林木昆虫演变为重大害虫的主要环境因子

综述了有关林木害虫产生的环境机制，主要包括大气污染、干旱、全球气候变化、外来有害生物的入侵、害虫自身生物学特性与森林经营模式的影响等，以便为害虫的综合防治提供基础理论资料。同时提出今后研究方向：树种、害虫、天敌和生存环境4者关系开展研究，特别调控森林生态系统的主体一植被的时空结构；同时协调运用与环境和其他有益物种的生存和发展和谐的各类措施，将害虫控制在不成灾水平，并在时空上达到可持续控制的效果。表2参33

Main environmental factors for forestry insects that become important pests

This paper discussed why some insects become pests with primary reasons being clarified in order to control pest of forest in the future.These reasons included drought,atmospheric pollution,consequences of global change,and exotic invasive species.Moreover,three key points for rationally allocating different tree species to forests,so as to prevent pest disasters,were put forward,namely: biodiversity to enhance ecosystem stability,a risk dispersing mechanism,and a relative resistance principle.Based on regulation of tree species distribution and time-space structure in forest ecological systems must either promote pest control or at least not increase forest pest damage.