Crown canker caused by Paramyrothecium roridum on greenhouse muskmelon (Cucumis melo) in China

文献类型： 外文期刊

第一作者： Chen, Zhen-Dong

作者： Chen, Zhen-Dong;Li, Pan-Liang;Chai, A-Li;Guo, Wei-Tao;Shi, Yan-Xia;Xie, Xue-Wen;Li, Bao-Ju

作者机构：

关键词： crown canker;Cucumis melo;ITS-5;8S rDNA;muskmelon;Paramyrothecium roridum;translocation elongation factor 1-alpha

期刊名称：CANADIAN JOURNAL OF PLANT PATHOLOGY （ 影响因子：2.442； 五年影响因子：1.993 ）

ISSN： 0706-0661

年卷期： 2018 年 40 卷 1 期

页码：

收录情况： SCI

摘要： A crown canker disease causing yellowing and wilting of the leaves was observed on muskmelon (Cucumis melo) plants in a number of greenhouses in Shouguang county, Shandong province, China, during April 2014 to July 2015, resulting in serious economic losses. Black sporodochia with white mycelial tufts emerged on surfaces of lesions at the base of the stem. Eleven fungal strains were isolated from infected tissues. On the basis of morphological features, ITS-5.8S rDNA and TEF1 sequence analysis, the isolates were identified as Paramyrothecium roridum (Tode) L. Lombard & Crous (syn. Myrothecium roridum Tode). The pathogenicity of the isolates was confirmed. The morphological characteristics of reisolated strains from inoculated muskmelon plants showing symptoms of crown canker were consistent with the original strains. A host range test indicated that strains had a wide range of hosts. To the best of our knowledge, this is the first report of muskmelon crown canker caused by P. roridum in China. This disease could have a significant economic impact on muskmelon production.

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