Slate-colored Corathon insecticide cattle ear tags with FyberTek can be used for both beef cattle and non-lactating dairy cattle to control horn flies, face flies, gulf coast ticks and spinose ear ticks for up to five months. Corathon controls pyrethroid-resistant and chlorinated hydrocarbon-resistant horn flies and controls face flies, the mechanical vector of Moraxella bovis, the bacteria that causes pinkeye in cattle. Corathon contains 50% organophosphate insecticide, 25% more active ingredient than the Co-Ral plus insecticide cattle ear tag. It is ideal in rotation with ear tags using pyrethroid chemistry and utilizes the Allflex universal total tagger.