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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

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  • 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

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

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  • 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).
    – Andrew Abbott
    Commented Jul 2, 2018 at 12:31

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