01844naa a2200289 a 450000100080000000500110000800800410001902400400006010000180010024501600011826000090027852009730028765000310126065000090129165000140130065000170131465000170133165000100134865000100135865000180136865300130138665300190139965300170141870000180143570000170145377300840147015215042023-12-11       1983    bl uuuu     u00u1 u    #d7 a10.1080/03015521.1983.104277762DOI1 aKETTLE, P. R.  aEvaluation of a deltamethrin formulation as a back-line treatment of sheep for the control of the sheep body louse (Damalinia ovis).h[electronic resource]  c1983  aAbstract: A formulation containing 1% deltamethrin was tested for efficacy against the sheep body louse. It was applied as a back-line treatment at a rate of 1 m1/5 kg bodyweight (2 mg/kg) to sheep either immediately after shearing or 3 weeks later. The formulation killed all observable lice within a day when applied off-shears to sheep which were subsequently confined overnight. When sheep were treated 3 weeks after shearing, and not subsequently confined, all lice were killed within 2–7 days. About 10 weeks protection from reinfestation was provided by off-shears treatment, and about 15 weeks by treatment 3 weeks after shearing. Breakdown in protection occurred when deltamethrin levels in the wool fell to about 1 ?g/g greasy wool. Although the results suggest high efficacy, residue data indicate that the spread of insecticide was much less even than with plunge dipping in deltamethrin. A method for determining deltamethrin levels in wool is recorded.  aAnimal parasites and pests  aLice  aParasites  aParasitology  aPest control  aSheep  aOvino  aParasitologia  aControle  aDamalinia ovis  aEctoparasito1 aWATSON, A. J.1 aWHITE, D. A.  tNew Zealand Journal of Experimental Agriculturegv. 11, n. 4, p. 321-324, 1983.