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Flies on the Farm: How Farmers Can Help Avoid Them

Updated: Feb 15, 2021

There are a variety of flies consisting of house flies, stable flies, face flies, and horn flies. There are many ways to control flies on the farm to reduce fly population and also help avoid flies from breeding. When flies breed, they are in search of warm and moist areas to lay their eggs.

To control flies on the farm, an Integrated Pest Management (IPM) program can be placed. By implementing a combination of IPM common-sense practices such as the following, you can to help avoid a fly population severity:

  • Cleanliness - Keep areas clean and remove any trash, spilled feed, old food or decaying matter, manure build-up, or pools of water. Flies like to breed in areas such as manure and animal bedding where they can find a moist and warm place to lay their eggs. Maintaining a clean and dry area will further help avoid and control fly population.

  • Contained Areas – Restrict the areas that flies can get to by fly-proofing windows, doors, and any other ways they can reach undesired areas. By checking and sealing off the areas that flies can access, they are limited to the areas they can access.

  • Other IPM practices – For additional ideas and a continued list of IPM practices, a helpful resource would be the EPA site (

How Belstra Can Help Farmers with Fly Control Belstra manufactures a top-dress for cattle, swine, and horses that helps stop flies from maturing during the fly breeding process in manure. BELSTRA ERADI-FLY® PRO+ w/ClariFly® was designed by farmers to control the fly population while also offering animals the benefits of a prebiotic and probiotic crumble.

Belstra partnered with Central Life Sciences to include the ClariFly® feed additive to the BELSTRA ERADI-FLY® PRO+ w/ClariFly® formulation to interrupt the fly life-cycle not allowing larvae to successfully molt and prevent flies from maturing into flying pests. This prebiotic and probiotic fly control was released in 2020 and has already received a positive response from farmers in the midwest.

When used as directed, BELSTRA ERADI-FLY® PRO+ w/ClariFly® provides sufficient diflubenzuron insect growth regulator to prevent the emergence of adult House flies (Musca domestica), Stable flies (Stomoxys calcitrans), Face flies (Musca autumnalis), and Horn flies (Haematobia irritans) from manure of treated cattle and House flies (Musca domestica), Stable flies (Stomoxys calcitrans) from manure of treated swine and equine. Existing adult flies will not be affected.

Contact us by calling 800-276-2789 or emailing us at for more information about BELSTRA ERADI-FLY® PRO+ w/ClariFly® or view our brochure at:

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