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Root and stem rot of chrysanthemum caused by five Pythium species in Japan

  • Disease note
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Abstract

Root and stem rot with wilt of above ground parts of cultivated chrysanthemums was first found in Ibaraki, Toyama and Kagawa prefectures, Japan in 2002 and 2003. Pythium species were isolated from the diseased tissues and identified as P. dissotocum, P. oedochilum, P. sylvaticum, P. ultimum var. ultimum and asexual strains of P. helicoides based on their morphologies and sequences of rDNA-ITS region. All the Pythium species were strongly pathogenic to chrysanthemums in pot conditions and were reisolated from the inoculated plants. Because Pythium root and stem rot of chrysanthemum has never been reported in Japan, we propose that this is a new disease that can be caused by the five Pythium species.

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Acknowledgments

We sincerely thank Mikio Kusunoki, Kagawa Prefectural Agricultural Experiment Station, Plant Protection Office and Katsumi Sato, Toyama Prefectural Government, Agricultural Technique Department for helping us to collect the diseased samples of chrysanthemum.

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Authors and Affiliations

  1. National Institute of Livestock and Grassland Science, Senbonmatsu 768, Nasushiobara, Tochigi, 329-2793, Japan

    Takao Tsukiboshi

  2. National Institute of Floricultural Science, Fujimoto 2-1, Tsukuba, Ibaraki, 305-8519, Japan

    Yoshiaki Chikuo, Yoko Ito & Yosuke Matsushita

  3. River Basin Research Center, Gifu University, Yanagido 1-1, Gifu, 501-1193, Japan

    Koji Kageyama

Authors
  1. Takao Tsukiboshi
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  2. Yoshiaki Chikuo
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  3. Yoko Ito
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  4. Yosuke Matsushita
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  5. Koji Kageyama
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Correspondence to Takao Tsukiboshi.

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Tsukiboshi, T., Chikuo, Y., Ito, Y. et al. Root and stem rot of chrysanthemum caused by five Pythium species in Japan. J Gen Plant Pathol 73, 293–296 (2007). https://doi.org/10.1007/s10327-007-0015-y

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  • DOI: https://doi.org/10.1007/s10327-007-0015-y

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