Abstract: The conifer sawfly Neodiprion huizeensis Xiao et Zhou is an important pest feeding on Pinus armandi.It has 2 generations a year in Huize County,Yunnan Province,and overwinters as prepupae under duff and litter or in loose soil.Larvae are gregarious,having 6 instars.The white-teeth shrew Crocidura dracula Thomas is an effective cocoon predator preying on the overwintering prepupae reaching a predation rate of 50%-90%.Protecting natural enemies,using pesticide properly and cutting off twigs bearing the aggregated larvae are feasible prevention and control measures.