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How to deal with white fungus/mould on apple tree


Symptoms are white fungus/mould or whatever as above and dieback on certain leaf sets at the end of the branches. Also last year (I've only been in the house a year), the fruit sat on the tree and mummified.
Any ideas what to do for the best?
Thanks,
TT
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My instinct is to cut off affected parts and burn them, then bleach the secateurs. Wondering if this would do it but obviously I won't get out of reach bits with this method.
That looks like it could be woolly aphid rather than a fungus. Wooly aphid is very common on apple trees. Check the RHS advice on it, here:
https://www.rhs.org.uk/advice/profile?PID=724
Thanks Bob, I'll check that out, thank you.
Looks like Woolly Aphid to me too - watch out for families of long tailed tits swarming over your tree - they love it - every cloud has a silver lining
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
ooh, yes Dove, long tailed tits have been spotted and commented on here - my hubs says he's not seen them before and he was a kid with a ladybird book of garden birds back in the 70s!!
Next door neighbour mentioned them too. Good to know, thanks.
Some 30 years ago I planted a crab apple about 10 ft away from our then dining room window.
Almost immediately Woolly Aphids took up residence - the delight of watching the long tailed tit family flock over the tree every winter was well worth the rather poor growth and even worse flowering and fruiting managed by the tree.
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.