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Distribution and harmfulness of Plasmopara halstedii on sunflower in the Czech Republic

Author

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  • Michaela SEDLÁŘOVÁ

    (Department of Botany, Faculty of Science, Palacký University in Olomouc, Olomouc, Czech Republic)

  • Zuzana TROJANOVÁ

    (Department of Botany, Faculty of Science, Palacký University in Olomouc, Olomouc, Czech Republic)

  • Aleš LEBEDA

    (Department of Botany, Faculty of Science, Palacký University in Olomouc, Olomouc, Czech Republic)

Abstract

In 2007-2012 the first detailed study of P. halstedii distribution and severity was performed in the Czech Republic by monitoring altogether 128 localities. Incidence of the pathogen was recorded at seven localities in south-eastern (Central and South Moravia) and central parts (East and Central Bohemia) of the country; at only four localities the occurrence of sunflower downy mildew symptoms and pathogen sporulation were recorded repeatedly. In all cases the primary infection prevailed, and the severity of infections was rather low. The majority of records were for sunflower experimental fields (e.g. fields of Central Institute for Supervising and Testing in Agriculture. Brno-Chrlice, Czech Republic), one record came from a commercial field and one record from a hobby field. Results of surveys indicate that reservoirs of primary inoculum likely exist in the soil contaminated by P. halstedii oospores in these habitats, but additional transfer by infected seed may be possible. Historical and geographical consequences of recorded infections are discussed, as well as virulence variation in the Czech pathogen populations which is currently in the process of investigation.

Suggested Citation

  • 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.
    • Handle: RePEc:caa:jnlpps:v:49:y:2013:i:1:id:62-2012-pps
    DOI: 10.17221/62/2012-PPS
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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.
    2. 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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