Iowa State University Extension - Wapello County Root maggots are tiny legless maggots that feed on the roots of cabbage and cauliflower and on the fleshy portions of turnips and radishes.
Adults are similar to house flies, but their legs appear to be longer.
There are several generations each year. Winter is spent in the pupal stage in the soil. Common Vegetable Insects, picture sheet no. 9, Iowa State University Extension, Ames, Iowa.