Plum tree fungus/mould
Hi, I’m looking for some advice on an ailing plum tree, which has been losing leaves to what appears to be a type of fungus or mould. There’s no fungus at the base of the trunk - I initially wondered if it might be honey fungus - but there is this grey white growth in patches on many of the branches. Does anybody know what this is and if there’s a treatment I could try. The tree is 40 years old, so I’m keen to save it if I can. Thanks in advance for your help.