杉木作为一种速生丰产的优良树种,在我省许多地区都进行了栽培种植。杉木适应性强,生长迅速,中心产区20年左右即可成材利用,价值很高。如何种好杉木,除选择好地势、土壤、气候条件及搞好抚育管理外,病虫害的防治工作同样不可忽视。如杉木炭疽病几乎遍及杉木栽植区,是杉木生产的一大病害。现将防治此类病的方法简介如下。移木炭疽病发病期在每年杉木新梢开始萌发的春季和初夏。虽然不同龄级的新老针叶和嫩梢都可能发病,但以次年生的梢头受害最重。通常是枝梢顶芽以下约10厘米内的针叶首先发病枯萎,这种现象称为“颈枯型”,是杉木炭疽病的典型症状。幼树主梢以下1一3轮枝盘最易感病,病菌先从针叶开 Cunninghamia lanceolata, a fine tree species with fast growing and high yield, has been planted and cultivated in many areas in our province. Chinese fir adaptability, rapid growth, the central producing areas can be used for about 20 years, high value. How to grow good fir, in addition to select the topography, soil, climate conditions and do a good job of tending and management, the prevention and treatment of pests and diseases can not be ignored. Cunninghamia lanceolata such as almost all over the planting area of ​​cedar, fir is a major disease. The prevention and cure of such diseases are summarized below. The onset of anthracnose in the beginning of the annual shoots of Chinese fir shoots begin in spring and early summer. Although different age classes of old and new needles and young shoots are likely to occur, but in the next year’s shoots the most victims. It is usually the top of shoots about 10 cm below the first needle withered senescence, a phenomenon known as “neck type” is a typical symptom of Chinese fir anthracnose. The main shoots of young trees the following 1 to 3 rounds of the most susceptible to disease, bacteria first from the needles open