麦套春棉主要害虫和天敌的生态位研究

Studies on ecological niche of primary insect pests and enemies in the fields of spring cotton interplanting with wheat

调查了麦套着棉不同时期内，棉株上、中、下部棉蚜AphisgossypiiGover、棉叶螨TetranychustruncatusEhara、棉铃虫Helicoverpaarmigera（Hubner）和其主要天敌的数量。求得各期害虫与害虫、害虫与天敌、天敌与天敌之间的生态位宽度和重叠指数，并分析了它们彼此在空间上的竞争关系。

The numbers of ophis gossypii Glover, Helicoverpa armigera (Hubner), cotton mites and their primary enemies in the upper, middle and lower parts of cotton plants in different developmental periods of spring cotton interplanting with wheat were investigated. Based on the invastigated results, the indexes of ecological niche breadth and niche overlap between insect pests and insect pests, insect pests and enemies, enemies and enemies were obtained, and the competitive relations among them in the space were analysed.