For some time now my Acer has been dying back and appears to be infected - see the white spots on the trunk and the bark dieback. Is this something which can be treated - and if so how?

The photos I think summarise the issue well so I'm just looking to understand precisely what the condition is.

Acer dieback Acer trunk white spots

  • I see the white but does the tree also bleed sap? I can sort of see it but need confirmation
    – user33232
    Commented Jun 27, 2018 at 19:36
  • I don't think the white spots are the cause.
    – kevinskio
    Commented Jun 27, 2018 at 21:07

1 Answer 1


The white spots are Lichen and are harmless. Looks like an animal has been dining on the bark. My guess is rabbit.

  • I doubt it - in an urban (sealed) garden with no pet rabbits known nearby. Plus, the dieback extends to the top of the plant which a rabbit or similar would be unable to reach (this example is c. 1 m tall). Commented Jul 2, 2018 at 12:31

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service and acknowledge you have read our privacy policy.

Not the answer you're looking for? Browse other questions tagged or ask your own question.