What is the disease affecting my apple trees
My apple trees are over 20 years old and have produced well over the years. Last year they became infected with a disease that is killing them. The disease shows up as small bumps and circles on the bark in a series of spirals that circle the tree trunk. This year the trees did not leaf out much or produce any fruit. I believe they are dying and I want to replace them but need to know how to protect new trees from the same fate.
Certified GKH Gardening Expert
This sounds very much like you are describing Galls.
This is a disease that is generally fatal to the trees.
I've listed some links with more information.