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| 早稻穗期白背飞虱为害损失及防治指标研究 | |
| 引用本文： | 叶正襄 秦厚国. 早稻穗期白背飞虱为害损失及防治指标研究[J]. 中国水稻科学, 1993, 7(1): 21-24 |
| 作者姓名： | 叶正襄 秦厚国 |
| 作者单位： | 江西省农业科学院，江西省农业科学院，江西省农业科学院，江西省农业科学院 南昌 330200，南昌 330200，南昌 330200，南昌 330200 |
| 摘 要： | 笼罩接虫试验丧明，早稻穗期产量损失(Y )与每丛白背飞虱数量(x)的关系符台方程： Y=14.0835+10.9425X士28.95。 产量损失的主导原因是水稻受害后秕谷率增加。根据目前稻谷价格、防治费用等，导出白背飞虱防治指标为每丛l12～16头。经大田验证，与实际基本相符。 |
| 关 键 词： | 白背飞虱 产量 防治 为害 早稻 |
| 收稿时间： | 1900-01-01; |
Yield Loss Caused by Whitebacked Planthopper and Its Economic Threshold at Heading Stage of Early Rice |
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| YE Zhengxiang,QIN Houguo,HUANG Ronghua,LI Hua. Yield Loss Caused by Whitebacked Planthopper and Its Economic Threshold at Heading Stage of Early Rice[J]. Chinese Journal of Rice Science, 1993, 7(1): 21-24 | |
| Authors: | YE Zhengxiang QIN Houguo HUANG Ronghua LI Hua |
| Abstract: | The cage experiment indicated that the relationship between the yield loss (Y) and the number of whitebacked planthopper, Sogatella furcifera per hill (X) at the heading stage of early rice coincided with the following equation: Y=14.0835+10.9425X±28.95. The main reason of yield loss was the increase of the rate of unfilled gram in intested rice. According to the present price of grain and the control cost etc., the economic threshold of S. furcifera was about 12-16 nymphs per hill, which was verified to accord with the practice basically in the field. |
| Keywords: | Economic threshold Sogatella furcifera Yield loss |
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