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1985—1987年对威宁县梨黑星病发生规律和防治效果观察表明,梨黑星病初侵染源主要是在病叶、病果中越冬的未成熟的子囊壳于次年产生子囊孢子进行侵染,其次是带菌的芽鳞和枝条。与其他地方报道略有差异。梨幼果期就能感病,病菌潜育期一般20多天,可用子囊孢子的出现来预测初侵染期。在威宁县一般3月15～20日喷第一次药,以后根据降雨情况每隔20天喷药一次,共4次;以锌铜波尔多液代替波尔多液效果显著。药剂防治主要取决于冬季在梨树冠上下施药是否均匀以及第一次用药时期和间隔时间。
From 1985 to 1987, we observed the regularity and control effect of pear scab in Weining County. The results showed that the primary source of pear scab was the invader originated in the diseased leaves and fruit trees, Infected, followed by carrying bud scales and branches. Report slightly different from elsewhere. Pear young fruit will be susceptible, the germ incubation period is generally more than 20 days, the availability of ascospores can be used to predict the initial infection period. Weining County in March 15 to 20 spray the first drug in general, after the next 20 days according to the rainfall spray once, a total of 4 times; Bordeaux mixture of zinc and copper Bordeaux mixture effect was significant. Pharmacy prevention and control mainly depends on the pear in the winter top and bottom pesticide application is uniform and the first time and interval medication.