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1 December 2012 Efficacy of Amitraz-Impregnated Collars on White-Tailed Deer (Artiodactyla: Cervidae) in Reducing Free-Living Populations of Lone Star Ticks (Acari: Ixodidae)
J. M. Pound, K. H. Lohmeyer, R. B. Davey, J. A. Miller, J. E. George
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Abstract

Over a 7 yr period, we monitored the effect of a commercially available, amitraz impregnated anti-tick collar in controlling free-living populations of lone star ticks, Amblyomma americanum (L.) when manually fitted around necks of white-tailed deer, Odocoileus virginianus (Zimmermann). Study animals in treatment and control groups were confined in 38.8 ha game-fenced and densely vegetated treatment plots in South Texas. Tick densities during years 1 and 7 served as untreated pre- and posttreatment comparisons and treatments occurred during years 2 through 5. Reductions in tick densities in the treatment plot were compared against tick densities in a control plot having similar vegetation and numbers of untreated deer. During years of treatment, indices of control pressure ranged from 18.2 to 82.6 for nymphs and 16.9–78.7 for adults, and efficacy, expressed as percentage control during the final year of treatment, was 77.2 and 85.0%, respectively, for nymphal and adult ticks. These data show that acaricidal collar treatments provide efficacies very similar to those achieved with the existing ivermectin-medicated bait and ‘4-Poster’ topical treatment technologies to control ticks feeding on wild white-tailed deer.

J. M. Pound, K. H. Lohmeyer, R. B. Davey, J. A. Miller, and J. E. George "Efficacy of Amitraz-Impregnated Collars on White-Tailed Deer (Artiodactyla: Cervidae) in Reducing Free-Living Populations of Lone Star Ticks (Acari: Ixodidae)," Journal of Economic Entomology 105(6), 2207-2212, (1 December 2012). https://doi.org/10.1603/EC12219
Received: 30 May 2012; Accepted: 7 September 2012; Published: 1 December 2012
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KEYWORDS
Amitraz
collar
neckband
tick control
white-tailed deer
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