Thermo-Lix® 16% IGR Fly Relief Tub

A nutritional supplement containing S-Methoprene Insect Growth Regulator for continuous feeding to all classes of beef and dairy cattle through the horn fly season. Contains Altosid®.

Product Code: TUBFLY
Size: 200 lb
Product Form:
Medicated: (S)-Methoprene (CAS #65733-16-6)

Features and Benefits

  • This product will provide sufficient (s)-methoprene insect growth regulator to prevent the mergence of adult horn flies from manure of treated cattle. Existing adult horn flies will not be affected.
  • Molasses and added fat provides food for the rumen bugs to help speed up the rate of passage of feedstuffs through the animals’ digestive system
  • To learn more about this fly control technology, visit
  • No binders or hardener


Crude Protein


Crude Fat


Crude Fiber


Start feeding before horn flies appear and continue use until cold weather marks the end of the horn fly season. Allow free choice to cattle. Cattle should consume 34 mg of (S)-Methoprene per 100 lb of animal body weight per month to achieve horn fly control. This is equivalent to an average of 1.6 oz. of Thermo-Lix 16% Fly Relief per 100 lb of animal body weight per day, which is equivalent to 16 oz per day for a 1,000 lb animal.


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