Sheep & Goat

Fly management programs on farms that handle livestock, such as sheep and goats, need to be proactive. When stable fly populations reach 50 to 60 flies per animal, you can see a dramatic reduction in animal performance. ClariFly® Larvicide will not directly affect livestock health or production, but it will take care of the house and stable flies that do.

To control house and stable flies, all sheep and goats on the premises need to consume adequate quantities of ClariFly® Larvicide. The dosage is proportional to the animal’s body weight and must be offered daily throughout the entire fly season. For sheep and goats, the daily feeding rate of the active ingredient is 0.4 mg. per kg. of body weight per day, with no withdrawal period.

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Understanding the Problem

In operations that handle livestock, such as sheep and goats, fly populations can grow quickly and spread to neighboring operations and communities. In addition to decreasing sheep and goat performance levels, flies are a vector for costly diseases such as mastisis and pink eye. When conditions are right, flies can spread illness at alarming rates. When these fly populations are out of control, sheep and goat operations feel it at their bottom line.

Practicing good sanitation, maintaining building repairs, and utilizing baits and traps, such as those in the Starbar® line of products, in conjunction with ClariFly® Larvicide, can significantly impact fly control. The key is eliminating breeding habitats. Manure can account for 60-70% of fly breeding when raising sheep and goats. ClariFly® Larvicide goes to work in manure, stopping larval development and decreasing fly populations.

Learn more about house flies and house fly control  by clicking on this icon. Feed-through fly control starts with understanding the problem.

House Fly

  • House flies carry diseases that are a risk to both livestock and workers.
  • House fly populations can spread to neighboring farms and homes. It is best practice to institute a control program before a complaint is issued.
  • House fly control improves the work environment.
Understand horn flies, their feeding habits and the reasons why horn fly control is so essential for on operations by clicking this horn fly icon.

Stable Fly

  • Irritation by the stable fly biting causes livestock to consume less feed, to grow at a slower rate and to convert less feed into body mass.
  • Stable fly irritation can contribute to increased “stress” in livestock, causing reduced feed intake during summer months, reducing overall performance.
  • When infested by stable flies, livestock will bunch – an indication that performance/cost of gain is being affected to the point of profit loss.
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Fly Management Through IPM

Effective control of costly, damaging flies on a sheep and goat operation is dependent on a complete integrated pest management (IPM) program.. An IPM program incorporates several routine practices and control methods, in addition to a feed-through that helps keep fly populations in check and below an established economic threshold – the calculated number of flies per animal in which the economic losses outweigh the costs to control them.

Studies have shown that reduced fly populations can improve feed efficiencies. When sheep and goats are less agitated they stay on feed and are more productive. An IPM program including ClariFly® Larvicide can help increase your bottom line.

Building an IPM program can be broken down to three phases: planning, implementation and evaluation.

Click on the pie chart below to learn more.

Pie Chart

For a more detailed look at IPM, download our Integrated Pest Management Program Planning Guide.
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How Feed-Through Products Work

Conventional insecticides – often referred to as adulticides – kill flies by attacking their nervous systems. Feed-through products such as ClariFly® Larvicide work by interrupting the fly’s life cycle, rather than through direct toxicitiy. The active ingredient in ClariFly® Larvicide specifically targets flies in the larval stages of pupation by disrupting the proper development of an exoskeleton. Without an exoskeleton, flies are unable to survive into adulthood.

When a feed-through like ClariFly® Larvicide is mixed into feed or feed supplements, cattle ingest it as part of their daily feed intake. The feed-through then passes through the animals’ digestive systems, ending up in their manure, where flies lay eggs. It is here that the fly life cycle is interrupted. Independent studies show that ClariFly® Larvicide can reduce fly populations in the manure of animals treated with ClariFly® Larvicide by as much as 96.7%.*

For best results, ClariFly® Larvicide should be added to your feed supplement 30 days before fly emergence (typically when average daily temperatures reach 65 degrees) and continued throughout the season until 30 days after the first frost. To learn more about the 30/30 program, download our 30/30 White Paper. 

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ClariFly® Larvicide Formulations

Selecting the right formulation of feed-through is the key to effectiveness. It is not only dependent on the size of the operation and the intensity of the fly problem, but also on which products your organization has access to and actively sells.

ClariFly® Larvicide can be premixed and floor stocked at dealerships when proper end use registrations have been granted. End use registrations have been granted for numerous concentrations available in blocks, tubs, granules, add packs and finished feeds. ClariFly® Larvicide can also be custom blended into a producer’s specified ration when requested. It is important to select the right formulation for your customer as well as your dealership. To find out which product best suits your needs, contact your ClariFly® Larvicide representative to get more information.

To learn more about these formulations, visit

ClariFly® Larvicide Formulations:

  • ClariFly® Larvicide Add Pack Fly Control - An additive for milk and milk replacer designed for calf consumption.
  • ClariFly® Larvicide Livestock Premix 0.67% - Premixed into feed with a .67% active ingredient level (also available for custom blending).
  • ClariFly® Larvicide Livestock Premix 0.04% - Premixed or top-dressed into feed with a .04% active ingredient level.
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Become Certified

This is an opportunity to become certified in Centralized Fly Control. By no means an official designation, Centralized Fly Control Certification will improve your feed-through knowledge so you can provide your customers with accurate product knowledge and expertise in how to control flies across a variety of livestock markets.

Become Certified