| Abstract: | Laboratory tests in a fly chamber and field trials in the UK and Australia have shown that permethrin, (3-phenoxybenzyl (1R,1S)-cis,trans-3-(2,2-dichlorovinyl)-2, 2-dime-thylcyclopropanecarboxylate) containing 25: 75 cis: trans isomers, applied as water emulsions to cattle and horses will control biting flies. Satisfactory protection against the stable fly, Stomoxys calcitrans (L.) and excellent control against the horn fly, Haematobia (Lyperosia) irritans (L.) was achieved on cattle. Good control was obtained on horses against the stable fly and the sand fly Culicoides spp. These early results are encouraging and toxicity and residue data suggest that permethrin would be a safe insecticide to use on livestock for the control of biting flies of veterinary importance. |
