Apple Maggot injury varies in appearance and severity among apple cultivars. Oviposition punctures by the adult female may cause the fruit to become dimpled or distorted and in softer cultivars the tissue around the wounds may darken and decay. These punctures or stings appear as pinpricks on the fruit surface. Young larvae tunnel throughout the apple, leaving small, brownish, irregular, threadlike trails. As the larvae grow, the tunnels become more conspicuous and are further enlarged by bacterial decay. Eventually, the apple becomes soft and rotten. This internal breakdown proceeds more rapidly and is more severe in the softer-fleshed, earlier-maturing cultivars.