Keep poison baits away from feed, water and milk. Make light applications and collect dead flies and all bait periodically. Apply liquid baits to burlap bags, papers or other removable surfaces. After some time passes, organic phosphate insecticides used in liquid baits will decompose and only the sugar or syrup will be left to attract flies. Therefore, remove and replace liquid bait residues regularly.
Most dry baits are available as prepared products.
Pasture fly numbers can be reduced with the use of sprays, ear tags, dust bags and oilers. Most ear tags currently registered for use on beef cattle also can be used on dairy cattle. If face flies are on the cattle, two ear tags per animal may be required because face flies concentrate on the face. Best results are achieved when cattle are forced to pass through low-hanging dust bags and oilers so their faces get treated. None of these control methods are effective for controlling filth flies.