在西华盛顿地区，病害使得月季种植成为烦琐之事。
Several diseases make growing modern hybrid roses something of a chore in Western Washington.
嫁接是月季繁殖的主要方法之一，筛选抗根癌病的砧木是防治该病害的一种很好的途径。
Propagation of rose is carried out in grafting generally. Using resistant rootstock is a good method for the control of this disease.
作为月季的主要病害之一，月季黑斑病已经是世界性的病害。
Black spot of rose, as one of the major diseases of rose, is a worldwide disease.
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