Swollen stem canker of poplars is a new disease that has not been reported at home and abroad. It distributes widely, damages badly and is a serious threat to the poplar management. It is proved that the disease is an experance of grey leaf-spot of poplar on the stem through the cross-inoculation. The pathogen of the disease is Coryneum populinum Bresad. The pathogen penetrates the host through wounds or directly through the epidermis. The incubation period of the disease is 7—10 days and the reproduction p...
【正文快照】
杨树肿茎溃疡病,是一种新病害,近年来在黑龙江、吉林两省普遍发生,为害多种杨树品种,其中以小x黑(populus simoniiXni‘ra)、小青X黑(populus pseudo-sirnonsi x nigra)和北京杨605(Populus pakinensis一605)受害严重。由于肿茎溃疡病,会导致育苗和造林的失败,对杨树威胁很大。
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