Looks Like apple scab. Do you spray with any fungicides.
Here is guide for spraying. Scab is a disease that is worse in wet springs. Sprays of the fungicide must go on before infection. Check out the spray schedule in the following publication.
You may want to call your local office for further help.
Purdue Extension - Boone County
Hours: Mon-Fri 8:00 AM - 4:00 PM
1300 East 100 South
Lebanon, IN 46052
Phone: (765) 482-0750
Fax: (765) 483-4453