Surface applicators for the control of lice and keds on sheep

摘要

Summary An account is given of trials using dusts, a high-pressure mist, and a low-pressure spray for the control of lice (Damalinia ovis) and keds (Melophagus ovinus) on sheep, using, principally, dieldrin as the insecticide. Three per cent dieldrin dusts, and sprays containing 0.0625% to 0.2% dieldrin gave satisfactory results, provided that a minimum of 20 mg/kg of active ingredient, distributed over the whole sheep, was deposited.