| 一种预测小地老虎为害程度的经验指数--"蛾雨系数" |
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| 引用本文： | 周志成,陈永年. 一种预测小地老虎为害程度的经验指数--"蛾雨系数"[J]. 中国烟草科学, 2004, 25(2): 13-16 |
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| 作者姓名： | 周志成 陈永年 |
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| 作者单位： | 1. 湖南省烟草公司,湖南,长沙,410007
2. 湖南农业大学,湖南,长沙,410128 |
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| 摘 要： | 小地老虎[A grotis ypsilon(Rottemberg)]是湖南的一种重要烟草害虫,其第1代幼虫于4、5月为害烟株,卵和1-3龄幼虫对大风雨敏感.第1代虫口密度和烟草受害损失取决于越冬代蛾量及敏感虫期的降雨量.在6个病虫测报站进行了多年的系统性诱或灯诱蛾,结果得出,烟草断苗率与蛾雨系数有明显的正相关.蛾雨系数=性诱或灯诱蛾总量(2月20日至4月10日)/敏感虫期的降雨量(湘南一般为3月10日至4月10日,湘西4月20日至5月20日).此系数可用于烟草被害程度的测报.
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| 关 键 词： | 烟草 小地老虎 病虫发生预测 |
| 文章编号： | 1007-5119(2004)02-0013-04 |
| 修稿时间： | 2003-02-25 |
Forecasting tobacco loss by cutworm with "moth-rainfall coefficient" |
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| ZHOU Zhi-cheng,CHEN Yong-nian. Forecasting tobacco loss by cutworm with "moth-rainfall coefficient"[J]. Chinese Tobacco Science, 2004, 25(2): 13-16 |
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| Authors: | ZHOU Zhi-cheng CHEN Yong-nian |
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| Affiliation: | ZHOU Zhi-cheng1,CHEN Yong-nian2 |
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| Abstract: | Cutworm [Agrotis ypsilon (Rottemberg)] is am important tobacco pest in Hunan Province, its larvae of first generation injures tobacco plant in April and May, the egg and larvae of 1-3rd instar are sensitive to storm. Population of first generation and loss degree of tobacco depend on emergence quantity of over wintering generation and rainfall in the sensitive growth stage. Systematic sex attractant or light attractant were conducted in 6 pests forecasting stations, the results indicated that the positive correlation between "moth-rainfall coefficient" and the percentage of tobacco bitted by cutworm was obvious. "Moth-rainfall coefficient" = full number of moths by sex or light attractent (the general date is 20/2-10/4)/rainfall of the period of sensitive growth stage (10/3-10/4 in the South, or 20/4-20/5 in the West of Hunan), this coefficient is valuable in tobacco injury predication. |
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| Keywords: | tobacco cutworm[Agrotis ypsilon (Rott.)] occurrence predication |
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