Özet:

Madagascar periwinkle (Catharanthus roseus L.) is an is annual, flowering and herbaceous ornamental plant originated in Madagascar. It is used for landscaping for parks and gardens. One of the most important disease in this plant is stem, root and crown rot caused by Rhizoctonia solani Kuhn. Disease-related problems on the plants have been observed in growing areas in İzmir. For this reason, infected plant samples were collected from Bornova and Bayındır district in İzmir and R. solani isolates were obtained. As a result of the pathogenicity tests, all the isolates caused root and crown rot on Madagascar periwinkle. According to morphological and molecular identification methods, 5 R. solani AG-4 isolates were determined. This is the first report of R. solani AG-4 of Madagascar periwinkle in Turkey.

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