Horn Fly (Diptera: Muscidae) Control on Cattle with Insecticide Ear Tags Attached to Backrubbers and Dust Bags1

Abstract
Fenvalerate- or stirofos-impregnated cattle ear tags attached to rope or chain-type back rubbers and to bags containing sand were made available to yearling steers as self-applicating devices. Stirofos tags controlled Haemolobia irritans (L.) for at least 6 weeks and fenvalerate tags remained effective for up to 18 weeks (when tests were terminated). Backrubbers containing plastic resin impregnated with insecticide should provide efficient, long-term, low-maintenance control of the horn fly on cattle.