We have a flowering cherry tree in a large teracotta container-not sure of the exact variety but it has a dark wine cooured leaf and I have noticed quite a lot of holes eaten into them.....What is the likely culprit ? (It has past it's flowering period)
Hi Matheous, If the holes are small round and all over the leaves that first seen as brown patches that fall away leaving the holes, then I think it could be 'shothole' aka elfshot which is caused by a fungus (Stigmina carpophila)
The best way to treat this is to increase the trees vigour by feeding mulching and watering, if no improvement is seen spray with ' Bordeaux mixture' in the summer.
Ps Larger hole mainly confined to the edges may indicate caterpillars. Hope this helps. Tbird+
If the holes just appear, without the brown patches that Thunderbird mentions, you may have vine weevils. these are very slow moving, dull coloured b@@s@rds that tend to lay their grubs in your most precious plants and then decimate them. you can get rid of them, to a certain extent with constant vigilance and squashing, plus watering in a nematode solution.