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Symptoms
- Shoot dieback
- Necrotic bark on shoots
- Necrotic tops, leaves and branchlets
- Bark wounds
- Stem cankers
- Caused most probably by an ascomycetous fungus Chalara fraxinea T. Kowalski sp. nov.
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Foto: Pia Barklund (click to enlarge) |
History
- The symptoms were first observed in Poland and Lithuania in early 1990´s
- Since mid 1990´s, in Latvia and Estonia
- Since the beginning of 2000´s, in Germany, Denmark, Sweden and the Åland archipelago of Finland
- Not observed in Norway, Iceland or continental Finland
- Holotypus: cultura desiccata ex ramo Fraxini excelsioris, in herbario Zuerich (Z + ZT), T. Kowalski legit, Polonia, Włoszczowa, 06.12.2000 isolata, cultura viva in CBS, Utrecht, Hollandia.
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Foto: Pia Barklund (click to enlarge) |
More information
Literature
- Lygis, V., Vasiliauskas, R, Larsson, K.H. & Stenlid, J. 2005. Wood-inhabiting fungi in stems of Fraxinus excelsior in declining ash stands of northern Lithuania, with particular reference to Armillaria cepistipes. Scandinavian Journal of Forest Research 20, 337-346.
- Barklund, P. 2005. Sjukdom på ask spridd över hela Syd-och Mellansverige. Skogseko 3: 9.
- Barklund, P. 2006. Okänd svamp bakom askskottsjukan. Värsta farsoten som drabbat en enskild trädart. Skogseko 3: 10-11.
- Kowalski, T. 2006. Chalara fraxinea sp. nov. associated with dieback of ash (Fraxinus excelsior) in Poland. Forest Pathology 36: 264-270
- Thomsen, I.M.; Skovsgaard, J.P. 2006. Skoven 9: 408-411.
- Thomsen I.M.; Skovsgaard, J.P., Barklund, P. & Vasaitis, R. 2007. Svampesygdom er årsag til toptørre i ask. Skoven 10: 234- 236
PATHCAR - Virtual Centre of Advanced Research in Forest Pathology
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