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

Michaela Sedlářová, Zuzana Trojanová and Aleš Lebeda
Additional contact information
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

Plant Protection Science, 2013, vol. 49, issue 1, 1-10

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.

Keywords: sunflower downy mildew; Helianthus annuus; disease incidence; disease severity; pathogen population; quarantine disease (search for similar items in EconPapers)
Date: 2013
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
http://pps.agriculturejournals.cz/doi/10.17221/62/2012-PPS.html (text/html)
http://pps.agriculturejournals.cz/doi/10.17221/62/2012-PPS.pdf (application/pdf)
free of charge

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:caa:jnlpps:v:49:y:2013:i:1:id:62-2012-pps

DOI: 10.17221/62/2012-PPS

Access Statistics for this article

Plant Protection Science is currently edited by Ing. Eva Karská, (Executive Editor PPS)

More articles in Plant Protection Science from Czech Academy of Agricultural Sciences
Bibliographic data for series maintained by Ivo Andrle ().