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Merck Ultra Boss Pour-On Insecticide

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Product Details

ULTRA BOSS® Pour On insecticide is used for beef, dairy and lactating cattle; sheep, goats and horses. Target species include: lice, horn flies, face flies, horse flies, stable flies, mosquitos, black flies and ticks.

  • Low-volume dosage reduces time and labor
  • Effective horn fly control for 8 weeks. Also controls face flies
  • Season-long lice control with one application (January through April)
  • Apply 3 mL per 100 lb. body weight, up to 30 mL maximum application limit.
  • Also approved for use in backrubbers

    IMPORTANT SAFETY INFORMATION: For cattle, horses, sheep and goats, repeat treatment as needed but not more than once every two weeks. For horses, do not saddle horse for 6 hours after application and refrain from washing down area of application. For optimum lice control, two treatments at 14-day intervals are recommended. ULTRA BOSS® Pour-On Insecticide is not effective against cattle grubs.

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