| 红三叶白粉病危害损失通径分析及经济阈值的数学模型 |
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| 引用本文： | 袁庆华,蒋文兰.红三叶白粉病危害损失通径分析及经济阈值的数学模型[J].草业科学,1991(5). |
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| 作者姓名： | 袁庆华 蒋文兰 |
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| 作者单位： | 甘肃农业大学草原系，甘肃草原生态研究所 兰州 730070，兰州 730020 |
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| 摘 要： | 本文在红三叶白粉(Erysiphe Polygoni DC.)病情田间调查的基础上,分析了发病率、严重度、病情指数与产量损失之间线性关系,并由此建立了红三叶白粉病防治的经济阈值模型。这一模型可为当地红三叶白粉病的防治提供参考。
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| 关 键 词： | 红三叶白粉病 通径分析 经济阈值 |
PATH COEFFICIENT ANALYSIS OF EFFECTS OF POWDERY MILDEW ON THE GROWTH OF RED CLOVER AND ITS ECONOMIC THRESHOLD MODEL |
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| Yuan Qinghua and Jiang Wenlan.PATH COEFFICIENT ANALYSIS OF EFFECTS OF POWDERY MILDEW ON THE GROWTH OF RED CLOVER AND ITS ECONOMIC THRESHOLD MODEL[J].Pratacultural Science,1991(5). |
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| Authors: | Yuan Qinghua and Jiang Wenlan |
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| Abstract: | Based on a field investigation of red clover powdery mildew (Erysiphe polygoni DC.), the linear relationship between the dry matter yield and disease incidence, disease severity and damage index were established by the path coefficient analysis, and a model of economic threshold for the disease control was developed. The model would be helpful to make decision on the disease control. |
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| Keywords: | Red clover powdery mildew path analysis economic threshold |
| 本文献已被 CNKI 等数据库收录！ |
