Heterotylenchus autumnalis, a Parasite of the Face Fly123

Abstract

Heterotyplenchus autumnalis Nickle, a parasite of the face fly, Musca autumnalis Dc Geer, was found in face flies in Nebraska late in 1965. Surveys in 1966 showed that the parasite was present when the flies first appeared in the field in June. The nematode was active through-out the season and was present in flies entering hibernation in the fall of 1966. About 30% of face flies produced on 2 farms during the season were infected. H. autumnalis was not found in at least 10 other species of flies collected from cattle manure.