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1 April 2006 Efficacy of Several Insecticide Ear Tags for Control of Horn Flies (Diptera:Muscidae) on Nebraska Beef Cattle
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Abstract

In 1999, three experimental 20% diazinon 20% coumaphos impregnated ear tags and a 40% diazinon ear tag reduced horn fly numbers by 70% at the University of Nebraska Research Ranch near Whitman, Nebraska for 16 weeks. Two other insecticide ear tags, 8% beta cyfluthrin 20% piperonyl butoxide (PBO) and 10% lambdacyfluthrin 13% PBO reduced horn fly numbers by 95% and 86% respectively at a University of Nebraska pasture site near Ithaca, Nebraska for eight weeks. In 2003 some of the same insecticidal ear tags were reevaluated. Ear tags containing 10% zeta-cypermethrin 20% PBO, 20% diazinon 20% coumaphos, 10% lambdacyfluthrin 13% PBO, 8% beta-cyfluthrin 20% PBO and 40% diazinon provided a reduction in horn fly numbers ranging from 81.89% to 88.3% at the University Research Ranch for 12 weeks.

J. B. Campbell, D. J. Boxler, D. C. Adams, and A. F. Applegarth "Efficacy of Several Insecticide Ear Tags for Control of Horn Flies (Diptera:Muscidae) on Nebraska Beef Cattle," Journal of the Kansas Entomological Society 79(2), 113-118, (1 April 2006). https://doi.org/10.2317/0507.30.1
Accepted: 1 November 2005; Published: 1 April 2006
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