| 杨十斑吉丁虫危害的损失量及防治对策的研究 |
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| 引用本文： | 刘复玳 李鸿纲. 杨十斑吉丁虫危害的损失量及防治对策的研究[J]. 甘肃农业大学学报, 1991, 26(4): 402-408 |
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| 作者姓名： | 刘复玳 李鸿纲 |
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| 作者单位： | 甘肃农业大学林学系，甘肃酒泉地区森防站，甘肃酒泉地区森防站 |
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| 摘 要： | 本文对杨十斑吉丁虫(Melanophila decastigma Fabricius)损失量和防治对策进行了探讨。根据虫口密度和危害后所造成的材损率大小和树高、胸径生长量的影响程度,将危害情况以株均虫口密度分为五个水平的防治指标:0级(2头/株以下);Ⅰ级(3～lO头/株);Ⅱ级(11～20头/株),Ⅲ级(21～30头/株);Ⅳ级(30头/株以上)。针对不同危害情况提出了相应的控制危害的防治策略和方法。
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| 关 键 词： | 杨十斑吉丁虫 损失量 危害等级 材损率 |
The Loss Quantities of Melanophila Decastigma Fabricius and Its Control |
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| Liu Fudai. The Loss Quantities of Melanophila Decastigma Fabricius and Its Control[J]. Journal of Gansu Agricultural University, 1991, 26(4): 402-408 |
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| Authors: | Liu Fudai |
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| Abstract: | This paper is concerned with the loss caused by melanophila decastigma fabricius and the measures for its control. Based on the influence on timber loss rate, tree height and diameter breasthigh, the larva density was divided into five classes 0: less than 2/ind Ⅰ: 3～10/ind Ⅱ: 11～20/ind Ⅲ: 21～30/ind Ⅳ: over 30/ind The prevention tactics and different control methods Were taken in the light of the harm of this insect. |
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| Keywords: | melaophila decastigma fabricius loss quantities grade of harmfulness timber lss rate |
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