温州市第三代二化螟大发生原因分析
Outbreak of the third generation of Chilo supperssalis in Wenzhou.
李仲惺
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DOI:10.7679/j.issn.2095-1353.2000.082
作者单位:浙江省温州市农作物病虫测报站,温州325006
中文关键词:3代二化螟;防治适期;残留虫量
英文关键词:the third generation of Chilo supperssalis;proper period to control;residual individuals
中文摘要:第 3代二化螟大发生是由防治第 2代时失去最佳防治适期 ,而使其绝大部分幼虫存活下来 ,成为第 3代有效虫源所致 ;二是发生时间早 ;三是早稻收割期天气差 ,使 2代向 3代的转化率提高。1998温州市第 3代二化螟大发生正是由于上述 3个原因综合的结果 ,发生面积达 13.5万公顷 ,占当
英文摘要:The reasons of the outbreak of the third generation of Chilo supperssalis in Wenzhou in 1998 are analysed.The first was failing to control its second generation in a proper period and most of the individuals survived to become the effective source