Search Observatree
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Chalara dieback of ash - winter symptoms
Video • 00:01:35
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Chalara dieback of ash - Spring symptoms
Video • 00:02:28
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Chalara ash dieback poster
PDF • 721 KB
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Blog
Ash Dieback in the National Trust
Ash is one of our most important tree species both ecologically and culturally, and is generally considered to be the third most common tree in British woods, comprising around 12% of woodland tree cover.
Luke Barley • 23 Aug 2021
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Blog
Host of the Month - Ash
Matt Parratt, Observatree Scientific Coordinator, looks at common ash, chalara ash dieback, and emerald ash borer
Matt Parratt • 04 Dec 2023
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Pests and diseases
Chalara Dieback of Ash
A chronic fungal disease believed to have originated in Asia, now widespread across Europe.
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Pests and diseases
Emerald Ash Borer
Native to Asia and Eastern Russia, the emerald ash borer is a threat to our already vulnerable ash trees.
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Blog
Host of the month - Ash
Matt Parratt highlights Common ash (Fraxinus excelsior), the well-known ash dieback disease and its associated pest, Emerald ash borer.
Matt Parratt • 14 Nov 2024
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Chalara dieback of ash training video
Video • 00:08:10
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Ash Dieback detailed information
External link