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. These aspects of its life history make management of face fly a very difficult task. Hence, many of the products labeled for efficacious horn fly control indicate that they merely aid in face fly control.
- beta-cyfluthrin ear tag (Cylence Ultra)-Apply one tag to each ear of all animals older than 3 months when flies appear. Remove tags at end of fly season or before slaughter.
- diazinon/coumaphos ear tag (Corathon)-Apply one tag to each ear on all mature animals when flies appear. One ear tag per calf. Remove tags at end of fly season or before slaughter. Do not use on lactating dairy cattle.
- lambda-cyhalothrin/piperonyl butoxide ear tag (Saber Extra)-Apply one tag to each ear on all animals when flies appear in spring. Remove tags in fall or before slaughter. Do not use on lactating dairy cattle.
- lambda-cyhalothrin/pirimiphos-methyl ear tag (Double Barrel VP)-Apply one tag to each ear on all animals in herd when flies appear in spring. Do not use on lactating dairy cattle. Remove tag in fall.
- permethrin ear tag (GardStar Plus)-Apply one tag per ear on all animals when flies first appear in spring. Remove before slaughter.
- zetacypermethrin/piperonyl butoxide ear tag (PYthon MagnuM)-Apply one tag per head of all animals at least 3 months old when flies appear in spring. Remove tag at the end of fly season or before slaughter.
- zetacypermethrin/abamectin ear tag (Tri-Zap)-Apply one tag per ear of all animals. Remove at end of season or before slaughter.
- coumaphos (Co-Ral Fly & Tick Spray)-Mix 1 qt per 50 gal water. Spray to complete wetting to run-off. Treat no more than 6 times/year. Do not apply less than 10 days apart.
- cyfluthrin pour-on (CyLence)-See label for dosing instructions. Pour along top of back and head of cattle of all ages. Repeat as needed but no more than once every 3 weeks.
- dichlorvos spray (Vapona)-Dilute 1 gal in 50 gal water (1% solution) and apply up to 2 fl oz of solution per animal (per day) as a fine mist spray. Do not wet hide. Do not treat calves under 6 months of age. One day meat withdrawal.
- dichlorvos spray (Prozap Beef & Dairy RTU)-Apply 1 to 2 oz per adult animal as a mist to wet hair. Use proportionately lower rates for smaller animals. Do not exceed 2 oz per animal per day. Do not soak skin or wet hide.
- dichlorvos/piperonyl butoxide/pyrethrins (Prozap VIP Insect Spray)-Apply 1-2 oz to each animal, proportional to size. Do not soak the skin or wet the hide. Do not apply more than once per day. Do not apply to animals less than 6 months of age.
- permethrin spray (Atroban 11% EC)-Dilute at 1 quart to 50 gal water. Spray 1 to 2 quarts per animal.. Treat once every 2 weeks as needed.
- permethrin pour-on (Boss) -Apply at 3 ml per 100 lb body weight. Maximum of 30 ml (1 fl oz) per animal. Retreat as needed but no more than once every 2 weeks.
- permethrin pour-on (Martin's 1%)-Pour along back line and down face at 0.5 ounce per 100 lb body weight up to a maximum of 5 ounces. Repeat as needed but don't exceed 5 oz during any 14 day interval.
- permethrin spray (Gardstar 40% EC)-Dilute at 118 ml (4 fl oz) per 25 gal water (0.05% ai). Apply 1 to 2 quarts high pressure spray over body of animal. For low-pressure spray, apply at 118 ml (4 fl oz) to 2.5 gal water, spray to point of runoff.
- permethrin spray (Durvet 10%; Prozap Insectrin X Concentrate)-Dilute 0.64 oz (normal infestation) or 1.28 oz (severe infestation) per gallon water (0.05%, 0.10%). Spray to thoroughly cover entire animal. Spray lactating cows only after milking is completed.
- permethrin spray (Prozap Screw Worm Ear Tick Aerosol; Durvet Screw Worm Aerosol)-Spray about 3 seconds on each side. Repeat treatment with flies are troublesome.
