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Cluster Flies One of Frances Number 1 Pests

Cluster Flies One of Frances Number 1 Pests

For many people living in rural France, cluster flies are becoming an increasing problem. This is due to the nature of the flies and there life cycle. Adult cluster flies lay their eggs near earthworm burrows, and the larvae then infest the worms. So in places where earthworms are in large numbers this will undoubtedly attract a larger number cluster flies. The eggs take 10–12 months to fully develop into an adult, which these eggs being laid in the Autumn, so as summer  arrives the eggs have hatched and the larvae are developing into flies which results in large numbers becoming a nuisance in the summer months. It has been noted by many Brits who have holiday homes in France is that as they return to the house in the summer the flies are in mass outside and inside the house. As one noted on United In Normandy forum, "During the afternoon when the sun is out they appear to rest on the side of the barn, when the sun goes down they disappear only to end up in my attic, when they first appeared I went up there and sprayed everything in sight causing mass mayhem, every other day since then I have the same problem other than continuous spraying I don’t know what to do.."

This big mass of flies cause many issues, as they possess the ability to squeeze their bodies through any exterior crevices of a home, such as cracks around windows and doors, air conditioning vents, screening vents, and loosely hung siding. Then as it starts to get colder, they usually hibernate in inaccessible areas between walls and in ceilings until spring when they emerge and start the whole cycle again. Because of this the flies cause problems throughout all seasons, and typically large piles of dead flies will attract other pests which only adds to the growing pest problem. So make sure to stock up on sprays/smoke bombs and powders to apply to hibernation areas to stop the flies in their tracks!