| 水稻孕穗期稻茎毛眼水蝇经济阈值的研究 |
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| 引用本文： | 秦厚国,叶正襄,李华,罗任华.水稻孕穗期稻茎毛眼水蝇经济阈值的研究[J].植物保护,1997,23(6):12-15. |
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| 作者姓名： | 秦厚国 叶正襄 李华 罗任华 |
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| 作者单位： | 江西省农业科学院植物保护研究所 |
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| 摘 要： | 试验表明，水稻孕穗期每丛水稻茎毛眼水蝇卵数（Ｘ１）、被害穗数（Ｘ２）与产量损失（Ｙ）的关系符合下列方程：Ｙ＝－２．０１＋４．５２４Ｘ１±２．２，ｒ＝０．９９１４；Ｙ＝－０．０７６＋４．９１２Ｘ２±２．７８，ｒ＝０．９８６３。产量损失的主导因素是水稻受害后，早稻实粒数减少，晚稻总粒数和实粒数减少。根据防治费用，稻谷价格等，导出孕穗期稻茎毛眼水蝇的经济阈值为每丛禾１．９粒卵或１．３４株受害穗。经大田验证，与实际基本相符。
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| 关 键 词： | 水稻孕穗期 稻茎毛眼水蝇 产量损失 经济阈值 |
Economic Threshold of Hydrellia sasakii at Booting Stage of Rice. |
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| Qin Houguo Ye Zhengxiang Li Hua Luo Renhua ..Economic Threshold of Hydrellia sasakii at Booting Stage of Rice.[J].Plant Protection,1997,23(6):12-15. |
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| Authors: | Qin Houguo Ye Zhengxiang Li Hua Luo Renhua |
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| Institution: | Institute of Plant Protection;Jiangxi Academy of Agricultural Sciences;Nanchang 330200 |
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| Abstract: | The experiment results indicated that the relationships between the yield loss of rice (Y) and the egg density of Hydrellia sasakii (X1) and the damaged ear (X2) at the booting stage of rice fit the following equations:Y=-2.01+4.524 X1±2.2,r=0.991 4; Y=-0.076+4.912 X2±2.78, r=0.986 3. The main reasons of rice yield loss were that the fertile grain on early rice and the total grain and fertile grain on late rice were reduced, respectively. According to the present price of rough rice and control cost, the economic thresholds for controlling of Hydrellia sasakii were 1.9 eggs or 1.34 damaged ear per cluster. |
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| Keywords: | booting stage of rice Hydrellia sasakii |
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