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New data on pathotype distribution and mefenoxam tolerance of Plasmopara halstedii in Hungary

Author

Listed:
  • Katalin Körösi

    (Szent István University, Institute of Plant Protection, Gödöllő, Hungary
    PlasmoProtect, Szarvas, Hungary)

  • Attila Kovács

    (Syngenta, Budapest, Hungary)

  • Nisha Nisha

    (Szent István University, Institute of Plant Protection, Gödöllő, Hungary)

  • István Bóta

    (Szent István University, Institute of Plant Protection, Gödöllő, Hungary)

  • Mihály Perczel

    (PlasmoProtect, Szarvas, Hungary)

  • Ahmed Ibrahim Alrashid Yousif

    (Szent István University, Institute of Plant Protection, Gödöllő, Hungary)

  • József Kiss

    (Szent István University, Institute of Plant Protection, Gödöllő, Hungary)

  • Rita Bán

    (Szent István University, Institute of Plant Protection, Gödöllő, Hungary
    PlasmoProtect, Szarvas, Hungary)

Abstract

Sunflower downy mildew (Plasmopara halstedii) is one of the major diseases that can be controlled by using resistant cultivars and seed dressings; however, several isolates have developed tolerance to some fungicides and the resistance has also been overcome by new pathotypes. We aimed to examine the pathotype distribution in Hungary and to test the pathotypes' mefenoxam sensitivity. The isolates, which provided the basis of the research were collected from different regions of Hungary between 2014 and 2017 and, later, their pathotypes were identified. According to our results, pathotype 704 was one of the most widespread in Hungary, but pathotype 730, pathotype 724 and pathotype 700 were also detected. Seven out of ten isolates caused relatively high disease rates on the mefenoxam-treated and inoculated sunflower plants with P. halstedii. The pathogen has a high genetic variability which enhances the possibility to develop fungicide resistance. Furthermore, this variability can easily contribute to the breakdown of the resistant genes of the resistant hybrids. Both features can reduce the effectiveness of management; therefore, the continuous monitoring of this oomycete is very important.

Suggested Citation

  • 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.
    • Handle: RePEc:caa:jnlpps:v:57:y:2021:i:1:id:73-2020-pps
    DOI: 10.17221/73/2020-PPS
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    References listed on IDEAS

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    1. 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.
    2. Otmar Spring & Javier Gómez-Zeledón, 2020. "Influence of oxathiapiprolin on preinfectional and early infection stages of Plasmopara halstedii, downy mildew of the sunflower," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 56(2), pages 83-91.
    3. 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.
    4. Michaela SEDLÁŘOVÁ & Zuzana TROJANOVÁ & Aleš LEBEDA, 2013. "Distribution and harmfulness of Plasmopara halstedii on sunflower in the Czech Republic," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 49(1), pages 1-10.
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    Cited by:

    1. Maria Iwebor & Tatiana Antonova & Nina Araslanova & Svetlana Saukova & Yulia Pitinova & Ksenia Eliseeva & Aleksey Belorutskiy, 2022. "The first report of Plasmopara halstedii race 337 in the Russian Federation," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 58(1), pages 76-80.

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    4. Maria Iwebor & Tatiana Antonova & Nina Araslanova & Svetlana Saukova & Yulia Pitinova & Ksenia Eliseeva & Aleksey Belorutskiy, 2022. "The first report of Plasmopara halstedii race 337 in the Russian Federation," Plant Protection Science, Czech Academy of Agricultural Sciences, vol. 58(1), pages 76-80.

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