Prediction of the natural population dynamics of Spodoptera litura Fabricius

Depending on the mathematical relationship between the development period and temperature,the survival rate of egg and larvae in fields and the relationship between egg and date,a dimension-changable matrix model was established to predict the natural population dynamics of Spodoptera litura F.in cabbage fields in the suburbs of Nanchang City.The trends of the population dynamics of the observed and predicted are quite similar.