1. Pick a chemical. Certain chemicals are just about as effective as others. To prevent insect resistance, it’s a good idea to rotate different chemicals when you treat the area. Possibilities include:

  • Pyrethroids (cypermethrin, fenvalerate, permethrin, resmethrin, tetramethrin, s-bioallethrin, sumithrin);
  • Organophosphates (coumaphos, dichlorvos, malathion, tetrachlorvinphos)
  • Organochlorines (lindane, methoxychlor)


2. Treat your livestock directly. Always double-check that the chemical you’re using is safe to apply directly to livestock. Then:

  • Use a small mist blower or a handheld mist sprayer to mist the chemical over your animals.
  • If your animals are spooked by the sprayer, then dip a sponge or a mitt in the chemicals and rub the sponge or mitt on your animals.
  • Always wear rubber gloves. Never let these chemicals come into contact with your skin.


3. Apply insecticides to areas around your property. Spray a resting areas or barns around the eaves, walls, ceiling and and rafters.

  • Always remove your livestock from the barn before you spray. Some of your animals may have to stay outside for a while. Just follow the directions on the packaging.
  • Coarsely spray resting areas with insecticides. Make sure to spray under low pressure.
  • Be careful not to contaminate your animals’ water and feed buckets. Also, keep the spray off of your farm equipment.


4. Spray a large area that will protect multiple properties. Spraying a big area is efficient; it won’t require too much time or labor. However, area sprays tend to have a short-lived effect.

  • Use aircraft, loggers, hydraulic sprayer or mist blowers to dispense the chemicals.
  • The find chemical droplets will travel to where flies live, killing the insects.
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