Cattle comfort directly influences herd performance. To enhance productivity this summer, producers are encouraged to minimize populations of horn, face and heel flies on their operations. Along with steady productivity, fly control can aid in the prevention of pinkeye – in a year predicted to see high levels of this issue.
Preventing fly discomfort begins by understanding the problem. Steven Myers, consulting beef nutritionist with Land O’Lakes Purina Feed, LLC, explains that both the horn and face fly breed in fresh cow manure and that the horn fly life cycle (from egg to adult) may be as rapid as 10 days in summer temperatures. The life cycle of the face fly is typically three weeks in length.
Though all three fly types are concerning, the small horn fly or Haematobia irritansis shown to cause the most economic damage. Lee Townsend, extension entomologist at the University of Kentucky College of Agriculture, describes horn flies as “small, dark gray flies that feed [primarily] on cattle.
“Both sexes are blood feeders, taking 20 or more blood meals each day with their stiff, needle-like mouthparts,” he explains. “Irritations from the bites annoy animals and, occasionally, the wounds may become infected.”
Myers finds that cattle bothered by horn flies show discomfort by: shaking their heads, stampeding, bunching in fence corners, wading in water, seeking shade to stand in and generally failing to graze normally. Industry research indicates that obvious signs of discomfort begin when fly populations reach 200 flies per animal.
1 “Pinkeye: Bad Year Coming – Prepare to Prevent or Treat.” Livestock Lines. May 2012: Vol. 18, No. 2. University of California Agriculture and Natural Resources. http://cestanislaus.ucdavis.edu/newsletters/Livestock_Lines_Newsletter43243.pdf
2 Townsend, Lee. “Horn Flies and Cattle.” University of Kentucky: 2011. http://www.ca.uky.edu/entomology/entfacts/ef509.asp
3 Townsend, Lee. “Horn Flies and Cattle.” University of Kentucky: 2011. http://www.ca.uky.edu/entomology/entfacts/ef509.asp
4 Johnson, Greg. “Horn Flies on Cattle: Biology and Management.” Montana State University Extension: 2009. http://msuextension.org/publications/AgandNaturalResources/MT200912AG.pdf
For more information on adding a feed-through fly control additive to your nutrition program, contact your beef consulting nutritionist, call 800-227-8941 or go to http://cattle.purinamills.com/Minerals/Products.
Feed-through fly control additives can aid in fly prevention through the summer, helping to promote cow comfort and herd productivity.