title: Evaluation of three synthetic pyrethroids in the control of sheep headfly disease.
abstract: Deltamethrin (0.01 per cent) applied to the heads of lambs and gimmers at 30 day intervals on two separate farms failed to control damage caused by the sheep headfly , Hydrotaea irritans. Permethrin (0.1 per cent) applied to gimmers at monthly intervals achieved a slight reduction in severity of damage but protection did not extend beyond 14 days. Polyvinyl chloride tags containing 8.5 per cent cypermethrin reduced damage in gimmers to a very low level with protection lasting throughout the summer. Weight gains of lambs suffering headfly damage were significantly less than unaffected lambs.
mesh_terms: D000818:Animals; D004175:Diptera; D005260:Female; D007299:Insect Bites and Stings / Q000517:prevention & control / Q000662:veterinary*; D007306:Insecticides; D009570:Nitriles; D026023:Permethrin; D011722:Pyrethrins; D012756:Sheep; D012757:Sheep Diseases / Q000517:prevention & control*
chemical_list: D007306:Insecticides; D009570:Nitriles; D011722:Pyrethrins; C017160:cypermethrin; C017180:decamethrin; D026023:Permethrin