Re: New Sorbus whitebeam leaves turned brown & spotty
Shoot User
Hi Jenny,
Do you have any photos you can upload? Is the other tree affected at all? From what you say, initial thoughts are that it sounds like it may be some sort of fungal diesease, possibly leaf scab, a disease which is usually associated with apples but has also been known to affect sorbus.
If this is the case try removing all affected leaves and burn, trying to handle as carefully as possible so as to minimise the spreading of spores. If this would result in removing too much of the tree you could alternatively try spraying it with a fungicide.
For an expert diagnosis you could try sending a sample to the RHS pest and disease identification service (for members).
Hope this helps, and that your specimen recovers.
Katy
Replied: Tuesday 6th of July 2010 01:15 PM