Some currently available insecticides and their comparative efficacy on louse-infested, long-woolled sheep

Authors: Bishop DM, Cole DJW, Heath ACG
Publication: New Zealand Veterinary Journal, Volume 40, Issue 3, pp 101-103, Sep 1992
Publisher: Taylor and Francis

Animal type: Livestock, Production animal, Ruminant, Sheep
Subject Terms: Animal remedies/veterinary medicines, Inflammation, Integument/skin/wool/hair/fur/feather, Disease/defect, Treatment/therapy, Pest/pesticides, Agricultural compounds, Parasites - external
Article class: Scientific Article

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Abstract: The comparative efficacy of 13 of the sheep dips currently registered in New Zealand was investigated using sheep infested with the louse Bovicola ovis and carrying wool which was about 10 cm long at the shoulder. With the exception of one synthetic pyrethroid “pour-on” formulation, all products were able to effect a significant reduction in louse populations, relative to untreated controls, for 37 days after treatment. Only four products proved capable of “eradicating” lice and preventing their re-establishment up to 37 days after treatment. Variations in manufacturers` recommendations relating to the length of wool at dipping, and mode of application of dips are discussed in relation to the results.

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