油松落针病是建庄林区油松比较严重的病害。根据我们的观察,那里的油松都有不同程度的感染,其中尤以新村附近的油松被害较为严重。为此,陕西省农林厅58年8月间指示保护组协同建庄森林轻营所进行防治试验。前后共防治两次,并进行了定期观察,直到十月下旬病源菌越冬停止入侵为止。虽然,病害发生的时间并不短,可是,由于我们发现较迟,当我们开始工作的时候,病源菌已经将到越冬的时候,所以,我们观察的 Pinus tabulaeformis disease is built Zhuanglin more serious pine diseases. According to our observation, there are different levels of Pinus tabulaeformis infection, especially the Pinus tabulaeformis near the New Village. To this end, Shaanxi Provincial Department of Agriculture and Forestry in August 58 during August instructed the protection group to build a forest light camp for prevention and control experiments. Prevention and treatment twice before and after, and carried out regular observation until the end of October to stop invasion of pathogenic bacteria overwintering. Although the disease did not take too long, however, since we found it later when we started to work, the pathogen was already overwintering. Therefore, what we observed