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New highly aggressive pathotype 354 of Plasmopara halstedii in German sunflower fields

Author

Listed:
  • Otmar Spring
  • Reinhard Zipper

    (Institute of Botany, University of Hohenheim, Stuttgart, Germany)

Abstract

Downy mildew of sunflower is a recurrent threat for crop production and a permanent challenge for resistance breeding. Since 2016, a new pathotype of the oomycete Plasmopara halstedii has been found in fields of cutting sunflower in Southern Germany. Infection assays based on sunflower differential lines identified the pathogen as pathotype 354 which has not yet been described anywhere else. The new pathotype readily infected the host lines Ha-304, RHA-265, PM13, 803-1, and Ha-335, whereas RHA-274, PM17, HAR-4, and QHP1 remained uninfected. It is the first isolate of Plasmopara halstedii to overcome the Pl-6 resistance of sunflower in Germany.

Suggested Citation

  • Otmar Spring & Reinhard Zipper, 2018. "New highly aggressive pathotype 354 of Plasmopara halstedii in German sunflower fields," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 54(2), pages 83-86.
    • Handle: RePEc:caa:jnlpps:v:54:y:2018:i:2:id:99-2017-pps
    DOI: 10.17221/99/2017-PPS
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    References listed on IDEAS

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    1. Michaela Sedlářová & Romana Pospíchalová & Zuzana Drábková Trojanová & Tomáš Bartůšek & Lucie Slobodianová & Aleš Lebeda, 2016. "First Report of Plasmopara halstedii New Races 705 and 715 on sunflower from the Czech Republic - Short Communication," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 52(3), pages 182-187.
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    Cited by:

    1. Katalin Körösi & Attila Kovács & Nisha Nisha & István Bóta & Mihály Perczel & Ahmed Ibrahim Alrashid Yousif & József Kiss & Rita Bán, 2021. "New data on pathotype distribution and mefenoxam tolerance of Plasmopara halstedii in Hungary," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 57(1), pages 31-37.

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    2. Katalin Körösi & Attila Kovács & Nisha Nisha & István Bóta & Mihály Perczel & Ahmed Ibrahim Alrashid Yousif & József Kiss & Rita Bán, 2021. "New data on pathotype distribution and mefenoxam tolerance of Plasmopara halstedii in Hungary," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 57(1), pages 31-37.
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