I suspect my Golden Delicious apple tree has apple rust or something similar, but it produced a LOT of apples. The apples "look" fine but I am not sure if they are safe to eat. The leaves are covered in yellow spots and the underside of the leaves have hair-like spores. I want to make sure the apples are edible even if the tree has a fungus. My children really want to eat them! :) Additionally, how do I treat the tree so that the fungus does not return next year? Is there anything I can do for it?
Apples From a Tree With Fungus
Certified GKH Gardening Expert
The symptoms you describe are from cedar apple rust. Here is an article with information on cedar apple rust that will help you:
My research indicates that while cedar apple rust may reduce a crop, the apples are still considered edible.