稻纵卷叶螟经济阈值的研究
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STUDIES ON ECONOMIC THRESHOLD OF CONTROLLINGRICE LEAF ROLLER,CN APHALOCROCISMEDINALIS GUENEE
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    摘要:

    本文研究了稻纵卷叶螟(Cnaphalocrocis medinalis Guenee不同龄幼虫取食量,田间水稻不同品种接种不同密度幼虫后小区产量、空壳率、千粒重和损失率,不同剑叶受害面积与产量损失关系,天敌参数,以及施药防治的成本估计等。查明田间幼虫密度(x)与产量损失率(y)呈正相关,分品种建立了线性回归方程。综合上述因素求出平均济济闭值为百丛虫口45.67±6.02头,平均经济损失水平为百丛虫口60.0±7.92头;天敌参数为17.91±0.61头;平均防治行动阈值为百丛虫口63.57±6.63头;早稻第二代幼虫防治行动阈值为百丛虫口67.24±4.97头,晚稻第四代幼虫防治行动阈值为百丛虫口59.91±4.47头。

    Abstract:

    In this study, not only the amount of feeding rice leaves by the larvae of leaf roller in various instars has been measured in the laboratory, but also the grain yield, the percentage of empty grain,the rate of yield loss and the weight of 1,000 grains per plot have been surveyed in the paddy field planted to various rice varieties and encroached by the larvae of rice leaf roller in various population densities. Besides, the relationship between the area of injured flag leaves and the yield loss per plot, t...`

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陈常铭,赵和庚,李实福.稻纵卷叶螟经济阈值的研究.生态学报,1984,4(2):149~156

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