我省苹果生长季高温多雨,苹果炭疽病危害十分严重,常年损失产量20～40％。病害流行年份,小国光、鸡冠、红绞等易感病品种损失高达90％以上,采收时的好果,贮藏期仍陆续发病可达50％左右。针对这一问题,我们于1980～1984年与淮阴市清江果园和徐州市果园协作,对病菌侵染与发病关系,病害周年发病动态和药剂防治方法进行了研究。 侵染规律 (一)越冬病菌形成分生孢子的观察 Apple growing season in our province hot and rainy, apple anthrax hazards are very serious perennial loss of yield 20 to 40%. Year of disease epidemic, small country light, cockscomb, red twisted and other susceptible varieties loss as high as 90% or more, the harvest of good fruit, the storage period is still up to about 50% of the disease. In response to this problem, we cooperated with Qingjiang orchards and Xuzhou orchards in Huaiyin City from 1980 to 1984 to study the relationship between the infection of pathogens and pathogenesis, the annual incidence of diseases and the methods for preventing and controlling pesticides. Infection rules (A) overwintering pathogens formation of conidia observed