For more Information call toll free 1-877-751-8200 or E-mail us at AN_AnimalHealthTeam@adm.com

Production Losses Associated with Flies
Flies annoy and irritate animals, transmit disease, reduce weight gains, and reduce milk production.

Horn flies can cause significant economic losses. They are biting, blood-sucking flies that feed 20 to 40 times per day, reducing milk production up to 20% and decreasing gains in growing cattle by 0.25 to 0.5 lb per head daily (USDA) if not controlled. Five hundred horn flies per animal will consume about 1 gallon of blood in a 30-day period.
Click here to learn about our IGR (Insect Growth Regulator) Concentrate to stop horn flies

Stable flies can do as much if not more damage than horn flies. Stable flies feed with a piercing-sucking mouth. According to the University of Illinois, as few as 40 flies per animal can cause significant reduction in milk production. The USDA estimates milk production losses at up to 20% without good control.

Economic losses may occur when the fly population reaches 100 flies per animal. Over 200 flies per animal can cause significant economic losses. A good fly control program using an oral larvacide, backrubber at peak season, and time-released insecticide provides a favorable cost:benefit ratio.

Fly Control Management Recommendations

• Practice good sanitation management.

• Keep fly populations under control. Elimination is not the goal. Treat fly levels over 100 flies per animal. Keep the population below 200 flies per animal.

• Use periodic treatments, rotating insecticide methods (sprays, dust, backrubbers).

• Use an oral larvicide with periodic treatments for cattle on pasture.

• To reduce over-winter fly phase, treat late in the fly season.

• If using insecticide tags as part of the pest control program, follow usage recommendations throughout the season.

• Use a pyrethrin for quick kill and reduction of all fly populations.

Resistance Issues

• Insecticide ear tags were introduced in the early 1980s. Originally, they were very effective; however, favorable results lasted only a few years. Due to management practices and other factors, resistance to the insecticides used in ear tags quickly developed.

• Resistance to man-made pesticide compounds (pyrethroids, organophosphates, etc.) can occur in a specific fly population.

• Resistance can be widespread, but not uniform.

• The flies’ resistance mechanisms are different for different compounds.

• Insecticide resistance is often perceived rather than actual due to inadequate application, poor timing, inadequate total control program, and/or sudden resurgence of flies if conditions are ideal.

Product	Description	Application
8512 Fly Spray (2 x 2.5 gal)	An oil-based pyrethrin livestock spray with rapid knockdown and high killing powers. Quantity/size: 2 x 2.5 gal	Apply to livestock as a mist spray only. Only efficient hand-type spray guns or insecticide foggers should be used. For use on dairy cows, in dairy barns, and on beef cattle and horses for control of face flies, horn flies, stable flies, houseflies, horse flies, mosquitoes, and gnats.

8532 Dairy Aerosol Plus	The best formulated dairy aerosol on the market. It contains 0.5% pyrethrins, 5% piperonyl butoxide (10:1 effective kill ratio), 152-A propellant (provides ideal particle size, breakup, and complete can discharge). Quantity/size: 6 x 26 oz	Spray 1-2 seconds per 1,000 cu ft. Can also be sprayed on cattle. This formulation, along with the very best ingredients (pyrethrins, superior synergist, and ideal propellant), makes this a very cost-effective, safe, and convenient product.
8528 Pet, Premise, & Horse Spray	Pet, Premise and Horse Spray is an aqueous insecticide spray containing synthetic pyrethroid SBP-1382, which is an effective insecticide of low toxicity. Quantity 12-16oz cans	This product has a fogger nozzle, which will make it an ideal product for control of house and garden insects. Pet, Premise and Horse Spray has a quick knockdown and residual kill of crawling insects for up to four weeks.
8535 Rabon 7.76% Premix	R.O.L. Premix is designed to prevent the development of horn flies, face flies, house flies and stable flies in the manure of treated cattle, house flies in the manure of treated swine, and house flies and stable flies in the manure of treated horses. Available in a 50 pound bag.	Rations containing R.O.L. Premix may be fed up to slaughter and to lactating dairy cows without withholding the milk from market during or after treatment. Start feeding Rabon® larvicidal feeds early in the spring before flies begin to appear and continue feeding throughout the summer and into the fall until cold weather restricts fly activity. R.O.L. Premix is available in a 50 pound bag.
8539 IGR Concentrate	IGR Concentrate is a feed concentrate containing an active pesticide for cattle. It contains methoprene, an insect growth regulator (IGR), which inhibits the growth and subsequent breeding of horn flies in beef and dairy cattle. When fed continuously, it prevents the emergence of adult horn flies from the manure of treated beef and dairy cattle. Available in a 25 pound bag.	Begin use in the spring before horn flies appear on cattle, and continue feeding until cold weather restricts horn fly activity. Introduction of this product when significant numbers of adult flies are present requires the use of insecticide sprays or dusts for adult insects. The recommended consumption of this product is 0.2 oz - 0.4 oz (0.0125 lb – 0.025 lb) per 100 lb of body weight per month (30 days).