我省绿化荒山，保护生态平衡，减轻水土流失的主要树种是松树。松毛虫是这个树种的主要害虫，年年都有不同程度的发生，严重危害林木生长。控制虫害蔓延是保证我省森林资源的当务之急。为减少防治的盲目性，准确预报松毛虫发生趋势是关键，为此需要进行研究，建立松毛虫预测预 Afforestation wasteland in our province, to protect the ecological balance and reduce soil erosion is the main species of pine trees. Dendrolimus is the main pest of this species, varying degrees of occurrence every year, seriously jeopardizing the growth of trees. To control the spread of insect pests is the top priority of forest resources in our province. In order to reduce the blindness of prevention and control, it is the key to accurately forecast the trend of occurrence of Dendrolimus punctatus. Therefore,