Answer: Apples can become affected by apple maggots, which tunnel throughout the flesh of the apple. These worms are the larvae of a sawfly, which is pretty hard to hit with an insecticide because they are so mobile. A good way of dealing with these pests is to hang sticky traps in your trees. You can put your trees on a spray program, but there's no guarantee you'll stop the damage because the applications need very specific timing; insects are active when temperatures suit them. For a complete spray schedule, contact your local Cooperative Extension office. Their publications will recommend products licensed for you local area. Best wishes with your apple trees!
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