Short Communication

In vivo evaluation of amitraz against ticks under field conditions in Ethiopia : research communication

S. Mekonnen
Journal of the South African Veterinary Association | Vol 72, No 1 | a608 | DOI: https://doi.org/10.4102/jsava.v72i1.608 | © 2001 S. Mekonnen | This work is licensed under CC Attribution 4.0
Submitted: 09 July 2001 | Published: 09 July 2001

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S. Mekonnen,

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Abstract

An aqueous emulsion of amitraz (Bovitraz, Bayer AH), prepared and applied according to the manufacturer's recommendations, was evaluated for its activity against cattle ticks on a dairy farm in Ethiopia. Eight crossbred heifer calves aged between 6 and 8 months and heavily infested with ticks were selected and divided into equal treatment and control groups. The calves in the treatment group were hand-sprayed with the amitraz emulsion while the control group was left untreated. Each calf was restrained and ticks were counted and identified in situ. One hundred percent tick control was achieved on Day 3 after acaricide application, and this was maintained for a further 18 days. The residual effect was long, and protected the animals from re-infestation for 21 days. There was a significant difference between the mean number of ticks on the control group compared to the treated group (P < 0.05). An important finding in this trial was the rapid detachment of all tick instars from animals treated with the test acaricide.

Keywords

Amitraz; Control; Dairy Farms; Efficacy Trial; Ethiopia; Tick Infestation

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