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