著者

森 万菜実 岩舘 康哉 藤崎 恒喜 三澤 知央

出版者

北日本病害虫研究会

雑誌

北日本病害虫研究会報 (ISSN:0368623X)

巻号頁・発行日

vol.2021, no.72, pp.19-24, 2021-12-15 (Released:2022-02-23)

参考文献数

17

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In June 2019, basal petiole rot of wasabi seedlings with withering symptom was observed in Iwate, Japan. Isolates from diseased tissues were identified as Rhizoctonia solani anastomosis group (AG)-2-1·Subset 2 and AG-2-1·clade HK on the basis of cultural morphology, temperature-dependent growth characteristics, hyphal anastomosis reactions, and DNA sequences of the rDNA-ITS region. Artificial inoculation with three isolates resulted in basal petiole rot and withering of wasabi seedlings. The occurrence of damping-off on wasabi caused by R. solani has been reported in Japan (Suzuki, 1976); however, details of AG and locations were not clarified. Since the AGs of R. solani causing this damping-off were initially found in Japan, we propose to the inclusion of R. solani AG-2-1·Subset 2 and AG-2-1·clade HK as one of the pathogens of the disease.