iO Tick Off contains the powerful insect growth regulator (IGR), fluazuron 25g/L, which interferes with chitin synthesis of the larval stages of the cattle tick. Controls susceptible strains of cattle tick (Boophilus microplus) & Inhibits tick development within three days. iO Tick Off is a ready-to-use pour-on formulation. iO Tick Off breaks the tick life cycle. When treated with iO Tick Off, immature ticks are unable to molt to the next stage of their life cycle, and no larvae will hatch from eggs laid by treated females. Active Constituent: 25g/L Fluazuron For strategic control of Cattle Tick, Boophilu microplus, (including all known acaricide resistant strains) on Beef Cattle. Apply iO Tick Off in two bands, roughly 7cm wide, one on each side of the spine between the rump and the shoulders. Only 3 maximum treatments per tick season annually. Make sure you re-treat when you first see ticks but not before at least six weeks after the previous treatment.