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本文通过聚集度指标测定以及Ｉｗａｏ＇ｓＭ－ｘ线性回归模型及其改进模型和Ｔａｙｌｏｒ＇ｓ幂回归模型分析，结果表明棉蚜、小枕异绒螨幼螨及其寄生棉蚜的个体间均相互吸引，空间格局的基本成份均系个体群，在低密度下，个体群均呈普通聚集格局；聚集速率均随种群密度的提高而下降，顺序为小枕异绒螨幼螨＞棉蚜＞被寄生棉蚜；但在一切条件下，其聚集强度均随种群密度的提高而加强，顺序为棉蚜＞小枕异绒螨幼螨＞被寄生棉蚜。本文末分析了棉蚜、小枕异绒螨幼螨及其寄生棉蚜在棉田内的聚集原因和内在关系。
In this paper, aggregation degree index determination and Iwao’sM-x linear regression model and its improved model and Taylor’s power regression model analysis showed that the cotton aphid, small pillow Euproctis mite and its parasitic cotton aphid individual At the same time, all the individuals in the spatial pattern were clustered together. Under the condition of low density, all the individuals showed normal aggregation pattern. The aggregation rate decreased with the increase of population density in the order of young mite> cotton aphid> Parasitized cotton aphid. However, under all conditions, the aggregation intensity of the cotton aphid was enhanced with the increase of population density in the order of cotton aphid> cotton foxtail mite> parasitized cotton aphid. At the end of this paper, we analyzed the reason and the internal relationship of the accumulation of Aphis gossypii and its minor mites and their parasitic cotton aphids in cotton fields.