| 化隆县黄河谷地杨毒蛾发生期预测预报的研究 |
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| 引用本文： | 马红卫,严多发,赵忠学,杨占英.化隆县黄河谷地杨毒蛾发生期预测预报的研究[J].青海农林科技,2007(3):19-20. |
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| 作者姓名： | 马红卫 严多发 赵忠学 杨占英 |
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| 作者单位： | 化隆县林业局森防站,青海,化隆,810900 |
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| 摘 要： | 利用4a对杨毒蛾发生期的系统观测资料,运用数理统计方法,计算出杨毒蛾同一虫态和不同虫态的理论期距值和平均值标准差,准确地预测出某一虫态的始盛期、高峰期和盛末期。可为确定该种最佳的防治时期提供科学的依据。
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| 关 键 词： | 杨毒蛾 期距值 标准差 预测预报 |
| 文章编号： | 1004-9967（2007）03-0019-02 |
| 修稿时间： | 2007-03-26 |
Forecast on Occurrence Periods of Leucome candida in Yellow River Valley of Hualong County |
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| MA Hong-wei,YAN Duo-fa,ZHAO Zhong-xue,YANG Zhan-ying.Forecast on Occurrence Periods of Leucome candida in Yellow River Valley of Hualong County[J].Science and Technology of Qinghai Agriculture and Forestry,2007(3):19-20. |
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| Authors: | MA Hong-wei YAN Duo-fa ZHAO Zhong-xue YANG Zhan-ying |
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| Institution: | Forest Pest Management and Quarantine satation of Hualong county, Hualong Qinghai 810900, China |
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| Abstract: | Systemic data of teucome candida occurrence periods were desired by four years direct observation.We used symbolic statistic methods and fogured out theory distance value and average standard deviation of this insect in same state and different states,and forecast vigorous period,fastigium period and telophase periods truly.Scientific tests were provided for determining optimal date of prevention and control. |
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| Keywords: | Leucoma Candida oistance value Standard deviation Forecast and prediction |
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