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Nebline Newsletter Article

Bugged by winter flies?
This article was submitted by Barb Ogg, PhD, Extension Educator, University of Nebraska Cooperative Extension in Lancaster County. The article appeared in the January 1996 NEBLINE Newsletter.

If your house has been invaded by flies on bright, sunny winter days, you are not alone. Your attic or upper floors near windows are the most common locations for these flies to congregate. They may look like house flies, but they probably are either cluster flies (the sluggish ones) or face flies (the not-so-sluggish ones).

In the fall, these outdoor flies hide in protected places and may find refuge in small cracks around window and door frames. When they "come alive" on sunny days, they seem to be invading the house. Neither of these flies can breed inside your home.

Best management practices include caulking cracks around windows and door frames to prevent entry in the first place. The vigorous use of a fly swatter is the best control for just a few flies. Insecticide "bombs" can be useful in killing large numbers of flies that are exposed and active especially in attic areas where exposure to family members and pets is not likely. Be sure to read and follow label directions when using any pesticide.

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