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CyLence pour-on is a cattle insecticide used on both beef and dairy cattle of any age for control of biting and sucking lice, as well as face and horn flies. The cyfluthrin pour-on treatment for flies can be repeated as needed, but not more than every three weeks. For optimal lice control, a second treatment three weeks after initial application is recommended.
1% Cyfluthrin. 1 pint of CyLence pour-on treats 40 head of cattle for flies or 20 for lice.
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