Fly Control Tips

Fly Control Tips
8/7/2017

Certain flies are responsible for spreading diseases, so to decrease disease risk to your livestock here are a few tips to reduce the flies’ impact on your farm’s production.

  1. Feed a larvicide or an insect growth regulator early in the season starting 30 days before flies typically emerge. Continue to feed until 30 days after a killing frost.
  2. Pour-ons. During spring turnout time, you can use a product that is labeled to control internal parasites. Later in the year, use products only labeled for flies and/or lice.
  3. Dust bags/cattle rubs. The advantage of a dust bag or rub is that, if placed at a site where all cattle must use it (watering trough, mineral lick), it can provide economical control of face and horn flies. Proper placement and keeping it charged with insecticide are the keys.
  4. Topical sprays. Timely application of fly sprays or paint ball style packets throughout the year can be effective in reducing the fly population, but can be time-consuming if cattle are grazing an extensive area.
  5. Fly tags. The key to using tags is to wait until you have 200 flies/cow to place the tags. Always follow label directions on the number of tags/cow. Be sure to remove tags at the end of the season to prevent resistance problems.
  6. Don’t mix classes of chemicals in the pour-ons, topicals, and fly tags within the same year. Use the same class 1-2 years, then rotate.

A multifaceted approach is best for attaining your goal of “controlling” flies, so using just one strategy from the above list probably won’t give you the results you anticipate.

Article from Dairy Herd Management, June 2017.

Tags: Fly Control