This Product Information Sheet is not intended to replace the Product Label. Always read the Product Label for the most current nutrient content and feeding directions.

Product #37480

Ultralyx® Hi Mag with IGR

Product number: 37480

Product Information

Prevents adult horn fly emergence from manure of treated cattle. A nutritional supplement containing S-Methoprene* Insect Growth Regulator for continuous feeding to cattle through the horn fly season.

  • Contains Altosid Insect Growth Regulator (IGR) for safe, effective control of horn flies
  • Added magnesium ideal for aid in the prevention of grass tetany
  • Economical source of high quality minerals and reliable fly control

Feeding Instructions


This product contains high levels of copper. Consumption of this product by sheep or goats may result in copper toxicity. Causes substantial but temporary eye injury. Do not get in eyes or on clothing. Wear protective eyewear (goggles, face shield, or safety glasses). Wash thoroughly with soap and water after handling. Remove contaminated clothing and wash clothing before reuse.

ENVIRONMENTAL HAZARDS: Do not apply directly to water, or to areas where surface water is present, or to intertidal areas below mean high water mark.

STORAGE AND DISPOSAL: Do not contaminate water, food or feed by storage or disposal.
STORAGE: Store in a cool place.
PESTICIDE DISPOSAL: Wastes resulting from the use of this product may be disposed of on-site or at an approved waste disposal facility.
CONTAINER HANDLING: Nonrefillable container. Do not reuse or refill this container. Completely empty bag, then offer for recycling if available, or dispose of empty bag in a sanitary landfill or by incineration, or, if allowed by State and local authorities, by burning. If burned, stay out of smoke.

DIRECTIONS FOR USE: It is a violation of Federal Law to use this product in a manner inconsistent with its labeling.

Feeding Recommendations:
When used as directed, ULTRALYX Hi Mag with IGR will provide sufficient S-methoprene insect growth regulator to prevent the emergence of adult horn flies from manure of treated cattle. Existing adult horn flies will not be affected. 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 an average of 0.4 ounces of this product per 100 lbs of bodyweight per day, which is equivalent to 4 ounces per day for a 1000-lb. animal.

  1. Assure cattle are not starved for nutrients in ULTRALYX Hi Mag with IGR by providing them prior to feeding ULTRALYX Hi Mag with IGR.
  2. Offer cattle 50 pounds for every 15 head of cattle.
  3. Remove all other self-limiting nutritional supplements.
  4. Locate ULTRALYX Hi Mag with IGR where cattle congregate (watering, loafing, shade areas).
  5. Replenish ULTRALYX Hi Mag with IGR on a regular basis as needed.
  6. If intake of ULTRALYX Hi Mag with IGR is below 0.4 oz. per 100 lbs. animal body weight per day, increase the number of feeding locations and/or change locations to areas more frequented by cattle.
  7. If intake of ULTRALYX Hi Mag with IGR is above 0.4 oz. per 100 lbs. animal body weight per day, reduce the number of feeding locations and/or change locations to areas less frequented by cattle.
  8. Introduction of this product after adult horn fly infestation is established will require treatment of cattle with adulticides if elimination of the adult fly population is desired.

Altosid® is a registered trademark of Wellmark International

Nutrition Information

Calcium, Min13.00%
Calcium, Max15.60%
Phosphorus, Min1.00%
Salt, Min22.70%
Salt, Max27.20%
Magnesium, Min12.00%
Copper, Min1,500 ppm
Iodine, Min45 ppm
Manganese, Min4,000 ppm
Selenium, Min26 ppm
Zinc, Min4,000 ppm
Vitamin A, Min200,000 IU/lb
Vitamin D-3, Min20,000 IU/lb
Vitamin E, Min20 IU/lb

Product Ingredients

Active Drug Ingredient:
Other Ingredients...............99.99%

Calcium Carbonate, Magnesium Oxide, Salt, Molasses Products, Processed Grain By-Products, Monocalcium Phosphate, Dicalcium Phosphate, Vegetable Oil, Manganous Oxide, Manganese Sulfate, Zinc Oxide, Zinc Sulfate, Copper Sulfate, Selenium Yeast, Brewers Dried Yeast, Ethylenediamine Dihydroiodide, Calcium Iodate, Cobalt Carbonate, Vitamin A Supplement, Vitamin D-3 Supplement, Vitamin E Supplement, Mineral Oil and Red Iron Oxide.