What Is It?
Apple maggot (Rhagoletis pomonella) is a pest fly native to North America, and has been a serious pest of apples in Canada for over 100 years.
What's the Problem?
The apple maggot larva burrows in all directions through the flesh of ripening apples feeding on the pulp and leaving brown channels. Pitting, dimpling and black spots on the fruit can mark the puncture sites where female flies have laid eggs in the fruit.
The apple maggot mainly attacks apple and hawthorn. They will also sometimes attack sweet cherry, sour cherry, plum, peach, pear and cotoneaster.