It is of the utmost importance to be able to identify the pest as early as possible, so that management strategies are more likely to succeed. Fruit from backyard trees should not be moved offsite. Please, do not give away fruit from your orchard. Early stages of apple maggot damage are difficult to detect, as apples appear normal. They may be transported and discarded in apple growing areas where they will threaten commercial production.
Apples are fit for consumption after discarding the damaged parts.
As early as mid-June. From late June through early July, female apple maggot adults deposit eggs singly under the apple skin. Small, brown decayed areas indicate sites where apple maggot laid their eggs. Apple maggot larva burrow in the flesh and cause decay. Cutting the apples in half will tell you if the apples are rotten or not.