| 棉田玉米螟危害损失及经济阈限研究 |
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| 引用本文： | 曹雁萍,邵晓泉.棉田玉米螟危害损失及经济阈限研究[J].中国农业科学,1994,27(4):53-59. |
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| 作者姓名： | 曹雁萍 邵晓泉 |
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| 作者单位： | 江苏省农业科学院植物保护研究所，南京 210014 江苏省如皋市植物保护站 |
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| 基金项目： | 国家“八五”攻关资助项目 |
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| 摘 要： | 根据棉田玉米螟扩散危害行为及其卵块在棉田内的空间分布，以考察不同含卵样点所造成的棉花受害数量，研究了棉田内不同玉米螟卵块密度与棉花受害各器官数量关系，并建立了数学回归模型。同时，系统测定了棉花受害的器官所造成的产量损失，得出二代玉米螟蛀食棉茎平均损失2.14个铃,单株皮棉减产3.85g；二、三代蛀食过的棉铃单铃损失皮棉分别为1.69g和1.58g。据此，提出了棉田玉米螟危害经济允许损失水平（EIL）：二代为百株3.72块卵,三代为百株4.97块卵,为棉田玉米螟化学防治提供了科学依据。
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| 关 键 词： | 玉米螟 棉花 危害损失 经济阈限 |
STUDIES ON THE DAMAGE AND ECONOMIC INJURY LEVELS OF ASIAN CORN BORER IN COTTON FIELD |
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| Gao Yanping, Shao Xiaoquan, Wang Xueping, Shu chune, Zhang Yongxiao.STUDIES ON THE DAMAGE AND ECONOMIC INJURY LEVELS OF ASIAN CORN BORER IN COTTON FIELD[J].Scientia Agricultura Sinica,1994,27(4):53-59. |
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| Authors: | Gao Yanping Shao Xiaoquan Wang Xueping Shu chune Zhang Yongxiao |
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| Abstract: | Based on the investigations on dispersion and damage behaviors of Asian corn borer Ostrinia furnacalis Guenee, spatial distribution of its egg mass in cotton field and the damaged amounts of cotton in the samples possessed different egg mass numbers,the relationships between egg mass densities and damaged organ numbers of cotton were studied, and several regression models were developed. Meanwhile, the cotton yield loss caused by the damage on various cotton organs were systematically tested, and the mean losses per cotton plant by the 2nd generation O. furnacalis were determined as 2. 14 bolls or 3.85 g of lint; and the lint loss per boll caused by its 2nd and 3rd generations were 1. 69g and 1. 58g, respectively. Accordingly, the economic injury levels of the 2nd and 3rd generations O.furnacalis were derived as 3.72 and 4.97 egg maeses/100 Platns. |
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| Keywords: | Asian corn borer Cotton Damage Economic injury level |
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