气候异常、林分结构不合理、过度依赖化学农药等原因使我国林业病虫害日益加重,每年由病虫害造成的损失已经大大超过火灾造成的损失,使我国林业建设遭到了破坏性的打击。病虫害的防治具有周期性和不可控性,事后治理只能是治标不治本,因此,必须建立预防一体的防治机制,加大生物防治研究,以期恢复生态平衡,达到林业建设的可持续发展。 Climate anomaly, irrational stand structure, over-reliance on chemical pesticides and other causes make our country’s forestry pests and diseases are aggravating day by day, the losses caused by pests and diseases have greatly exceeded the losses caused by the fire, so that our country’s forestry construction has been devastating blow. Therefore, it is necessary to establish a prevention and control mechanism that integrates prevention and control and increase biological control research in order to restore the ecological balance and achieve the sustainable development of forestry construction.