| 稻纵卷叶螟防治指标的研究 |
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| 引用本文： | 吴中孚,尤民生,周乐峰. 稻纵卷叶螟防治指标的研究[J]. 植物保护学报, 1990, 17(1): 17-22 |
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| 作者姓名： | 吴中孚 尤民生 周乐峰 |
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| 作者单位： | 福建农学院植物保护系，福建农学院植物保护系，福建农学院植物保护系 福建省农业厅植保处 |
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| 摘 要： |
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| 关 键 词： | 水稻 稻纵卷叶螟 防治指标 |
STUDIES ON THE ACTION THRESHOLD OF RICE LEAF ROLLER (CNAPHALOCROSIS MEDIRALIS GUENEE) |
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| Wu Zhongfu,You Minsheng and Zhou Lefeng. STUDIES ON THE ACTION THRESHOLD OF RICE LEAF ROLLER (CNAPHALOCROSIS MEDIRALIS GUENEE)[J]. Acta Phytophylacica Sinica, 1990, 17(1): 17-22 |
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| Authors: | Wu Zhongfu You Minsheng Zhou Lefeng |
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| Affiliation: | Department of Plant Protection, Fujian Agricultural College,Department of Plant Protection, Fujian Agricultural College and Department of Plant Protection, Fujian Agricultural College |
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| Abstract: | In this paper,the relationships between larval density of rice leaf roller Cnaphalocrocis medinalis Guenée,in jury of rice plant,and rice yield loss was studied in Fuzhou suburb,Fujian Province.The results showed that the rice yield losses caused by each third,fourth,and fifth instar larva were 0.188,0.180,and 0.235g,respectively.Based on the synthetic consideration of economic principle that the benifit must not be less than the cost of control,and effects of a series of natural and social factors,the action threshold of rice leaf roller was determined as 13370 eggs/mu or 6574 lst-2nd larvae/mu,according to the data analysis of the natural population life table of this insect. |
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| Keywords: | Cnaphalocrosis medinalis action threshold |
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