Beckman offers different methods of managing Horn Flies

The horn fly is one of the most damaging external parasites of cattle in Nebraska, causing reduced weight gain and milk production once numbers exceed 200 flies per animal. In northeast Nebraska, fly emergence typically begins in late May and continues into fall. Now is the time to evaluate your fly control management for the upcoming grazing season. Was control adequate in 2024? If not, consider changing products or methods. Extension Entomologist Dave Boxler outlines several control options: • Pour-ons Applied along the back, these insecticides provide control for several weeks but require reapplication throughout the fly season.