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苹果果实果斑,无论果斑区有无下陷,已在6个苹果品种中发现。2种影响元帅(Delicius)的果斑病,是通过嫁接传染的,可能由病毒引起。果园中的几个元帅系品种,只有1种表现出病症。传染实验表明,在不同元帅系品种中的反应,有相似的差异。3个品种的7种果斑病,不是由嫁接传染的。
Apple fruit spots, regardless of whether the spot area subsidence, has been found in 6 apple varieties. Two fruit-spot blight affecting the Marshal Delicius, infected by grafting, may be caused by the virus. Several mandarins in the Orchard Department of the species, only 1 showed symptoms. Infection experiments show that there is a similar difference in response among different Marshal lines. Seven fruit spots of the three cultivars were not infected by grafting.