Most dairies have “hot spots” of fly breeding around calves, cattle feeding areas, feed storage areas and manure storage areas.

According to Mary Sowerby, University of Florida dairy extension agent, and Jerry Hogsette, research entomologist with the USDA’s Agricultural Research Service, sanitation is the No. 1 key to controlling flies. Here are some suggestions:

• Clean up leftover hay and manure after moving a round-bale feeder to a new location. Spread out the material so it can dry.

• Prevent spilled or old feed from accumulating in feed storage areas.

• Pay particular attention to any place where manure is allowed to stay moist and undisturbed, like corners in free-stall barns or just off concrete pads.

• Remove soiled bedding and spilled feed around calf pens at least weekly.

• Clean up spilled and leftover feed in feeding areas, paying special attention to hard-to-reach areas.