Pythium Rot of Broccoli Caused by Pythium ultimum Trow var. ultimum.

  • KUBOTA Masaharu
    National Research Institute of Vegetables, Ornamental Plants and Tea
  • TEZUKA Nobuo
    National Research Institute of Vegetables, Ornamental Plants and Tea
  • ABIKO Kazuo
    National Research Institute of Vegetables, Ornamental Plants and Tea
  • ISHII Masayoshi
    National Research Institute of Vegetables, Ornamental Plants and Tea

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Other Title
  • Pythium ultimum Trow var.ultimumによるブロッコリーのピシウム腐敗病(新称)
  • Pythium ultimum Trow var.ultimum ニヨル ブロ

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Description

A stem rot of broccoli caused by a species of Pythium was found at Tsu city, Mie Prefecture in October 1993. The infected stems appeared white rot with aqueous edge. The morphology of sexual organs made by the isolate closely fits van der Plaats-Niterink's description of Pythium ultimum Trow var. ultimum. The isolate was pathogenic to seedlings of many crop species. This is the first report on stem rot of broccoli caused by Pythium ultimum Trow var. ultimum in Japan.

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