Evaluation of ear tags impregnated with cypermethrin for the control of sheep body lice (Damalinia ovis)

James, P.J., Erkerlenz, P. and Meade, R.J. (1990) Evaluation of ear tags impregnated with cypermethrin for the control of sheep body lice (Damalinia ovis). Australian Veterinary Journal, 67 4: 128-131.


Author James, P.J.
Erkerlenz, P.
Meade, R.J.
Title Evaluation of ear tags impregnated with cypermethrin for the control of sheep body lice (Damalinia ovis)
Journal name Australian Veterinary Journal
Publication date 1990-04
Sub-type Article
DOI 10.1111/j.1751-0813.1990.tb07728.x
Volume number 67
Issue number 4
ISSN 0005-0423;1751-0813
Start page 128
End page 131
Total pages 4
Place of publication Oxford, United Kingdom
Publisher Wiley-Blackwell Publishing
Language eng
Abstract The application of polymer matrix ear tags impregnated with 8.5% w/w cypermethrin to 6 wethers following shearing reduced lice to non-detectable levels on 4 of them at 29 weeks after tagging. At the conclusion of the study at 45 weeks the mean count of lice on tagged wethers was 3 per sheep compared to 158 on untreated wethers. In a second experiment, 6 non-infected sheep were treated at shearing with cypermethrin tags, 6 with 25 g/l cypermethrin backline formulation, 6 with tags plus backline and 6 were left untreated. Each group was exposed to 6 sheep with moderate to heavy infestations of lice. Compared to controls, all treatments delayed infestation, but cypermethrin tags gave no longer protection than backline treatment. All sheep were infested by 17 weeks after commencement of the study. At 45 weeks mean counts of lice were 38, 27, 20 and 74 respectively for sheep treated with tags, backline formulation, backline plus tags and untreated. Possible reasons for the better effect observed from applying tags to infested sheep than to sheep which were not infected at application but which were subsequently exposed to infested sheep are discussed.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ
Additional Notes Article first published online: 10 March 2008.

Document type: Journal Article
Sub-type: Article
Collection: Queensland Alliance for Agriculture and Food Innovation
 
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