I have a young apple tree and it has fruit for the first time, but most of the apples have this in them. Any advice would be welcomed.
what part of the world are you in?– BambooAug 22, 2019 at 18:36
This looks like apple maggot to me. A very very normal and regular pest. The adult lays the eggs in the epidermis of the fruit bud or the new apples. they hatch and eat their way out of the apple. Cleaning up the apples on the ground, leaf debris would be the best management. There will always be a few apples that have Apple Maggot no matter what you do but leaving apples lying on the ground could easily cause all of your apples to have this.
Just have to eat around the maggots? Grins!!
1Or make applesauce. Aug 23, 2019 at 0:50
No kidding! Home made applesauce is a completely different food than commercially canned! YUMMM.– stormyAug 23, 2019 at 20:00
Here it is usual to put a grease band around the trunk to prevent insects and larvae crawling up to the fruit buds.