Abstract: By the methods of geostatistics, this paper analyzed the temporal structural characters and autocorrelations of the population dynamics of second generation cotton bollworm (Helicoverpa armigera) in Binzou City of Shandong Province in 1965—2004. Optimal simulation models were selected based on the decision coefficient R² and Akaike’s Information Criteria (AIC). The results showed that the optimal simulation models of the amount of overwintering pupae(Ⅰ), accumulated amount of eggs on 100 cotton plants (Ⅱ), and occurrence degree (Ⅲ) of second generation H. armigera were all of spherical. These three indices had an aggregative distribution, and their change ranges were 10.41, 12 and 12.06 years, respectively, with a high accordance. The temporal autocorrelations of the three indices were 53.22%, 52.62% and 69.06%, respectively, and the population variance resulted from the structural characters of the indices ranged from 25% to 75%, being a medium degree of spatial autocorrelation with the sequence of Ⅱ<Ⅰ<Ⅲ, while the spatial variance resulted from the random parts ranked in adverse.

Key words: Liposcelis bostrychophila, Fumigation, DDVP, Lethal reaction