Under condition that the statical and dynamical patterns of Dendrolimus tabulae-formis larvae were tested, have been studies conducted systematically on the tree sampling, ring sampling and branch sampling. Based on the characteristics of the vertical distribution of the larvae on each ring of Chinese pine, it was found that tree sampling is simplified to ring sampling by cresting ring regression models. According to speciality of the larvae feeding mainly biennial pineneedle. the ring sampling was also fui...