Effects of Bayofly on specimens of Culicoides species when incubated in hair taken from the feet of previously treated cattle and sheep.

Sheep and cattle were treated with Bayofly™ pour-on containing 1 g cyfluthrin per 100 ml ready-to-use solution. Seven, 14, 21 and 28 days after treatment, hair was clipped off from the back and feet and mixed for 10–15 s, 30 s, 1 or 2 min with freshly caught Culicoides midges. It was found that the insecticide on hair from the legs – the predominant biting site of midges – had a significant killing effect on Culicoides for 3–4 weeks, even after a short-term contact.