http://gardening.wsu.edu/library/tree002/tree002.htm
"After about 20-30 days in the fruit, the maggots drop to the ground where they bury themselves in the soil. There they change to the pupal stage and spend the rest of the winter. They emerge as adults from July through September. The adults must feed for a period of 7-10 days in order to reach sexual maturity. After this period, they are attracted to fruit, where they mate and the females lay eggs. There is one generation per year. The apple maggot fly is about l/4-3/8 inches long. It has a black abdomen. Females have four white bands on the abdomen. The smaller males have three bands. The wings are clear but are marked with black bands. The apple maggot is closely related to the walnut husk fly, cherry fruit fly, and other picture-wing flies, including the snowberry maggot, an extremely close "look-alike.' Because of their close resemblance to these insects, entomologists must dissect them to confirm their identity."
http://insects.ippc.orst.edu/pnw/insects?34RUST05.dat
"Other management strategies Regular inspection and removal of fruit from infested trees can greatly reduce apple maggot populations in backyards and commercial operations. At weekly intervals from early August to fruit harvest, pick up and destroy any fallen fruit, in order to prevent apple maggots from completing their larval development. With low fly populations, multiple, yellow rectangular sticky traps or red sticky spheres may be hung from each backyard tree, or from perimeter fruit trees to intercept and trap adult apple maggot flies. Traps need to be replaced, or the adhesive reapplied periodically (every 3 to 4 weeks), throughout the season from early August to September."
I pick up fallen fruit and put it in plastic barrels or bags. the larvae hatch but are prevented from reaching the ground and die in the bottom. the rotted apples stay there over winter and are added to the
compost the following spring.
if placed on some containment that prevented soil contact, the collected apples could be used to provide larva for chickens