The prediction of masson pine moth,Dendrolimus punctatus,in Qianshan County of Anhui Province was studied and 102 trapping locations was chosen to place traps-baited with sex pheromone throughout the county.The number of adult males trapped of the overwintering generation was counted and recorded.Some environmental factors such as the height of the pine tree,slope direction,plant type were recorded at the same time.The independent variables consist of these environmental factors and the number of adult mal...