【摘要】 系统调查了春棉不同时期内棉株上、中、下部棉蚜、棉叶螨、棉铃虫及其主要天敌的数量，求得各时期的群落多样性指数、均匀度、稳定性和相似性指数，并分析了各期害虫和天敌群落结构特征，用于指导棉花害虫防治，取得了显著的效益。更多还原

【Abstract】 Numbers of Aphis gossypii Glover,Helicoverpa armigera Hüubner ,cotton mites and their primary enemies in the upper,middle and lower parts of cotton plants in different periods of spring cotton were investigated .Based on the investigated results,the indexes of diversity,uniformity,stability and similarity of community were obtained ,and the characteristics of community in every period were analysed .It gave great benefits by using them to direct the control of spring cotton pests.更多还原