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Insects 2014, 5(4), 832-848; doi:10.3390/insects5040832

Evaluation of Liquid and Bait Insecticides against the Dark Rover Ant (Brachymyrmex patagonicus)

Department of Entomology, University of Arizona, 1140 E South Campus (Forbes Bldg.) Room 410, Tucson, AZ 85721-0036, USA
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Received: 22 August 2014 / Revised: 19 September 2014 / Accepted: 28 October 2014 / Published: 4 November 2014
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Abstract

Dark rover ants (Brachymyrmex patagonicus, Mayr) are an exotic ant species native to South America that has recently spread through the southern US. We evaluated the residual activity of three liquid insecticides (indoxacarb, fipronil and lambda-cyhalothrin) as potential barrier treatments against these ants. The factors we considered include the use of a porous or non-porous surface, a short or long exposure time and the changes in insecticide activity after treatment during a 90 day period. We also tested the effect of baits containing three different active ingredients (imidacloprid, sodium tetraborate and indoxacarb) on colony fragments of this species for a 15 day period. Both lambda-cyhalothrin® and indoxacarb® resulted in high levels of ant mortality up to 90 days after application. The results of exposure to fipronil® resembled those from the control treatment. Application of insecticides on a porous surface and the shorter exposure time generally resulted in greater ant survival. Of the baits tested, only the imidacloprid based one decreased ant survival significantly during the evaluation period. Within three days, the imidacloprid bait produced over 50% mortality which increased to over 95% by the end of the experiment. Results from the other two bait treatments were not significantly different from the control. View Full-Text
Keywords: dark rover ant; Brachymyrmex; fipronil; indoxacarb; imidacloprid; lambda-cyhalothrin; borax; ant bait dark rover ant; Brachymyrmex; fipronil; indoxacarb; imidacloprid; lambda-cyhalothrin; borax; ant bait
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Miguelena, J.G.; Baker, P.B. Evaluation of Liquid and Bait Insecticides against the Dark Rover Ant (Brachymyrmex patagonicus). Insects 2014, 5, 832-848.

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