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Apple tree rotting bark and wood lice

Hi everyone, any advice gratefully received. 
We have 3 apple trees. Two have bark falling off and seem to have wood lice underneath. We moved in 10 tears ago and the trees were established already so must be 15-20 years old atleast and used to produce a lot of fruit. Any advice on what could be causing it and how to treat it? I've attached a picture of all 3. As you can see there is very little leaves on the two affected and a close up of the bark. Many thanks! p


  • BobTheGardenerBobTheGardener Posts: 11,391
    Sorry to be the bearer of bad news, but both of those trees on the left have been very badly affected by canker and are on their last legs.  Canker slowly kills the bark of the tree and usually gets in via damage, such as bad pruning, something those trees look like they suffered several years ago.  Once it encircles a branch or the trunk, areas beyond die.
    I would take them out and replace them.
    A trowel in the hand is worth a thousand lost under a bush.
  • pansyfacepansyface Posts: 22,297
    Yup, they are bu§§ered.
    Apophthegm -  a big word for a small thought.
    If you live in Derbyshire, as I do.
  • Many thanks for the replies. I had cut through an affected branches but couldn't see any dark marks, so hoped it wasn't. Appreciate the replies. Many thanks :(
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