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Question: The shoots/twigs/branches of my apple tree are covered with a grey-coloured crusty growth. Check for the characteristic wood staining within the affected branch.

If branch dieback is preceded by the leaves taking on a silver colouration, then the most likely cause is silver leaf disease.

Dieback due to fireblight often spreads further down the shoot than blossom wilt – it can work its way back into the main branches Shoot dieback at this time can also be caused by the bacterial disease fireblight, but this is much less common. Dieback due to blossom wilt rarely progresses back more than 15-30cm (6in-1ft).

Dieback of numerous shoots in late spring, with the leaves shrivelling and turning brown after flowering, is usually the result of the fungal disease blossom wilt.

The fungus often attacks trees already weakened or dying back due to other problems

If the dead branches have numerous pinhead-sized, raised, coral-pink pustules on the surface then coral spot is involved.

This disease can affect twigs, branches and even the main trunk If the dieback is accompanied by areas of sunken, dead bark then the likely cause is apple canker. What could be wrong?īranch dieback can be another symptom of the root problems described above, as the tree struggles to take up water through its poorly-functioning root system Question: The shoots/twigs/branches of my apple tree are dying back.

RHS Garden Rosemoor Flower Show - Dates TBC.RHS Botanical Art and Photography Show - TBC July 2024.RHS Flower Show Tatton Park - 17-21 July 2024.RHS Hampton Court Palace Garden Festival - 2–7 July 2024.

RHS Garden Wisley Flower Show - 5–10 September 2023.