I have cut out some of the fungus and sprayed it with white vinegar and it has helped some. Is it ok to spray the whole tree with vinegar or is it too acidic and will it harm the tree?
My Peach Tree Has Fungus Growing Out of the Trunk
Certified GKH Gardening Expert
Without know exactly the type of fungus you are dealing with I would recommend using Neem OIl.
Neem Oil works as both an insecticide and fungicide. It is safe for people, pets and beneficial bugs.
Here are some links for you.