论文部分内容阅读
松突圆蚧Hemiberlesia pitysophila Takagi是我国对外植物检疫对象,是危及我国森林的重要害虫。1988年3～5月,我们就此虫在深圳口岸的为害作了进一步的系统调查。现综述如下。一、为害程度深圳市总面积283.76万亩,山地面
Hemiberlesia pitysophila Takagi is a foreign plant quarantine object of our country and an important pest that endangers our forests. From March to May 1988, we conducted a further systematic investigation into the damage caused by this pest at Shenzhen Port. Are summarized below. First, the degree of harm Shenzhen City, a total area of 2.8376 million mu of mountain ground