Stocker cattle grazing pastures during the summer months face challenges due to horn
flies, which can result in reduced weight gains and less efficient use of forages. One strategy
for controlling horn flies is insecticide-impregnated ear tags. The use of pesticide ear
tags may be an effective management practice to improve overall productivity during
a grazing season. The objective of this study was to evaluate the efficacy of insecticide
ear tags as a means of improving growth of stocker calves grazing native pastures in the
Flint Hills region of Kansas.