Evaluation of Ear Tag Devices for Face Fly and Horn Fly Control on Beef Cattle, 1983

Atroban permethrin 10% AI ear tags (2 tags/cow), Ectiban permethrin 0.9 g AI ear tag tapes (1 tape/cow), Ectrin fenvalerate 8% AI ear tags (2 tags/cow) and Permectrin permethrin 10% AI ear tags (2 tags/cow) were evaluated for horn fly and face fly control on 8, separately pastured, mixed-breed beef cattle herds. Treatment herd size ranged from 20 to 50 cows/herd. A separately pastured, untreated herd of 50 mixed-breed beef cows served as a control. Horn fly and face fly counts were made on 10 randomly selected cows in each herd at weekly posttreatment intervals. Horn flies were counted on 1 side and face flies on the entire face of each animal.