Hello, I have a small group of apple trees that I planted about six years ago that are now starting to produce very nicely. I believe the varieties are Kinderkrisp and Sweet Sixteen. For the last several years the Kinderkrisp have grown beautiful apples but by the end of August they have small holes in them and are often misshapen in a way that looks like it's caused by the holes. The apples are great tasting, but we have to eat around the spots / holes in them. Can you help me figure out what's causing these holes and spots, and tell me how to prevent them next year? My wife and I would like to try and keep sprays and treatments as natural as possible, but if a stronger spray or treatment is required to eliminate what's causing the holes we are open to that too. Please see pictures I've attached. Thank you for the help!