sdu faculty of forestry journal special edition 2009 - Orman Fakültesi

SDU Faculty of Forestry Journal
Serial: A, Number: Special Issue, Year: 2009, ISSN: 1302-7085, Page: 124-128
ASH DIEBACK IN THE CZECH REPUBLIC
Petr ŠŤASTNÝ 1 , Dagmar PALOVČÍKOVÁ 1 , Libor JANKOVSKÝ 1*
1 Mendel University of Agriculture and Forestry, Faculty of Forestry and Wood Technology,
Department of Forest Protection and Wildlife Management, Zemědělská 3, 613 00 Brno, Czech
Republic
ABSTRACT
*jankov@mendelu.cz
Ash dieback was observed in Baltic states since middle of 90`s, however the progress
of disease was observed within last years. The new fungus Chalara fraxinea was described
as a causal agent of ash dieback in 2006. The ash dieback was observed in some local
areas in the Czech republic since middle of 90`s and it was connected mostly with extreme
climatic conditions. Progress of disease was observed since 2003. Ash decline was
observed practically in all regions of the CR, C. fraxinea were confirmed in the CR in
September 2007. Occurrence of Chalara fraxinea was confirmed in Fraxinus excelsior
and F. angustifolia. Perfect stage of C. fraxinea Hymenscyphus albidus is known as
common saprophytes on leaf-stalks. In areas with esh dieback was observed aphid
Prociphilus bumeliae, however the role of this insect is actually discus.
Key words: ash decline, Chalara fraxinea, ash, ash dieback
1. INTRODUCTION
Common ash (Fraxinus excelsior) is threatened in large parts of Europe by ash
dieback (eg. Cech, 2006; Lygis et al., 2005). Chalara fraxinea has been recently
determined to be the causal agent of this disease (Kowalski, 2006; Kowalski &
Holdenrieder, 2009a; Bakys et al., 2009).
Chalara fraxinea was reported in Poland (Kowalski, 2006), Denmark (Thomsen
et al., 2007), Germany (Schumacher et al., 2007), Austria (Halmschlager and
Kirisits, 2008), Hungary (Szabo, 2008a; 2008b), Finland (EPPO, 2008a), Lithuania
(R. Vasaitis, personal communication), Norway (EPPO, 2008b; H. Solheim,
personal communication), Sweden (Bakys et al., 2009), Switzerland (Engesser and
Holdenrieder, unpublished) and France (Ioos, personal communication). Symptoms
of ash dieback were also reported from Slovakia in 2008 (Kunca, personal
communication); the disease was noted also in Slovenia (Ogris et al., 2009) and
Croatia (own observation) in 2008. From the Czech republic is pathogen reported
from 2007 (Jankovský and Holdenrieder, 2009). The ascomycete Hymenoscyphus
albidus (Roberge ex Desm.) W. Phillips was identified as the teleomorph of C.
fraxinea by Kowalski and Holdenrieder (2009b).
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