Solitude IGR Feed Through Fly Preventive



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6 lb


In Stock. Usually Ships in 1-3 business days.

20 lb


In Stock. Usually Ships in 1-3 business days.

Shipping weight = 9.40 lbs.

Product Summary:

SOLITUDE® IGR Insect Growth Regulator Feed-Through Fly Preventive
by Zoetis, formerly Pfizer

You can substantially reduce your fly population simply by adding a scoop of SOLITUDE® IGR daily to your horse's feed. Regardless of the farms around you, it will reduce flies at your barn. Use it during fly season to eliminate larvae development. It's economical to use, and safe for other pets that might also be eating your horse's manure.

SOLITUDE® IGR (cyromazine) is a non-organophosphate that has been safely used in horses since 2001 and undergone extensive research to prove its effectiveness and safety. It provides feed-through fly prevention and control of house and stable flies in and around horses, horse barns, stables, paddocks, and race tracks. When mixed into a horse's ration daily according to the directions, it works to prevent house and stable fly development. Significant results may be observed within two weeks, but the full benefit should be realized within four to six weeks of administration as the adult populations die off.

Cyromazine, the active ingredient in SOLITUDE® IGR, has a well-documented safety and efficacy profile, It is an insect growth regulator that works on the fly's chitin exoskeleton and is very species-specific to house and stable flies. As the horse is fed cyromazine, it passes through the horse and is excreted in the manure. House flies and stable flies lay their eggs in the manure and the eggs subsequently hatch into the larval or maggot stage. As the maturing maggots feed on the treated manure, they become unable to successfully develop into adult flies because cyromazine inhibits the proper formation of chitin. The immature stage of the fly dies. Cyromazine has no effect on the chitin of the adult fly.


  • Greatly reduces the need for neurotoxic pesticide sprays and overhead fly systems, creating a healthier environment for horses, staff, and riders
  • Intended for use only in equidae including horses, mules, and donkeys
  • Just one scoop per day per horse, no matter the weight or size of horse
  • Once excreted, breaks down to a melamine monomer, a slow release nitrogen fertilizer
  • Repeated studies show up to 100% efficacy in inhibiting larvae development
  • Studies have proven 99.5% effectiveness against stable flies and 100% effectiveness against house flies, with no effect on horses, other mammals or beneficial insects
Item Specifications:

6 lb. pail (192 doses)
20 lb. pail (640 doses)

Start feeding SOLITUDE® IGR early in the spring before flies begin to appear, and continue feeding throughout the summer and into the fall until cold weather inhibits fly development. In some cases, supplemental fly control measures may be needed in and around paddocks and stables to control adult house flies and stable flies, which can breed not only in manure, but in other decaying vegetable matter or silage on premises. SOLITUDE® IGR will provide a high degree of fly control and will give the best results when integrated with a well-managed fly control program that includes appropriate sanitary and management practices to reduce the number and size of fly breeding sites.

To maximize the effectiveness, horses must be fed individually. Made from alfalfa, these pellets are to be fed top-dressed on grain or mixed with the horse's total ration to provide 300mg of cyromazine per horse per day.
Using 1/2 oz. scoop supplied with the product, mix one scoop of SOLITUDE® IGR in the horse's ration every day.


Do not contaminate water, food or feed by storage and disposal. Wastes resulting from the use of this product may be disposed of on site or at an approved waste disposal facility. Harmful if inhaled or absorbed through the skin. Avoid breathing dust and contact with skin or clothing. May cause skin sensitization reactions in certain individuals. Wash thoroughly with soap and water after handling. Do not apply directly to water. 
For additional product information, please see clickable links listed under Downloadable Resources. 


Downloadable Resources
Style Item Number Model Number UPC
2 lb SLT101692 002 PFJ 115
6 lb SLT101692 006 026619 1008721908598
20 lb SLT101692 020 026620 087219086001
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Sometimes, manufacturers require that products be advertised only at their suggested prices. When we choose to sell these items for less, we display the sale price only in the cart. To see the price, click Add to Cart.
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