【摘要】 <正> 前言杉木炭疽病(Colletotrichum sp.)是杉木(Cunninghamia laneolata)上最常见的一种病害,随杉木种植的不断扩大,为害渐趋严重。在重病林分中,枝梢大量枯死,致使树木不能成材;在一般感病林分中,病枝、病叶的死亡对树木生长也有相当影响。近年来,国内对杉木炭疽病的病原及发病条件等,已进行过一些研究,并肯定了某些栽培措施的防病效果。但是在对病害防治至关紧要的侵染问题,则较少研究。如关于病菌易从伤口侵入更多还原

【Abstract】 The pathogen of anthracnose(Colletotrichum, sp.) on China fir has a strong saprophytic ability. Residue of tissues affected can provide the source of pathogen for a long time. The pathogen can directly invade host plants, besides wounds. From late spring to early summer when shoots of China fir are growing quickly, the infections reached to a greatest amount. In seriously affected stands, new shoots are approximately entirely attacked. Part of them appear symptoms in autumn, but most of the affected shoots are diseased in the next spring. The incubation period is more than ten months. Weak trees are more easily attacked while strong trees do not appear symptoms although the pathogens are in the tissue. Thus, the basical measures to control anthracnose on China fir are finding suitable place for planting and good care of growth. A determination of the duration of infection provides scientific basis for fungicidal application.更多还原