Order 2016 Almanac Now - Get 3 FREE Gifts
Sounds like you have anSounds like you have an infestation of a fruitworm. you can't do anything about it this year, but next year spray tree in the dormant season with a oil, and lime/sulfur (for Pseudomonas seringii if you have spotting on the leaves).

2015 Special Edition Garden GuideCooking Fresh with The Old Farmer's AlmanacThe Almanac Monthly Digital MagazineWhat the heck is a Garden Hod?