Is this scab or rust?
I have 2 apple trees and a pear tree that are covered with yellow spots. The edges of the apple leaves have turned brown and are curling. These trees are only a couple of years old and every single leaf is affected. I've googled this several times, but can't come to a definite answer as to what this is. We've had a wet spring/early summer and it's been fairly cool till this week. Can you help me identify the problem? Thanks in advance.