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16 May 2017 Efficacy of Bistrifluron Termite Bait on Coptotermes lacteus (Isoptera: Rhinotermitidae) in Southern Australia
Garry A. Webb
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Abstract

Bistrifluron, a benzoylphenyl urea compound, was evaluated for efficacy against Coptotermes lacteus (Froggatt), a mound-building species in southern Australia. Bistrifluron bait (tradename Xterm) was delivered as containerized pellets inserted into plastic in-ground feeding stations implanted in the sides of mounds. Termites actively tunneled in the gaps between pellets and removed bait from the canisters. Two separate trials were conducted, one commencing on 22 September 2011 and the second commencing on 30 November 2011. In trial 1, all 13 treated colonies (seven single and six double treatments) were eliminated within 19 wk, while all five untreated colonies remained healthy. In trial 2, all four treated colonies were eliminated within 14 wk. In trial 1, bait consumed or removed in treated mounds averaged 105 g for single treatments and 147 g for dual treatments, and overall ranged from 7 to 309 g (70–3,090 mg bistrifluron). In trial 2, the four treated colonies removed an average of 85 g of bait. At the time mounds were dismantled, all showed signs of inattention: external cracking, delamination, and general external weathering. Mound repair and temperature profile data indicate that colony decline commenced much earlier than 19 wk and 14 wk, respectively, for trials 1 and 2, from as early as 4 wk onward. The ability of colonies to repair mound damage was impaired as early as 4 wk in some colonies, and mean internal mound temperatures in treated mounds began declining from 8 wk onward and clearly diverged from mean temperatures of untreated mounds thereafter.

© The Authors 2017. Published by Oxford University Press on behalf of Entomological Society of America. All rights reserved. For Permissions, please email: journals.permissions@oup.com
Garry A. Webb "Efficacy of Bistrifluron Termite Bait on Coptotermes lacteus (Isoptera: Rhinotermitidae) in Southern Australia," Journal of Economic Entomology 110(4), 1705-1712, (16 May 2017). https://doi.org/10.1093/jee/tox133
Received: 22 January 2017; Accepted: 21 April 2017; Published: 16 May 2017
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