resistance, synthetic pyrethroid, Horn Fly Haematobia irritans
Ear tags containing the organophosphate insecticide chlorpyrifos have been effective in the control of resistant horn flies in three western South Dakota localities during 1986. Resistance levels of 50-fold to pyrethroid insecticide were detected in horn fly populations at Cottonwood, Colome and Sturgis.
Number of Pages
South Dakota State University
Copyright © 1986 South Dakota State University
Easton, Emmert R., "The Status of Horn Fly Resistance in South Dakota" (1986). South Dakota Beef Report, 1986. 18.