Rosa rugosa
The original ancestral host of the apple maggot was the wild hawthorn ("Crataegus" spp.), but in the mid-1800s when the apple ("Malus" spp.) was introduced to North America, "R. pomonella", able to take advantage of the new host, evolved. Peach, pear, cherry, plum, chokeberry, cranberry, dogwood, and fruits of the Japanese roses "Rosa rugosa and Rosa carolina" can also host apple maggots. However, apple maggots are not usually a serious pest of plums, cherries, and pears; larvae have been found in pears but not adult flies.