In addition to being annoying to cattle, face flies mechanically vector Moraxella bovis, the principal causal agent of bovine pinkeye or infectious bovine keratoconjunctivitis. Face flies belong to the same genus, Musca, as the housefly. Horn flies and face flies are the primary pests of cattle here in Burke County. Fortunately, we have a wide variety of fly control options. An online poll of webinar attendees showed 83% reported problems with face flies on their farm or with their cattle. The manure cannot be disturbed or they won’t reproduce. The face fly is similar to the closely related housefly but is slightly larger, ... On cattle and horses, they feed on secretions around the eyes, mouth and nostrils. The adult female face flies cluster around an animal’s eyes, mouth and muzzle, causing extreme irritation. Beef cattle producers are strongly encouraged to assess their beef cattle herd for fly pressure and to do a good job of controlling these pests. The life cycle takes about 2 weeks. Horn fly control can mean an additional 12 to 20 pounds of weight per calf over the summer months and can result in less weight loss per nursing cow as well. This is a plus. Unlike the house fly, face flies are pests of cattle in pastures during the warm months. Proper management of these fly populations reduces the number of potential vectors and the incidence of pinkeye may be minimized. With an ongoing fly management program, however, both you and your cattle … Face flies are found on range cattle throughout southern Canada and most of the USA. Biology Face flies feed on the secretions of the eyes and nose for short periods of time; only a small percentage of the local face fly population may be found on animals at any one time. Face flies spend relatively little time on their host. Instead, they have sucking mouthparts that they use to feed on ocular and nasal secretions. They take some 24 to 38 blood meals per day. Warble or gad flies (Hypoderma bovis and Hypoderma lineatum), once a huge economic concern to the cattle industry, were practically eliminated with the advent of systemic avermectins and pour-on organophosphates. For this reason, face flies primarily attack the head, including the eyes , nose, and mouth. The face flies use their abrasive spongy … The mouthparts consist of sponging labellae, and there are four longitudinal stripes on the abdomen. Face flies resemble house flies and feed on bodily secretions, usually around the eyes and mouth of cows. Overwintering face flies have habits similar to cluster flies … They require fresh manure to lay eggs. The adult female flies tend to feed on secretions from the eyes, nostrils, and mouths of pastured cattle, causing extreme annoyance and allowing for the transmission of pinkeye and other eye diseases. “This fly will cause cattle to stomp, stand in water, and bunch due to flies feeding on their legs. Unlike many other flies that affect cattle, face flies do not have biting mouthparts. A larger proportion of face flies on the host will be females, as they have a higher need for protein provided by animal hosts. Measuring about 10 feet in length, the walk-through fly trap is constructed with a solid top and partially solid sides to create a dim interior. As well as disturbance to feeding (especially to horses), face flies can transmit the eyeworm Thelazia rhodesi to cattle and horses, and the bacterium Moraxella bovis , which causes infectious bovine keratoconjunctivitis ('pink eye') in cattle. Traditionally, face fly population densities on NC cattle are highest in the spring, but may be significantly reduced in number under dry conditions. Face flies. Face fly maggots develop in freshly deposited cattle manure. And is sometimes difficult to differentiate is real on cattle operations belong to the same,. 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