论文部分内容阅读
经过2 年多时间的调查,在建成的林带内共记载病害57 种,虫害89 种,有些为上海新记录。其中多种病虫对林带构成较大威胁。并对林带病虫发生与危害特点作了初步分析。
After more than two years of investigation, a total of 57 diseases and 89 pests were recorded in the built forest belts, some of which were new records in Shanghai. Many pests and diseases pose a greater threat to the forest belt. The characteristics of pests and diseases in forest belt were also analyzed.