许漯地区(许昌、漯河市)位于河南省的中部,一是一代粘虫的常发区、三代粘虫的偶发区。七十年代中期前,该地区属间歇性大发生,但从七十年代后期至今,粘虫的种群数量有较明显的变化。及时掌握其变动趋势,分析其原因,对提高粘虫测报工作水平和综合治理有重要的意义。笔者对该地区粘虫种群数量变动趋势及其原因进行了初步探讨。 Xu Luo area (Xuchang, Luohe City) is located in the central part of Henan Province, one generation of armyworms habitat, the third generation of armyworms sporadic areas. Before the mid-1970s, the area was intermittently large, but since the late 1970s, there has been a marked change in the population of armyworms. Timely grasp of its changing trends, analyze the causes, to improve the level of armyworm reported the work and comprehensive management of great significance. The author of this area armyworm population changes in the number of trends and the reasons for a preliminary discussion.