Champion USA JustiFLY Feedthrough Cattle Fly Control Block | Non-Toxic Larvicide. Controls All Four Fly Species That Affect Cattle

A highly effective insecticide containing the proven insect growth regulator (IGR) active ingredient diflubenzuron. JustiFLY® Feedthrough is EPA-approved for use in all pasture and confinement cattle and calves (including veal calves) for the control of horn flies, face flies, house flies and stable flies. 

Cattle simply ingest the larvicide as they feed on the salt. It passes through the animal and starts to work on flies in the cattle manure.

• SAFE for the Dung Beetle 
• ZERO animal handling stress

USE 1 BLOCK PER 21 HEAD FOR 30 DAYS