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Spread of the North American snowberry powdery mildew fungus, Erysiphe symphoricarpi (syn. Microsphaera symphoricarpi), to Europe

Published online by Cambridge University Press:  13 November 2002

Levente KISS
Affiliation:
Plant Protection Institute, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 102, Hungary
Adrien BOLAY
Affiliation:
Conservatoire et Jardin botaniques de la Ville de Geneve, Case postale 60, CH-1292 Chambesy, Switzerland
Susumu TAKAMATSU
Affiliation:
Faculty of Bioresources, Mie University, Tsu 514-8507, Japan
Roger T. A. COOK
Affiliation:
Central Science Laboratory, DEFRA, Sand Hutton, York, YO41 1LZ, UK
Saranya LIMKAISANG
Affiliation:
Faculty of Agriculture, Chiang Mai University, Chiang Mai 50200, Thailand
Nosratollah ALE-AGHA
Affiliation:
University of Essen, Department of Botany and Plant Physiology, FB-9 Botanik, Universitatstrasse 5, D-45117 Essen, Germany
Orsolya SZENTIVÁNYI
Affiliation:
Plant Protection Institute, Hungarian Academy of Sciences, H-1525 Budapest, P.O. Box 102, Hungary
Robin J. BOAL
Affiliation:
Washington State University, Tree Fruit Research, Wenatchee, WA 98801, USA
Peter JEFFRIES
Affiliation:
Research School of Biosciences, University of Kent, Canterbury, Kent CT2 7NJ, UK
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Abstract

Recently, a powdery mildew anamorph infecting snowberry (Symphoricarpos albus) has been reported as a new plant pathogen in several European countries. We report here its occurrence in the UK, Germany and, for the first time, Switzerland. Based on morphological and scanning electron microscope (SEM) patterns, this novel pathogen appeared similar to the anamorph of a common North American powdery mildew, Erysiphe symphoricarpi (syn. Microsphaera symphoricarpi). A phylogenetic analysis of the internal transcribed spacer (ITS) sequences of the ribosomal DNA (rDNA) of an English and a North American snowberry powdery mildew fungus showed that they are conspecific. Ascomata of the pathogen were found only in one European collection, that being in Germany in 2002. The similarity in morphology of the ascomata also confirmed the co-identity of the European and American snowberry powdery mildews.

Type
Research Article
Copyright
© The British Mycological Society 2002

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Spread of the North American snowberry powdery mildew fungus, Erysiphe symphoricarpi (syn. Microsphaera symphoricarpi), to Europe
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