Do you have to spray a bordeaux mixture to avoid leaf curl? I use to have several hundred stone fruit and avocado trees. It was great work, unfortunately family was involved in my equation.
Type in curly leaf at Google. You can find the sprays (copper, sulfur, fungicide, oil). You need to use them in the fall. But once you have it, you have it, and it probably won't go away. My family use to grow peaches, wine grapes, and almonds...In a simpler time.
. Nice set up!