Abstract: Studies on the relationship between Aphis gossypii and its natural enemies in amount,time and space show that the amount of Propylaea japonica is closely related to that ofAphis gossypii, and they are synchronously occurred both at peak time and at lowestpoint.Propylaea japonica can significantly control by the occurence of Aphis gossypii.The three-dimensional spatial distribution patterns of Propylaea japonica, Erigonidiumgraminicola and Aphis gossypii are of aggregated type.The individuals of Aphis gossypiiand Erigonidium graminacopa are attracted each other, while those of Progylaea japonica.are repelled mutually.

Key words: Aphis gossypii, Natural enemy, Population dynamics