What is on this apple tree?
Can anyone help please? I work in a garden where there is a large old and tall crab apple tree that has lots of white wolly bits all over it. I think this is woolly aphid and wonder how I can get rid of it organically or will I have to use chemicals? I am in a hosepipe ban area so cannot hose it off. Are there any nematodes that will clear it? See picture below.
Many thanks for your help.