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Southern Sclerotium Root Rot Caused by Athelia rolfsii on Table Beet in New York

S. J. Pethybridge, S. Sharma, A. Silva, C. Bowden, S. Murphy, N. L. Knight, and F. S. Hay

January 2019

Brief

Southern Sclerotium root rot caused by Athelia rolfsii (syn. Sclerotium rolfsii) is a damaging soilborne disease of field and specialty crops. In 2015, 2016, and 2017, wilted plants, root rot, and decay in six table beet (Beta vulgaris spp. vulgaris) fields across New York were observed. In these outbreaks, losses ranged between 5 and 25%. White mycelial mats and golden brown sclerotia (1 to 2 mm diameter) were observed on diseased plants and decayed roots. The objective of this study was to identify the fungus associated with these symptoms and assess pathogenicity in table beet.

doi:10.1094/PHP-07-18-0037-BR

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