Scab

This appears as an overgrowth, sunken area, or spot on fruit (apple, pear, peach, citrus, pecan); vegetables (potato, beet, peas, cucurbits); and leaves of many plants.

Follow recommended program of spraying for fruits.  For other plants, treat same as for leaf spots and blights.  Control weeds and insects in and around the garden.  Destroy plant refuse, and rotate non-wood plants at three-year intervals.