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调查了准北棉田不同时期棉花主要害虫及其天敌自然种群的数量 ,求得害虫与害虫、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 natural populations of major cotton pests and their natural enemies at different periods in the quasi-north cotton field were investigated. The niche breadth and overlap index between pests and pests, pests and natural enemies, natural enemies and natural enemies were calculated and analyzed. Competition