该文回顾了我国杨树病害研究与防治的现状。
The present paper reviewed the current situation of research and control on poplar diseases in China.
本文报导的内蒙古东部区杨树病害计22种，其中真菌病害19种，螨类病害1种，菟丝子害1种，生理病害1种。
There are 22 kinds of poplar diseases in East Inner Mongolia Among these diseases, 19 are caused by fungi, 1 by Cuacuta japonica Choisy, 1 by Eriophyes sp. , and 1 by physiological pests.
灰斑病是杨树的主要病害。
The grey leaf—spot is one of the essential diseases of poplar.
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