Basidiomycetous Fungi Associated with Butt Rot Disease of Cryptomeria japonica in the Aso District, Kumamoto Prefecture, Japan.

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  • Noguchi T.
    The United Graduate School of Agricultural Sciences, Ehime University
  • Ohtani Y.
    Faculty of Agriculture, Kochi University
  • Hattori T.
    Forestry and Forest Products Research Institute
  • Abe Y.
    Kyushu Research Center, Forestry and Forest Products Research Institute
  • Sahashi N.
    Kyushu Research Center, Forestry and Forest Products Research Institute

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  • 熊本県阿蘇地方におけるスギ人工林の根株腐朽被害に関与する担子菌類
  • クマモトケン アソ チホウ ニ オケル スギ ジンコウリン ノ ネカブ フキュウ ヒガイ ニ カンヨスル タンシキンルイ

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Abstract

To clarify the causal fungus of butt rot disease of Cryptomeria japonica (Sugi), we isolated basidiomycetous fungi from decayed stumps in 12 plantations 40 to 83 years old in the Aso district, Kumamoto Prefecture, Japan, and characterized two major fungi isolated. In the plantations studied, eight kinds of basidiomycetes having different morphological characteristics were isolated from rotted stumps, two of which were the major fungi. Basidiomycete-A was isolated at a relatively high frequency only in one plantation at Minami-Oguni. On the other hand, Basidiomycete-B was isolated at a high frequency in all plantations surveyed, which suggested that this fungus was widely distributed throughout the Aso district. The wood block decay test confirmed that both Basidiomycete-A and -B have ability to decay wood block. From the results, we concluded that Basidiomycete-A and/or -B were responsible, at least partly, for butt rot disease of C. japonica in the Aso district.

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