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Bark disease on elm
Observed: 7th August 2011 By: seeckert
Added: 9th August 2011
This young elm tree is affected by (presumably) Eriophyid mites. However, does anyone know what causes the bark to become corky (red arrow)? I've seen that phenomenon on a number of sites, and also on hawthorns. Is this a viral, bacterial or fungal infection?