Abstract
Inoculation of carrot roots with Typhula spp. revealed that T. variabilis Riess and T. japonica Terui cause decay of carrot roots under snow, with rotting of the root crown. T. variabilis was more virulent than T. japonica. These fungi and T. incarnata Lasch: Fr., also attacked rapeseeds during the winter, and rapeseed leaves became blighted, bleaching out, then drying and crumbling. Sclerotia were found on damaged tissue. This is the first rigorous study of the phytopathogenicity of T. variabilis and T. japonica on carrots and rapeseeds and of T. incarnata on rapeseeds.
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Acknowledgments
We thank the staff of the Otofuke, Shari, and Youtei districts of the Japan Agricultural Cooperatives for help with field surveys on overwintered carrots. We also thank Yoshie Nishiwaki of the Hokkaido Research Organization for sclerotial samples and an image of diseased carrots in Takikawa.
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Ikeda, S., Hoshino, T., Matsumoto, N. et al. Rot diseases of carrot and rapeseed caused by Typhula species under snow in Hokkaido, Japan. J Gen Plant Pathol 82, 286–291 (2016). https://doi.org/10.1007/s10327-016-0675-6
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DOI: https://doi.org/10.1007/s10327-016-0675-6