Walk-Through Trap to Control Horn Flies on Cattle
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The horn fly, Haematobia irritans (Linnaeus), was introduced into the United States more than a century ago. Since then, it has become one of the most important fly pests of pasture and range cattle. Field studies conducted in central Missouri during 1986 indicated the trap produced roughly 50 percent control of horn flies when averaged over the season. This level of control was less than that afforded by insecticidal ear tags and some other treatments but maintained horn flies below the injury level of about 200 flies per animal.
Archive version. For the most recent information see extension.missouri.edu.