Dairy cattle-Face fly

Musca autumnalis

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.

Management-chemical control

Ear tags

  • beta-cyfluthrin/piperonyl butoxide ear tag (Cylence Ultra)-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)-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)-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)-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)-One tag per ear on all animals when flies first appear in spring. Remove before slaughter.
  • zeta-cypermethrin/piperonyl butoxide ear tag (PYthon MagnuM)-One tag per head of all mature and weaned animals when flies appear in spring. Remove tag at the end of fly season or before slaughter.

Pour-ons, sprays

  • 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.
  • ddvp concentrated 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 withdrawal.
  • permethrin spray (Atroban 11% EC) at 1 quart to 50 gal water. Spray 1 to 2 quarts per animal.. Treat once every 2 weeks as needed.
  • permethrin/piperonyl butoxide pour on (Ultra Boss) at 3 ml per 100 lb body weight. Maximum of 30 ml (1 fl oz) per animal. Treat once every 2 weeks as needed.
  • permethrin spray (Gardstar 40% EC) at 118 ml (4 fl oz) per 50 gal water (0.05% ai). 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 till wet but not to runoff.
  • tetrachlorvinphos/ddvp (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. Do not treat calves under 6 months of age. Do not treat more often than once a day.

Dusts, backrubbers

  • coumaphos (Co-Ral Fly & Tick Spray)-Mix 4 quarts in 13 gal of no. 2 diesel or fuel oil. Place backrubber where animals congregate.
  • 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.
  • tetrachlorvinphos (Rabon 3%)-Direct applications of 2 oz per animal by shaker can, rotary duster or by spoon to the upper portions of the back, neck and poll and to the face as an aid in the control of face flies. Rub in lightly to carry the dust beneath the hair. Do not apply more than 1 time per day.
  • zeta-cypermethrin/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

  • diflubenzuron feed supplement (Clarifly 0.04%)-Prevents development of immature forms in manure of treated animals. Mix into grain according to label to provide 0.1 mg ai/kg (4.55 mg/100 lb) body weight per day. Start feeding early in spring before flies appear and discontinue when cold weather limits fly activity.
  • diflubenzuron add-pack for milk (Clarifly elim-A-fly Add-Pack 0.16%)-Prevents development of immature forms in manure of treated calves. Mix daily into milk/milk replacer according to label to provide 0.1 mg ai/kg (4.55 mg/100 lb) body weight per day. Start feeding early in spring before flies appear and discontinue when cold weather limits fly activity.
  • tetrachlorvinphos mineral block (Sweetlix Rabon)-For control of fecal flies in manure of treated animals. Feed free choice, 1 block for 5 head of cattle.