Efficacy Summaries

Horn fly control by feeding of Altosid® IGR to cattle was evaluated in Illinois, Kentucky, North & South Carolina and Texas. A number of cattle supplements containing 0.02%, 0.01% and 0.005% Altosid® were administered on a free-choice basis to evaluate inhibitory effects on the development of adult horn flies in fecal pats.

 

Illinois

Illinois

*Data on file.

(Figure 1) This chart represents the average number of adult horn flies per side when animals were fed 0.02% Altosid® IGR Mineral.

 

The above information shows that adult horn fly counts on cattle treated on a free-choice basis with 0.02% Altosid® IGR Granular Cattle Supplement as part of a mineral mix resulted in a 95% reduction of horn flies over untreated herds. Further, horn fly development was effectively reduced in feces from cattle fed 0.02% Altosid® IGR Granular Cattle Supplement.

 

South Carolina

Adult horn fly counts remained fairly constant throughout the treatment period on treated cattle (Figure 2), while counts on untreated cattle steadily increased.

Illinois

*Data on file.

(Figure 2) This chart represents the average number of adult horn flies per side after cattle received a 0.02% Altosid® IGR Granular Cattle Supplement.

 

Kentucky

Illinois

*Data on file.

(Figure 3) This chart represents the effectiveness of
(S)-Methoprene against horn flies when cattle are given 0.02% Altosid® IGR Granular Cattle Supplement.

 

Texas

A custom liquid feed formulated using Altosid® IGR 1% Liquid to provide 0.00125% (S)-Methoprene was offered to cattle. Within four weeks of the start of the trial, the horn fly population was greatly reduced and remained below the economic threshold through the conclusion of the study.

Illinois

*Data on file.

 

(Figure 4) This chart represents the average number of adult horn flies per side.

 

North Carolina

Illinois

*Data on file.

(Figure 5) This chart represents the average number of adult horn flies per side when animals were fed a 0.01% Altosid® IGR Mineral Block.

Illinois

*Data on file.

 

(Figure 6) This chart represents the average number of adult horn flies per side when animals were fed a 0.005% Altosid® IGR Mineral Tub.

Illinois

*Data on file.

 

(Figure 7) This chart represents the average number of adult horn flies per side when animals were fed a 0.02% and a 0.01% Altosid® IGR Mineral.