北方6个不同地区甜菜夜蛾发生为害研究初报

2009年在北方6个地区采用性信息素诱捕法研究了蔬菜田甜菜夜蛾的种群变化动态,同时调查其幼虫为害情况。研究结果表明,不同地区甜菜夜蛾的发生期长短、高峰日及高峰日蛾量等参数均存在明显差异,其中,河南洛阳地区于9月7日达到蛾量高峰,单个诱捕器内蛾量最高达到230.3头,高于天津宝坻（152.3头）、北京昌平（42.7头）和河北张家口（10.67头）,内蒙古呼和浩特和黑龙江哈尔滨地区未诱集到该成虫。田间幼虫的系统监测结果表明,河南洛阳在高峰期百株虫量（414头）远高于天津宝坻、北京昌平和河北张家口（41.2头、21头和2头）3个地区,表明在所调查的地区内,从南到北随着纬度增加,甜菜夜蛾成、幼虫的发生数量和为害程度逐渐降低。最后,初步分析了甜菜夜蛾在不同地区发生为害差异的主要影响因子。

Report on the Occurrence Regularity of Beet Armyworm, Spodoptera exigua in Six Different Areas in North China

The population dynamics and damage of beet armyworm,Spodoptera exigua was monitored using the sex attractant in 6 areas in 2009.The results showed that the periods,peak time,and moth quantities were different in the different areas.The peak time occurred on 7 Sep.and the highest quantity reached 230.3,which was higher than Tianjin (152.3),Beijing (42.7),and Zhangjiakou (10.67).S.exigua was not trapped in Neimenggu or Heilongjiang areas.The results from S.exigua larvae in the open field showed that there wer...