Efficacy of Saber Ear Tags on Horn Flies and on Calf Weaning Weights, Gudmundsen Sandhills Laboratory, Whitman, Nebraska, 1990

Crossbred cow/calf pairs, maintained on University of Nebraska-Lincoln Sandhills native range pastures were selected for use in this study. Saber (10% Lambdacyhalothrin) ear tags were applied to 30 cow/calf pairs (2 tags/cow). A second group of 30 cow/calf pairs were left untreated and served as a control. All calves were weighed 4 Jun, the same day the cows were tagged, and the cow/calf pairs were placed in appropriate pastures. The pastures were of equal size (623 acres) and had a good stand of native grass. Horn fly poulations were recorded weekly by counting the total number of flies on both sides of a cow. A minimum of 15 cows was included during each fly counting session.