By Lizzyw
Lincolnshire,
United Kingdom 
I have a very old apple tree and lines of what looks like white mould has appeared where the bark is cracked. Part of it was already dead when I came last November. It is producing apples after a good blossom. Does anyone know what it is and how I can treat it. It would be a shame to lose it, thanks
7 Jun, 2011
Not uncommon on very old trees - because the bark is split and cracked, damp gets underneath and if the conditions are right, moulds and fungus grow. Not much you can do about it - if it starts growing bracket fungus from its trunk, time to take it out.
11 Jun, 2011