This paper dealt with the population dynamics of citrus red mite Penon-ychus citri McG and its predator Amblyseius eharai at Qianwei orchard in Changxing islond, Shanghai.To study the ecological factors affecting the population dynamics of the citrus red mite and in turn to forecast the trend of population dynamics , a non-linear multiple regressive model and a mixed regressive model were created, respectively, by using the time series analysis methods.The results showed that the field investigation data we...