miked's picture

_MG_6963 ash dieback?

Observed: 3rd August 2013 By: miked
iSpot team
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I visit this area each year and last year the ash trees were fine but this year I guess over 50% of them were severely damaged possibly by Hymenoscyphus pseudoalbidus (Chalara fraxinea). This amounts to hundreds of trees in this town and many more along the railways towards Moscow.
Much of the crown had few if any leaves but often there was strong regrowth from part of the trunk. I suspect many if not all of the trees will be removed so will not see if they recover. one potentially confounding factor is that it was a severe winter so the trees may have been damaged by the cold rather than damage caused by the disease, however locals say that cold damage looks quite different to this.
Ash dieback is known to have reached Russia.
If the disease is as swift and severe as this when it sweeps through UK then I can see why people are so worried about it.
Note the effects are severe on lines of very similar trees but the ones that were planted more recently were not so badly affected (yet).

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marksteer's picture

Thanks your posting from

Thanks your posting from Russia. Ash die back is not in my locality - South Wales - as far as I know. Not far away in Monmouthshire I think
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dejayM's picture


That looks dire Mike - kinda goes with the architecture there.
But goodness, as you say, if that happens in the UK even 'man-in-the-street' will talk about it.
We hold our breath, not too hopefully, in Orkney.


miked's picture

Comment from experts at

Comment from experts at Forestry research (research and pest/disease arm of the UK forestry commission):
"This is dieback of green ash Fraxinus pensylvannica caused by emerald ash borer. It is a major issue in Moscow and has been well reported. It's not Chalara." The experts were in Moscow this summer looking at the problem.

I am not convinced that the trees are all F. pensylvannica as some of them were not planted and the native species in that area is F. excelsior.