Effect of an insecticide controlled-release bolus on a milk antibiotic residue test

Following the use of diflubenzuron controlled-release insecticide boluses in a dairy herd, there was a concern that postcalving cows were testing positive on a milk antibiotic residue test for more milkings than they had prior to the use of diflubenzuron. A field trial was conducted to examine for p...

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