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目的:通过调查甘肃省大黄主产区大黄病害种类及其特性,为病害综合防治提供理论依据。方法:田间调查和室内分离鉴定相结合。结果和讨论:共发现真菌性病害8种,分别为叶黑粉病Thecaphora schwarzmaniana、斑枯病Septoriasp.、锈病Puccinia rhei-palmati、轮纹病Ascochyta rhei、叶点霉灰斑病Phyllostica rhei、白粉病Erysiphe polygoni、灰霉病Botrytissp.、根腐病Fusarium oxysporiums、1种病毒病(毒源待定)。黑粉病发病率为14%~26%,为害严重,急待解决。白粉病、灰霉病为国内首次报道。
Objective: To investigate the types and characteristics of rhubarb disease in the main producing areas of rhubarb in Gansu Province, and provide theoretical basis for the comprehensive prevention and treatment of the diseases. Methods: field investigation and indoor separation and identification. RESULTS AND DISCUSSION Eight fungal diseases were found: Thecaphora schwarzmaniana, Septoriasp., Puccinia rhei-palmati, Ascochyta rhei, Phyllostica rhei, powdery mildew Erysiphe polygoni, Botrytissp., Fusarium oxysporiums, a viral disease (to be determined). The incidence of smut is 14% ~ 26%, serious damage, urgent solution. Powdery mildew, gray mold is the first report in China.