It’s a serious disease caused by fungus that attacks ornamental crabapples. It’s most severe during spring and early summer when the humidity is high and the temperature moderate. Apple scab can be observed on leaves, blossoms, fruit and young, succulent shoots. It looks like small velvety brown to olive=green spots that enlarge and darken to become more or less circular. When infections are numerous, young leaves become curled and distorted, and severely infected leaves and fruit fall prematurely. We can identify it and implement an effective treatment. Call 815-965-5757.