| 李继平,金社林,胡冠芳,万安民.甘肃甘谷县麦蚜种群动态及防治指标初探[J].植物保护,1995,21(2):2-4. |
| 甘肃甘谷县麦蚜种群动态及防治指标初探 |
| A Preliminary Study on the Population Dynamics and the Economic Threshold of Wheat Aphids in Gangu Coun-ty, Gansu Province. |
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| DOI： |
| 中文关键词: 麦蚜，种群动态，防治指标 |
| 英文关键词:wheat aphids, population dynamics, economic threshold. |
| 基金项目: |
| 李继平 金社林 胡冠芳 万安民 |
| 甘肃省农科院植保所 兰州 730070;中国农科院植保所 |
| 摘要点击次数: 621 |
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| 中文摘要: |
| 本文通过1991～1994年甘谷县麦蚜田间系统调查和大田普查，明确了麦蚜的种群结构和消长动态及天敌与麦蚜的跟随关系。并建立了麦蚜混合种群数量与产量损失率的回归模型即Y＝0.3591+0.001897x，依次确定了小麦穗期混合麦蚜种群的防治指标为百株蚜量1000头。 |
| 英文摘要: |
| This paper deals with the population structure and dynamics of wheat aphids as well as the density-depondance relationship between wheat aphids and their natural enemies,and establishes the regression model ofmixed population of wheat aphids and relating yield loss, that is,Y=0.3591+0.001897X. The economicthreshold of mixed wheat aphids during the earing stage of wheat was proposed as 1000 aphids per 100 wheatplants. |
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