Merck Ultra Boss

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5% permethrin and 5% piperonyl butoxide. A pour-on insecticide for beef, dairy, and lactating cattle. Low-volume dosage reduces time and labor. No preslaughter withdrawal. No milk discard. Target species: lice, horn flies, face flies, horse flies, stable flies, mosquitoes, black flies and ticks. Apply 3 ml per 100 lb. body weight, up to the 30 ml maximum application limit. Also approved for use in backrubbers.

Active Ingredients: Permethrin (5%) and Piperonyl Butoxide (5%)

Rate: 3 mL/100 lbs (max 30 mL/head)

Treats: 127 cows or 225 calves

Backrubber: 100 mL/ gallon of mineral oil

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