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作 者 ：孙富余,田春晖,赵成德,赵文生,王小奇

期 刊 ：生态学报 2002年 22卷 10期 页码：1704~1709

关键词：稻水象甲；种群增长规律；害虫发生趋势预测；综合防治；

Keywords:Lissorhoptrus oryzophilus, population increasing regulation, forecast of the occurrence tendency of pest, IPM,

摘 要 ：扣笼接虫观测稻水象甲不同接虫密度所产下代虫量。结果表明 ,稻水象甲种群增长具有明显密度依赖性 ,接虫密度X越大 ,代间增殖倍率 Y2 越低。 X-Y2 关系用 Y2 =1 /( 0 .836 + 0 .4 2 1 X)的双曲线拟合良好。以水稻移栽后稻田成虫密度 N为指标 ,越冬成虫存活率为 S0 ,防治后成虫残存率为 S1,则第 t和 t+ 1年种群密度关系可表述为 :Nt+ 1=S0 S1Nt/( 0 .0 836 + 0 .0 4 2 1 S0 S1Nt)。模型参数值稳定 ,拟合度好 ,模型描述的种群增长规律与稻水象甲侵入辽宁省以来种群增长的实际情况相吻合。用该模型预测辽宁省不同地区稻水象甲的发生趋势其准确率高 ,并可指导稻水象甲的综合防治。

Abstract:In China,rice water weevil (Lissorhoptrus oryzophilus) is a quarantine pest. which was first discovered in Dandong City,Liaoning Province in 1991.Then it was found in 5 cities of Liaoning Province in 1995.The wide occurrence and severe damage of it were spreading quickly in whole Liaoning Province.From 1995 to 1997,this study was carried out at Yiquan town,Donggang City,Liaoning Province where it occurred seriously. The cage used in this study has a steel skeleton screen covering (1m×1m×1.5m in size and 25...

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