But that's the joy of picking wild apples! Worms!
I worked for an apple farmer in my younger days. He sprayed his apples 7 times a season to get those pristine apples. My home apples were full of worms because there was no way I was going to spray 7 times.
The biggest apple pest (at least in our area) are codling moths. There are ways to deal with them but if these trees are wild, it may not be worth the expense.
https://extension.colostate.ed...