| 玉米螟不同虫态发生期、发生量对第1,2代玉米螟发生程度的影响 |
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| 引用本文： | 杨长城,宋亚坤.玉米螟不同虫态发生期、发生量对第1,2代玉米螟发生程度的影响[J].计算机科学,2000(5):435-438. |
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| 作者姓名： | 杨长城 宋亚坤 |
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| 作者单位： | [1]沈阳农业大学植保系,辽宁沈阳 [2]辽宁省植物保护站,辽宁沈阳 |
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| 摘 要： | 通过对第１，２代玉米螟各虫态发生期、发生量和为害率的连续调查结果分析表明：玉米螟各代的虫量基数只是影响当代发生程度的因素之一，并不能决定发生程度。玉米螟的发生程度与当代发生数量呈正相关，与田间落卵量关系更为密切，与发生时期关系不大。发生数理与发生历期呈正相关，第１，２代玉米螟的发生程度没有必然的联系，而表现为间断性和相对独立性。第２代玉米螟的田间产卵量是第１代玉米螟的３．７５～７．１倍，造成玉米被害率成倍增加。
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| 关 键 词： | 玉米螟 死亡率 成虫数量 产卵量 为害率 |
Effects on Occurrence Extent of the First and the Second Generation of the Occurrence Time and Number of Different Stages of Maize Borer |
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| YANG Chang-cheng,CONG Bin,et al..Effects on Occurrence Extent of the First and the Second Generation of the Occurrence Time and Number of Different Stages of Maize Borer[J].Computer Science,2000(5):435-438. |
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| Authors: | YANG Chang-cheng CONG Bin |
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| Abstract: | Continuous sampling on occurrence time, number of population and rate of injury of different stage of 1st and 2nd maize borer have been carried out. Statistics results indicated as follows. The initial number of maize borer population was just one of the |
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| Keywords: | maize borer mortality number of adult number of eggs deposited rate of injuryl |
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