Problems with fly control in the U.S. cost producers up to $800 million annually. Flies can spread disease and lower milk production or weight gains in cattle. The three most common fly species affecting herds include the horn fly, face fly, and the stable fly. Dave Boxler University of Nebraska –Lincoln Extension Educator says all three are important to control, but horn fly populations are already approaching the economic injury level for cattle herds.
Boxler says livestock producers can achieve the best results with an early fly control program.
Boxler says the horn fly has been known to spread mastitis among dairy herds but the stable fly doesn’t spread any reportable diseases.