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杉木是我省文化大革命以来新发展起来的主要用材树种。到目前为止,全省已营造杉木林50余万亩。随着杉木生产的发展,杉木叶枯病发生越来越普遍。据调查,严重的地区最高发病率达90％以上,一般在20～30％,对林木生长有着很大的影响。 近年来,各地对杉木炭疽病,杉木细菌牲叶枯病,化学防治等方面专题研究较多,但在同一林地、同一植株上,几种主要致病菌感染情况,和以营林措施防治两种以上病原菌的效果研究方面,尚少见报导。我们从生产实际出发,从1975年起,协同高淳县大荆山林场,建立了以营林措施防治杉木叶枯病的样板林830亩。从1976年开始,又以本所杉木幼林为主,对产生叶枯的几种主要病原菌和发生、发展规律等方面,进行了研究观察。现将初步结果整理于下:
Chinese fir is the new timber species newly developed since the Cultural Revolution in our province. So far, the province has created more than 50 acres of fir forest. With the development of fir production, the occurrence of Chinese fir leaf blight is more and more common. According to the survey, the highest incidence of serious areas reached more than 90%, generally 20 to 30%, has a great impact on the growth of trees. In recent years, there have been many researches on anthracnose in Chinese fir, bacterial leaf blight of Chinese fir, chemical control and so on. However, in the same forest and the same plant, In terms of the effects of the above pathogens, it is rarely reported. Starting from the actual production, starting from 1975, in cooperation with Dashan Forest Farm in Gaochun County, we established 830 hectares of model forest for preventing and controlling fir leaf blight with silviculture measures. Since 1976, we have also conducted researches on the main pathogens that cause leaf blight and their occurrence and development in this area. Now the preliminary results are organized in the following: