United Kingdom 
its coming out of the stump where branches used to be its like a creamy yellowy white colour
20 May, 2010
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« I have an acer 'Little Princess' that is two years old and has done really...
If the tree is still alive further up (I can't tell from the picture) and you want to keep it, I'm guessing you cut the lower branches fairly recently, or within the last few months. Clean out the area and apply Arbrex is about all you can do.
20 May, 2010