Abstract
Abstract Ten percent 50g Dimilin boluses were compared to 0.463% Rabon Sweetlix mineral blocks and 7.5% Guardian ear tags for face fly and horn fly control on cattle. Five mixed-breed beef cow-calf herds and 1 herd of mixed-breed heifers were assigned to treatments as indicated in the table below. Ear tag treatments were done on 13 and 21 Jun at the rate of 2 tags/hd, and bolus treatments were administered on 21 Jun at the rate of 1 bolus/50kg of body weight/cow; calves received 0.5 bolus each. The Rabon Sweetlix mineral blocks were placed on 2 covered mineral feeders at the rate of 1 block/5 cows on 5 Jul. New Rabon blocks were added when 0.67 of the original amount was consumed. Horn fly numbers were estimated on 1 side of each of 10 cows and the total face flies found on the faces of these same cows were recorded. The mean number of flies was used for determining fly reduction.
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