- permethrin/piperonyl butoxide pour-on (Ultra Boss) -Apply at 3 ml per 100 lb body weight. Maximum of 30 ml (1 fl oz) per animal. Retreat as needed but no more than once every 2 weeks.
- pyrethrins spray (PyGanic Livestock & Poultry Insecticide)-Dilute at 9 oz per gal water. Apply using large-droplet spray to face of animal in morning. Do not exceed 1.5 oz of diluted solution per animal or 1 treatment per day. This organic product is OMRI listed.
- pyrethrins spray (Evergreen Pyrethrum Concentrate)-Dilute at 2.5 oz per gal water and apply using large-droplet spray to face of animal in morning. Apply enough to wet the face but not more than 1.5 oz per animal. Repeat daily as needed. This organic product is OMRI listed.
- pyrethrins/piperonyl butoxide/N-octyl bicycloheptene dicarboximide spray (SSI-50)-Spray animal as it's being released to pasture. Spot treat withers, shoulders, and back where saliva accumulates.
- pyrethrins/piperonyl butoxide spray (Vampyre Misting Concentrate)-Dilute at 4.3 fl oz per gal water (for 0.10% pyrethrins) or 22 fl oz per gal water (for 0.50% pyrethrins). Spray face or spray cloth and run on face, avoiding eyes. Repeat as necessary.
- tetrachlorvinphos/ddvp spray (Ravap EC)-Mix 1 gal in 200 gal water. Apply as coarse spray, up to 0.5 gal per animal. Avoid contacting teats with spray unless teats are washed and dried before milking. Apply at least 20 minutes before milking or after milking is complete. Do not treat calves under 6 months of age. Do not treat more often than once a day.
- coumaphos (Co-Ral Fly & Tick Spray)-Mix 4 quarts in 13 gal of no. 2 diesel or fuel oil. Place backrubber where animals congregate or travel regularly. Resaturate backrubber as needed.
- permethrin (Durvet 10%; Prozap Insectrin X Concentrate; Martin's Stock-Tox X)-Dilute 8 oz in 5 gal oil (0.125%). Keep backrubber charged.
- permethrin (Gordon's)-Use undiluted. Recharge as needed.
- permethrin dust (several brands, 0.25%)-Suspend bags where cattle congregate or pass through. Place bags so they hang 4 to 6 inches below animals' backline. Direct applications of 2 oz per animal may be repeated as needed but no more than once every 3 days.
- zetacypermethrin/piperonyl butoxide dust (PYthon)-Apply in dust bag, shaker, dusting glove, or mechanical duster. Suspend bags where cattle congregate or pass through. Place bags so they hang 4 to 6 inches below animals' backline. Direct applications of 2 oz per animal may be repeated as needed but not more often than once every 3 days.
Feed supplements (prevent development of flies in the manure of treated cattle)
- diflubenzuron feed supplement (ClariFly 0.04%; ClariFly 0.67%; ClariFly 8%; JustiFly 0.67%; JustiFly 8%)- Mix into grain according to label to provide 0.1 mg ai/kg (4.55 mg/100 lb) body weight per day (follow table on label). Start feeding early in spring before flies appear and discontinue when cold weather limits fly activity.
- diflubenzuron for milk (elim-A-fly Add-Pack with ClariFly 0.16%; JustiFly 0.16% Milk Replacer Product)-Mix daily into milk/milk replacer according to label to provide 0.1 mg ai/kg (0.1 oz elim-A-fly /100 lb) body weight per day. Start feeding early in spring before flies appear and discontinue when cold weather limits fly activity.
- diflubenzuron mineral tub (Vitalix ClariFly Tub)-Provide free choice with targeted consumption of 1.6 ounces per 100 lb of cow per day (~one tub per 15-25 head). Provide before flies appear until end of fly season.
- tetrachlorvinphos mineral block (Prairie Pride Rabon)- Feed free choice, 1 block for 10-15 head of cattle.
- tetrachlorvinphos feed supplement (Rabon 97.3; Rabon 7.76)-Include in diet or supplement at 70 mg per 100 lb body weight daily. See Mixing and Use Instructions for additional details.