NDLI: Investigations on the occurrence of the Dutch elm disease pathogens in Austria

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Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch : Volume 119

Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch : Volume 118

Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch : Volume 117

Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch : Volume 116

Investigations on the occurrence of the Dutch elm disease pathogens in Austria

Content Provider	Springer Nature Link
Author	Kirisits, Thomas Krumböck, Susanne Konrad, Hei Pennerstorfer, Josef Halmschlager, Erhard
Copyright Year	2001
Abstract	Das Vorkommen der Erreger des Ulmensterbens in Österreich wurde in den neunziger Jahren des vorigen Jahrhunderts untersucht. Von insgesamt 174 Isolaten, die zwischen 1993 und 1997 in verschiedenen Teilen Österreichs gesammelt worden waren, konnten 150 aufgrund ihrer Wachstumsrate bei 20 °C und 33 °C sowie der Morphologie der Kultur auf Oxoid-Malzextraktagar der aggressiven ArtO. novo-ulmi zugeordnet werden. Die weniger aggressive ArtO. ulmi wurde kein einziges Mal nachgewiesen und kommt vermutlich in Österreich nicht mehr vor. Ein Isolat wies eine einzigartige Kulturmorphologie auf, die weder der vonO. ulmi noch jener vonO. novo-ulmi entsprach. Dieses Isolat ist möglicherweise durch Hybridisierung vonO. ulmi undO. novo-ulmi entstanden. Ein Teil (<14 %) der Isolate ist aufgrund ungünstiger Bedingungen während der Stammhaltung degeneriert, zeigte untypisches Wachstum in Kultur und konnte daher nicht bestimmt werden.O. novo-ulmi konnte in den Bundesländern Wien, Nieder- und Oberösterreich, Burgenland, Steiermark, Kärnten und Tirol festgestellt werden und scheint in weiten Teilen des Verbreitungsgebietes der in Österreich heimischen Ulmenarten vorzukommen. Es ist damit zu rechnen, dassO. novo-ulmi weiterhin große Schäden in Mitteleuropa verursachen wird und früher oder später auch in Gebiete und Waldbestände vordringen wird, in denen bisher geringe oder keine Schäden durch die Ulmenwelke aufgetreten sind.The occurrence of the Dutch elm disease (DED) pathogens in Austria was investigated in the 1990s. 174 isolates of the DED pathogens were collected between 1993 and 1997 in various areas of Austria. Based on growth rates at 20 °C and 33 °C and on assessment of colony morphologies on Oxoid malt extract agar, 150 of these isolates were identified asO. novo-ulmi. The less aggressiveO. ulmi did not occur and has most likely disappeared from Austria. One single isolate had an unique colony morphology resembling neither that ofO. ulmi nor that ofO. novo-ulmi. This isolate has probably arisen from hybridisation ofO. ulmi andO. novo-ulmi. A portion (<14 %) of the isolates had been degenerated due to inappropriate storage conditions and showed untypical growth characteristics and colony morphologies. These isolates could therefore not be identified.O. novo-ulmi was isolated in the Austrian provinces of Vienna, Lower and Upper Austria, Burgenland, Styria, Carinthia and Tyrol and appears to occur throughout the distribution range of the elm species that are native to Austria.O. novo-ulmi will most likely continue to cause considerable damage in central Europe and it will also continue to spread into areas and forest stands with previously low incidence or absence of the disease.
Starting Page	231
Ending Page	241
Page Count	11
File Format	PDF
ISSN	00158003
Journal	Forstwissenschaftliches Centralblatt vereinigt mit Tharandter forstliches Jahrbuch
Volume Number	120
Issue Number	1-6
e-ISSN	14390337
Language	English
Publisher	Springer-Verlag
Publisher Date	2001-01-01
Publisher Place	Berlin, Heidelberg
Access Restriction	Subscribed
Subject Keyword	Dutch elm disease (DED) Ophiostoma ulmi Ophiostoma novo-ulmi Forest Pathology Mycology Forestry Plant Sciences Plant Ecology
Content Type	Text
Resource Type	Article
Subject	Plant Science Forestry

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