We planted a new peach tree last year. We are in northern IL. Can anyone tell me what’s wrong?
Welcome @Vsma! I have a section of a reliance peach which looks similar. In my case it’s a borer issue. I was able to remove damaged wood down to healthy wood. I painted some doc Farwell on it because it seemed so exposed to further damage. Fortunately the large branch was not girdled.
the hole on the leaves looks like "shot hole " disease you can use copper fungicide to prevent it.