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 #643K

Bovalyx® Protein Block IGR.005 Low Moisture Block

Product number: 643K

Product Information

A mineral supplement containing S-Methoprene Insect Growth Regulator for continuous feeding to cattle through the horn fly season.

  • Reliable, self-fed delivery of Altosid Insect Growth Regulator (IGR) for safe, effective control of horn flies
  • Consistently draws cattle to feeding stations, even under summer conditions
  • Low intake keeps daily supplement costs low
  • Delivers balanced levels of protein, energy, minerals and vitamins in addition to Altosid IGR
  • Convenient, 200-lb plastic tub treats 20 cattle for approximately 20 days
  • No-waste self-fed delivery system saves you money

ALTOSID® Insect Growth Regulator is a registered trademark of Wellmark International.

Feeding Instructions

NOTE: Follow all label directions. Feeding selenium at levels in excess of 0.3 ppm in the total diet is prohibited.


This product contains high levels of copper. Consumption of this product by sheep or goats may result in copper toxicity.

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, dry 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 DISPOSAL: Nonrefillable container. Do not reuse or refill this container. Triple rinse (or equivalent). Then offer for recycling if available or puncture and dispose of in a sanitary landfill or by incineration, or if allowed by State or Local authorities, by burning. If burned, stay out of smoke.

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

When used as directed, BOVALYX Protein Block Containing 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 0.8 ounces of this product per 100 lbs. of animal body weight per day, which is equivalent to 8 ounces per day for a 1,000 pound animal.

  1. Assure cattle are not starved for nutrients prior to feeding BOVALYX Protein Block Containing IGR.
  2. Offer cattle 125 pounds of BOVALYX Protein Block Containing IGR for every 15 to 25 head of cattle.
  3. Remove all other self-limiting nutritional supplements.
  4. Locate BOVALYX Protein Block Containing IGR where cattle congregate (watering, loafing, shade areas).
  5. Replenish BOVALYX Protein Block Containing IGR on a regular basis as needed.
  6. If intake of BOVALYX Protein Block Containing IGR is below 0.8 ounces 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 BOVALYX Protein Block Containing IGR is above 0.8 ounces 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.

Nutrition Information

Crude Protein, Min12.00%
Crude Fat, Min3.00%
Crude Fiber, Max2.00%
Calcium, Min3.00%
Calcium, Max4.00%
Phosphorus, Min3.00%
Salt, MinNone Added
Magnesium, Min3.00%
Potassium, Min2.00%
Cobalt, Min4 ppm
Copper, Min400 ppm
Iodine, Min20 ppm
Manganese, Min1,600 ppm
Selenium, Min8.8 ppm
Zinc, Min1,600 ppm
Vitamin A, Min50,000 IU/lb
Vitamin D-3, Min5,000 IU/lb
Vitamin E, Min50 IU/lb

Product Ingredients

Active Drug Ingredient:
Other Ingredients...............99.995%

Molasses Products, Monocalcium Phosphate, Dicalcium Phosphate, Calcium Carbonate, Plant Protein Products, Magnesium Oxide, Hydrolyzed Vegetable Oil, Manganese Sulfate, Zinc Sulfate, Zinc Oxide, Copper Sulfate, Ferrous Sulfate, Ethylenediamine Dihydroiodide, Calcium Iodate, Cobalt Carbonate, Sodium Selenite, Vitamin A Supplement, Vitamin D-3 Supplement, Vitamin E Supplement and Mineral Oil.