Peach Leaf Curl: Leaves become deformed and misshaped. The infected leaves often turn yellow, then reddish, in color. Weeks later a whitish "bloom" occurs on the infected tissue. Leaves fall early – often by early July in Northern Illinois. Repeated early defoliation can weaken trees and predispose them to other problems.
Plum Pocket: Begins as small, whitish spots on young fruit soon after flowering. Eventually, these spots enlarge to affect the entire fruit, which become very large with a hollow core and a decayed outer appearance.
Grow resistant varieties. Promote tree vitality through pruning, fertilization, and watering. Make one fungicide application as a dormant spray to buds and twigs in the fall after leaf drop or in the spring before buds begin to swell. Applications of fungicides after bud-break are ineffective.