JustiFLY® Feedthrough

JustiFLY® Feedthrough

Pest control at the source.

  • Category: Parasiticide
  • Species: Beef Cattle, Dairy Cattle
  • Active Ingredients:


JustiFLY® Feedthrough

Product Information

JustiFLY® is an insect growth regulator used to prevent the development of infestations of horn fly, stable fly, house fly and face fly in the manure of treated beef and dairy cattle and calves. 

Available at your local feedstore:

JustiFLY® 3% 360 gram add pack
JustiFLY® 3% 12 lb. add pack
JustiFLY® 3% 50 lb. bag
JustiFLY® 0.67% Premix 50 lb. bag
JustiFLY® Fly-A-Salt® 50 lb. bag
JustiFLY® Fly-A-Salt® 44 lb. block
JustiFLY® Fly-A-Salt® 20 lb. block
JustiFLY® Fly-A-Salt® 4 lb. block
JustiFLY® Liquid FeedTM add pack
JustiFLY® Pour On 5-5

Available to Feed Mills

JustiFLY® 0.04% Subregistration with your brand


  • Prevents the development in horn flies, stable flies, house flies, and face flies in the manure of treated cattle (lactating and non – lactating beef and dairy cows, slaughter, stocker and feeder cattle and calves, including veal calves).
  • JustiFLY’s active ingredient is diflubenzuron, an Insect Growth regulator (IGR)
  • Just mix and feed. No oily insecticides, no dusts or sprays.
  • Zero animal handling stress.
  • No withdrawal period. No milk disposal issues. 

Storage & Handling

Do not contaminate water or feed by storage or disposal.

PESTICIDE STORAGE: Store in the original container in a cool, dry place.

PESTICIDE DISPOSAL: Waste 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 by shaking and tapping sides and bottom to loosen clinging particles. Empty residue into mixing equipment. Then offer for recycling if available or dispose of empty bag and box in a sanitary landfill or by incineration, or if allowed by State and local authorities, by burning. If burned, stay out of smoke. 

Active Ingredient or Composition


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