【摘要】 1986—1987年在肇东市、加格达奇市小黑杨(Populus simonii × nigra)肿茎溃疡病病皮上首次发现了病菌的有性型。经分离培养与接种试验证明该菌是杨棒盘孢菌(Coryneum populinum Bresad.)的有性型,定名为东北球腔菌(Mycosphaerella mandshurica M.Miura)。在PDA和麦芽糖琼脂培养基上能产生分生孢子。病菌以子囊座、分生孢子盘、分生孢子在病皮或残叶上越冬,翌年春在子囊座内形成子囊孢子,并能成为病害的初次侵染源,一年只发生一次。更多还原

【Abstract】 The teleomorph of the pathogen causing swollen stem canker of poplar was first found on the diseased bark of Populus simonii×nigra in Zhaodong City and Jiagedaqi City in 1986 and 1987. Through isolating, culturing and inoculation experiments, it is verified that the fungus is the teleomorph of Coryneum populinum Bresad. It is identified to be Mycosphaerella maudshurica M. Miura. The fungus can produce conidia on the media of PDA and Malt-agar. The pathegen overwinters in the form of ascostroma, acervulus and conidia on the diseased bark or fallen leaves. Ascospores are produced in the ascostroma in the following spring and become the source for the primary infection of the disease. The teleomorph occurs once every year in the disease cycle.更多还原