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地处正定县北部老磁河一带大面积的刺槐林,由于连年来桑褶翅尺蛾的出现和猖獗危害(严重发生时几乎将叶片吃光),影响了林木的正常生长。1977年,我们遵照毛主席“不但要造林,而且要护林”和“同病虫害作斗争”的伟大教导,自3至5月份对该虫的生活史进行了观察,并做了防治试验,结果如下:一、分布桑褶翅尺蛾,据初步调查,分布在正定县北部老磁河一带,附近五公里有少量发现。二、危害树种及被害状
The large area of Robinia pseudoacacia forest in the area along the Laoshe River in the north of Zhengding County affected the normal growth of trees because of the appearance and rampant damage of the moths Plumage moths in recent years (almost ate the leaves in severe occurrence). In 1977, following the great teachings of Chairman Mao “not only for afforestation but also for forest protection” and “fight against pests and diseases”, we observed the life history of the insects from March to May and conducted prevention and control tests. The results are as follows : First, the distribution of Mulberry wing moths, according to preliminary investigations, located in the north of Zhengding County, the old Reed River area, a few found near a few kilometers. Second, endanger tree species and victims of the state