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Mycological Progress

, Volume 10, Issue 4, pp 415–422 | Cite as

Recent outbreaks of downy mildew on grape ivy (Parthenocissus tricuspidata, Vitaceae) in Germany are caused by a new species of Plasmopara

  • Marco ThinesEmail author
Original Article

Abstract

Plasmopara viticola is one of the most destructive pathogens in grape production and was introduced from North America to Europe more than a century ago. The pathogen is thought to affect a broad range of hosts in the Vitaceae, including the genera Vitis and Parthenocissus. However, the latter has not previously been reported as a host in Germany. Here, it is shown on the basis of phylogenetic and morphological data that recent outbreaks of downy mildew on Parthenocissus tricuspidata in the Stuttgart area of Southern Germany are not caused by Plasmopara viticola, but by an undescribed species introduced here as Plasmopara muralis. The new species has rapidly spread in the Stuttgart area throughout the past 2 years and poses a potential threat to ornamental vines grown as wall cover should its spread not be controlled.

Keywords

Downy mildews Molecular phylogeny Morphology Peronosporaceae Taxonomy 

Notes

Acknowledgements

I am grateful for the support of Ndambi Beninweck for help with measurements, and of Fabian Runge and Christoph Rost, who helped in various aspects of this study. The present study was financially supported by the research funding programme “LOEWE – Landes-Offensive zur Entwicklung Wissenschaftlich-ökonomischer Exzellenz" of the Ministry of Higher Education, Research, and the Arts of Hesse and by a grant from the German Science Foundation (DFG).

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Copyright information

© German Mycological Society and Springer 2010

Authors and Affiliations

  1. 1.Biodiversity and Climate Research Centre (BiK-F)Frankfurt (Main)Germany
  2. 2.Department of Biological Sciences, Institute of Ecology, Evolution and DiversityJohann Wolfgang Goethe UniversityFrankfurt (Main)Germany

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