The major diseases transmitted by flies to humans and domestic animals are enteric diseases and eye infections like Pinkeye. Pinkeye is painful and spreads rapidly among your herd. There are several best management practices that most every producer should follow.
- For calves and cows (dairy cows under 21-months of age), apply two insecticide fly tags (one in each ear) per animal, in addition to a low-volume, long-lasting pour-on for rapid knockdown of the existing fly population. Reapply the pour-on as needed
- For premise control, use an insecticide such as a microencapsulated product that delivers superior, long-lasting control on a wide variety of surfaces in and around livestock facilities
- Use additional fly-control measures as necessary, such as back-rubbers, oilers and other devices that can be used on pasture. Reapply insecticides throughout the fly season, and always follow label directions.
Management practices such as pasture mowing, dust control and man-made or natural shades are important to minimize eye irritants, such as pollen, seed heads, dust and ultraviolet light.
These environmental factors cause eye irritation and physical damage, allowing infectious pinkeye organisms to attach to the surface of the eye. These irritants can also cause the eye to tear. Tearing, watery eyes can attract flies, which feed on the watery secretions from the eye and surrounding tissue and spread pinkeye-causing bacteria.
In the Hen House
Water management and sanitation is the most effective way to control flies around the hen house. Fresh poultry manure contains 75 to 80 percent moisture, which makes it ideal for fly breeding. Fly breeding can be practically eliminated in this material by reducing the moisture content to 30 percent or less or by adding moisture to liquefy it. Drying manure is preferred because the product occupies less space and usually has less odor.
Sanitation is very important for maintaining fly control. Quickly remove broken eggs. Clean up and dispose of feed and manure spills, especially if wet. Frequent removal of manure (at least once a week) prevents fly buildup by breaking the breeding life cycle.
Sticky fly ribbons should be placed at every entry. A fan can be used to inhibit fly entry through doorways because flies to not move against the wind.
Sources: http://www.stopcattlepinkeye.com/3-pronged-approach-to-m-bovis-prevention.asp and http://www.ah.novartis.com/bioprotection/flycontrol/economicimpact/index.shtml