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通过1985～1988年鉴定研究,明确无融合生殖型苹果砧木红果三叶、威宁海棠、花红茶、卢氏海棠、泰山海棠、德钦海棠、栾川山定子和巴东海棠不抗苹果茎痘病毒、褪绿叶斑病毒和茎沟病毒。病毒浸染后,苗木接芽不萌发而枯死,或接芽萌发但植株严重矮化,节间缩短,叶片卷缩扭曲,枝梢顶端枯死。若3种病毒混合侵染,病势更加严重。上述鉴定品种因对苹果潜隐病毒敏感而不抗病,用作苹果砧木受到很大限制,只有在苹果接穗无病毒情况下,才得以繁殖苗木推广应用。平邑甜茶和石屏野海棠对潜隐病毒的抗病性,尚需进一步观察鉴定。
Through the identification research from 1985 to 1988, it is clear that apomictic apple rootstocks such as apricot, red apple, red apple, red apple, honeysuckle, begonia, begonia, Viruses, chlorotic leaf spot virus and stem groove virus. After the virus is infected, seedlings do not germinate buds and then die, or germination of buds but the plant seriously dwarfed, internodes shortening, leaf curling distortion, twigs tip dead. If the three kinds of virus mixed infection, the disease worse. The above-mentioned identification varieties are susceptible to the latent virus of apple and are not resistant to diseases. As the apple rootstocks are greatly restricted, they can be propagated and popularized only when there is no virus in the apple scion. Pingyi sweet tea and stone screen wild Begonia disease resistance of latent virus, still need further observation and identification.