One insecticide-impregnated ear tag per animal resulted in satisfactory horn fly reductions of over 85% for 46, 62 and 71 days. Failure to control horn flies (50 or more flies per side) occurred at about 70 days post-treatment with three study herds in western South Dakota in the summer of 1980.
Number of Pages
South Dakota State University
Kohler, Paul H., "Rabon-Impregnated Ear Tags for Horn Fly Control on Beef Cattle" (1980). South Dakota Cow-Calf Field Day Proceedings, 1980. 1.