Altosid IGR

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Altosid IGR Manipulates growth hormones in flies. This is not an all natural product. Only
available in OLS Tubs #1 and #8.


igr fly control feed thru supplement.pdf

Horn Fly Life Cycle (see image above)

  1. Altosid® IGR is ingested with the cattle’s mineral or feed. As they graze, cattle disperse the IGR via their manure.
  2. Adult horn flies live 2-4 weeks, taking 20-40 blood meals per day.
  3. Female flies leave the animal for a few seconds to lay eggs in fresh manure less than 5 minutes old.
  4. In 1-2 days, eggs hatch into larvae.
  5. In 3-5 days, the larvae molt into pupae.
  6. Pupae molt into adults in 6-8 days. Altosid® IGR breaks the life cycle here before that happens, preventing adults from emerging.

Control Resistant Flies

An effective fly control program keeps horn fly levels at less than 200 flies per animal. Altosid® IGR controls horn flies resistant to the organophosphates and pyrethroids commonly used in conventional horn fly control products. In more than 40 years of use, there have been no known cases of insect resistance to Altosid® IGR.


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