Muscidifurax zaraptor, Spanglia
This minute fly deposits eggs in the pupae of the pest fly and the larvae consume them from the inside. Although developed for dairy and farm use, our cutomers report effective control of house flies in log cabins. Pest flies reproduce faster and files come in from elsewhere so we recommend releasing fly parasites in small amounts throughout the season. The suggested number of parasites per animal are: Large animal, 500; Medium animal, 250; Small animal (birds, rabbits), 5, manure/compost piles, 5 per cubic foot.