红松是培育大径优质用材林木的主要更新、造林树种。五十年代以来,敦化市营造的3万多亩红松林,现已郁闭成林,成为重要后备森林资源。但自1979年以来,已由部分林分中零星单株的发生红松疱锈病,蔓延为成片的病区。据1983年调查,敦化市红松疱锈总发病面积达24,805亩,平均发病率为8.3%。该病在寒葱岭林场为害最重,其发病率为29.1%,感 Korean Pine is to cultivate large-diameter timber with high quality timber is the main update, afforestation species. Since the 1950s, more than 30,000 acres of Korean pine forests have been built in Dunhua City and have now become closed reserve forests. They have become important reserve forest resources. However, since 1979, red pine blister rust has been sporadic outbreaks in some parts of the forest and spread as a ward. According to the 1983 survey, Dunhua City, the total incidence of Korean pine blister area reached 24,805 acres, the average incidence rate of 8.3%. The disease in the cold Congling most damaging the farm, the incidence rate of 29.1%, flu