通过 1997年 10～ 12月、 1998年 3～ 4月及 1999年 1月的 3次调查 ,共设调查线路 18条 ,调查点及标准地 5 6个。查清了面积为 346 4 5 7hm2 的世博园外围林区主要森林植物病虫鼠的种类、发生面积及危害程度。记录外围林区病虫鼠标本 14 3种 ,其中害虫 71种 ,病害 36种 ,天敌 2 7种 ,鼠类 9种。调查中发现国家级检疫对象 2种 ,省级检疫对象 5种。并针对主要病虫鼠的危害情况 ,提出了相应的防治对策 Through three surveys from October to December 1997, March to April 1998 and January 1999, a total of 18 investigation lines, 56 investigation points and 56 standards were set up. The area, the area and the degree of harm of the major forest plant pests in the Expo area of ​​346,457hm2 were examined. Thirteen species of pests, including 71 species of pests, 36 species of diseases, 27 species of natural enemies and 9 species of rodents were recorded. In the survey, there were 2 quarantine objects at the state level and 5 quarantine objects at the provincial level. And for the main pest damage, put forward the corresponding control measures