Acer tar spot

Question ...

Can diseased sycamore leaves be put into a compost bin? It looks like they are suffering from some sort of blackspot fungus? Can you advise what is the best way to deal with them?

Answer ...

The sycamore leaves are showing signs of a very common fungal disease known as Acer tar spot. There is no need to treat this and it is fine to compost the affected leaves. If you have a large quantity of leaves they are better left to rot down in their own leaf mould bin, container or black bin bags.

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