As you may be aware, the media have reported a new and very serious threat to the UK countryside in the form
of a fungus Chalara fraxinea. This fungus has the capacity to decimate our
native ash tree population, in much the same way as Dutch Elm disease wiped out
the elm population last century. The infection is nowhere near us at present,
but since infected trees moved for the nursery trade are the main means of
long-distance spread, it could crop up anywhere.
It is important that we monitor ash trees this winter and during the spring
and early summer months next year. The pdf documents in the links below (courtesy
of The Forestry Commission) indicate what to look for. Lesions appear
on the bark surface and can grow considerably in size. The bark underneath is often
discoloured and grey or brownish. It can
kill the tree, or lead to substantial die back of the crown. The leaves wilt from the tips but, as many other conditions
also do this, the main ID feature is the bark.
Pictorial Guide to Ash Dieback Disease
Ash Dieback Disease Pest Alert
At the request of the Forestry Commission and Defra,
can you:
1) Look out for signs or symptoms
of the disease in ash trees.
2) Send any photos or descriptions,
plus your location and contact details to one of the contacts listed by the Forestry Commission:
• Forest Research Disease Diagnostic Advisory Service
Telephone: 01420 23000 or Send email
• Forestry Commission Plant Health Service
Telephone: 0131 314 6414 or Send email
• Fera Plant Health and Seeds Inspectorate
Telephone: 01904 465625 or Send email
If you have a camera and GPS on your phone you can use a new app, Ashtag, developed by the University of East Anglia to track the spread of the disease. Alternatively, you can manually upload a picture from your camera to their website: http://ashtag.org/
If you have a camera and GPS on your phone you can use a new app, Ashtag, developed by the University of East Anglia to track the spread of the disease. Alternatively, you can manually upload a picture from your camera to their website: http://ashtag.org/
At this stage the disease appears
confined to the east of England but, as with many fast moving
pathogens, early containment and identification is essential. Wherever you
are, please check the health of your local ash trees.
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