What is this fungus?
Hi, we have this cotton-wool like “fungus” on an apple tree. Can anyone enlighten me as to what it is, and how to treat it? Thanks for your help.
Certified GKH Gardening Expert
I can't say exactly without a close up inspection, but I think this is a Wooly Aphid infestation.
Began treating with Neem Oil.
Here are some articles that will help you.