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Ultra Boss® Pour-On (Merck)

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As low as $36.74 - $132.29
Control against flies and lice on cattle and sheep.

Ultra Boss® Pour-On contains 5% Permethrin for control against flies and lice on cattle and sheep. Low-volume dosage reduces time and labor. There is no preslaughter withdrawal or milk discard. Also approved for use in backrubbers.


  • Active Ingredient: 5% Permethrin and 5% Piperonyl Butoxide
  • Dosage: Apply 3 mL per 100 lbs body weight, up to 30 mL maximium application limit
  • For Use On: Dairy Cattle (Lactating & Non-lactating), Beef Cattle, Calves, Sheep, Dairy Goats (Lactating & Non-lactating) and Horses
  • Controls: Lice, Horn Flies, Face Flies, Horse Flies, Stable Flies, Mosquitoes, Black Flies & Ticks
  • Available Sizes: 1 Quart Jug or 1 Gallon Jug
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