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.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.
Vol. 79 • No. 2