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Temporal changes in pathogenicity and fungicide resistance in Pseudoperonospora cubencis populations

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F07%3A00003593" target="_blank" >RIV/61989592:15310/07:00003593 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Temporal changes in pathogenicity and fungicide resistance in Pseudoperonospora cubencis populations

  • Original language description

    Temporal changes in the pathogenicity and fungicide resistance of populations of Pseudoperonospora cubensis (cucurbit downy mildew) in the Czech Republic from 2001 to 2003 were observed. Altogether, 152 P. cubensis isolates originated from Cucumis sativus infected leaves in 10 Czech regions were analysed for pathogenic variation, 74 of which were used for fungicide resistance screening. During the period studied, there was a considerable increase of pathogenicity that was expressed by a higher complexity of pathotypes and their increasing frequency. However, the diversity of the pathogen populations in general decreased. A similar phenomenon was observed in fungicide (metalaxyl, phosetyl-Al, propamocarb) effectiveness, which varied considerably. Propamocarb was the most effective, but the methalaxyl was ineffective and resistance to this fungicide was fixed in the pathogen populations. For phosetyl-Al, there was observed evidence of the start of selection for higher resistance in the P

  • Czech name

    Sezónní změny v patogenitě a rezistenci k fungicidům v populaci plísně okurkové

  • Czech description

    V populaci Pseudoperonospora cubensis (plísně okurky) byly pozorovány časové změny v patogenitě a rezistenci k fungicidům v průběhu let 2001 až 2003 v České republice. Celkem 152 P. cubensis izolátů pocházejících z infikovaných listů Cucumis sativus z 10Českých regionů bylo analyzováno na patogenní variabilitu, 74 z nich na testování rezistence vůči fungicidům. Během sledovaného období byl pozorován nárůst patogenity, což lze vysvětlit vyšší komplexností patotypů a jejich vzrůstající frekvencí. Nicménědiverzita populace patogena obecně poklesla. Podobný fenomén byl pozorován v účinnosti fungicidů (metalaxyl, fosetyl-Al, propamokarb), která se značně lišila. Propamokarb byl nejúčinnější, avšak metalaxyl byl neúčinný a rezistence k tomuto fungicidu byla v populaci patogena fixována. Pro fosetyl-Al byl v populaci P. cubensis pozorován doklad začátku selekce směrem k vyšší rezistenci.

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    GF - Diseases, pests, weeds and plant protection

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/QD1357" target="_blank" >QD1357: Systems of protection of field vegetables against pest organisms</a><br>

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2007

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Acta Horticulturae

  • ISSN

    0567-7572

  • e-ISSN

  • Volume of the periodical

    N

  • Issue of the periodical within the volume

    731

  • Country of publishing house

    NL - THE KINGDOM OF THE NETHERLANDS

  • Number of pages

    10

  • Pages from-to

    327-336

  • UT code for WoS article

  • EID of the result in the Scopus database