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棉田是以棉花为中心所构成的生态系统。由于棉花各生育阶段所提供的营养物质、化学信息物质,以及小气候的不同,因此,棉花各个生育阶段的害虫种类和种群数量是不一样的;与此相适应的天敌种类和种群数量也不相同。不同的棉虫和一种棉虫在棉花不同生育阶段,天敌对它的控制程度亦有区别。为了更好地保护和利用棉虫自然天敌,发挥其应有的效能,必须了解在一定的区域内,棉虫天敌种类及其分布情况,研究它们
Cotton is a cotton-centered ecosystem. Due to the different nutrients, chemical information materials and microclimates provided during the different growth stages of cotton, the species of pests and the numbers of the populations in different growth stages of cotton are not the same. The species and populations of the natural enemies are not the same . Different cotton insects and a cotton insects in the different stages of cotton growth, natural enemies of its degree of control is also different. In order to better protect and utilize the natural enemies of cotton insects and exert their due potency, it is necessary to understand the types and distribution of natural enemies of cotton insects in certain areas and to study them