我省是黄河流域棉花重要产区之一,但近年棉铃虫连年大量发生,特别是1992年全省大暴发,其特点为发生早、数量大、盛期长、世代重叠,发生面积之广、为害时间之长与经济损失之重为历史罕见,棉农反映极为强烈。现就冀南地区棉铃虫发生原因及其综合治理对策,提出租浅看法和建议供作商榷。一、原因分析 1.种植结构的变化:棉铃虫在冀南常年发生四代,以蛹在土壤中越冬,第一代主要为害小麦,第二、三、四代主要为害棉花,其中三、四代夏玉米也是其重要寄主,尤其夏玉米田的第四代为全年 The province is one of the important cotton producing areas in the Yellow River Basin. However, in recent years, the occurrence of cotton bollworm has occurred in large numbers in successive years, especially in the major outbreaks in 1992 in the province. Its characteristics include early occurrence, large quantity, long period, The duration of the damage and the weight of the economic losses are rare in history, and the farmers have been extremely strong. Now on the cause of Jinan bollworm and its comprehensive control measures, put forward to rent shallow views and suggestions for discussion. First, the reasons for the analysis 1. Changes in planting structure: Helicoverpa armigera pests in the perennial generation of four generations in Jinan, winter in the soil with pupae, the first generation of wheat, the second, third and fourth generations of major cotton damage, of which three, four Summer maize is also its important host, especially the fourth generation of summer corn field for the whole year