Pink root rot,a revised name of brown root rot of gentian,and the causal fungi,Pyrenochaeta gentianicola sp. nov. andP. terrestris in Japan |
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| Authors: | Tsuneo Watanabe Syoji Imamura |
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| Affiliation: | (1) Forestry and Forest Products Research Institute, P.O. Box 16, Tsukuba S.C., 305 Iabaraki, Japan;(2) Nagano Prefectural Nansin Experiment Station, Shimoichida 3,333, Takamori, Shimoina, 399-31 Nagano, Japan |
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| Abstract: | Cultivated gentian (Gentiana scabra var.buergeri) has been seriously damaged by pink root rot since the 1970s. Diseased plants finally collapse after wilting and stunting. More than 40 fungal genera were found to be associated with roots of mature and immature diseased plants or seeds. Among these fungi,Pyrenochaeta gentianicola sp. nov. andP. terrestris were almost always associated with the diseased plants. Their morphologies and temperature responses were compared, and their pathogenicity was also demonstrated by artificial inoculation tests.Part of this work was conducted at the National Institute of Agricultural Sciences (presently National Institute of Agro-Environmental Sciences), Tsukuba S.C., Ibaraki 305, Japan by T. Watanabe. |
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| Keywords: | associated fungus flora gentian pathogenicity pink root rot Pyrenochaeta gentianicola Pyrenochaeta terrestris |
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