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