内蒙古大兴安岭林区是我国重点国有天然林区之一,主要生长树种有兴安落叶松、白桦、樟子松、山杨等。过去由于注重采伐利用,林区的生态环境破坏加剧,导致森林病虫害的发生日趋严重。主要病虫害发生面积在上个世纪80年代初约为6.6万公顷,至2001年增加到17.3万公顷。历史上曾多次 The Greater Xing’an Mountains in Inner Mongolia is one of the key state-owned natural forest areas in China. The main tree species for growth are Larch, Betula platyphylla, Pinus sylvestris var. In the past due to the emphasis on the use of logging, the ecological environment in the forest area worsened, resulting in the growing incidence of forest pests and diseases. The main pests and diseases occurred in the area of ​​about 66,000 hectares in the early 1980s and increased to 173,000 hectares by 2001. There have been many times in history