What is wrong with this walnut tree?
By Gilesc
United Kingdom 
The base of the tree doesn't look any worse than 6 months ago when I last saw it.
Maybe there was a nest of some sort and they have now gone or is it some kind of mould or fungus ?
The rest of the tree seems ok and is producing walnuts which look healthy enough.
Can anyone help?
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11 Jul, 2008
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