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Ampicillin, tetracycline and urea as protozoicides for symbionts of Reticulitermes flavipes and R. virginicus (Isoptera: Rhinotermitidae)

Published online by Cambridge University Press:  10 July 2009

Deborah Ann Waller*
Affiliation:
Department of Biological Sciences, Old Dominion University, Norfolk, USA
*
Deborah A. Waller, Department of Biological Sciences, Old Dominion University, Norfolk, Virginia 23529, USA.

Abstract

The development of palatable baits for the suppresion of pest termites relies on combining phagostimulants with slow-acting toxicants that termite foragers carry back to the colony and distribute to nest-mates. In the present study the palatability and toxic effects of three compounds, ampicillin, tetracycline and urea to the subterranean termites Reticulitermes flavipes (Kollar) and R. virginicus (Banks) were investigated. 1.0% solutions (w/v) of ampicillin and tetracycline applied to filter paper were unpalatable to termites in choice tests, and these concentrations depressed termite feeding, survivorship, individual biomass, and numbers of gut protozoa in no-choice tests. In contrast, urea solutions of 0.1%, 1.0% and 5.0% (w/v) were palatable to termites in choice tests, but 5.0% urea solutions depressed termite survivorship and protozoan numbers in no-choice tests. Addition of urea to tetra- cycline solutions resulted in increased palatability and decreased termite survivorship over tetracycline administered alone. The toxic effects in combination with its palatability to Reticulitermes spp. indicate that urea may be a promising candidate for termite control programmes.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1996

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