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The potential for insecticide resistance in Glossina (Diptera: Glossinidae)— an investigation by computer simulation and chemical analysis

Published online by Cambridge University Press:  10 July 2009

I. Maudlin ,
C. H. Green  and
F. Barlow
I. Maudlin
Affiliation:
Tsetse Research Laboratory, University of Bristol School of Veterinary Science, Longford, Bristol, BS18 7DU, UK
C. H. Green
Affiliation:
Tsetse Research Laboratory, University of Bristol School of Veterinary Science, Longford, Bristol, BS18 7DU, UK
F. Barlow
Affiliation:
Centre for Overseas Pest Research, Division of Chemical Control, Porton Down, Salisbury, Wilts, UK
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Abstract

A computer model of a tsetse population was developed to determine whether insecticide resistance could evolve as a result of current tsetse control programmes. Chemical analyses were also carried out which showed that Glossina morsitans morsitans Westw. can metabolise DDT to DDE, indicating a potential for insecticide resistance in this species. The model showed that a completely isolated tsetse population stands little chance of surviving attacks with insecticides repeated at short intervals. However, when sufficient time is allowed between applications, such a population may survive and evolution of resistance take place. Given a small amount of immigration, the evolution of resistance is retarded, but population extinction is prevented. The degree of resistance developed by a population also depends on the dominance relationship of a resistant gene with its wild-type allele and on the reproductive fitness of the mutant. It is suggested that control strategies are adopted which would minimise the risk of insecticide resistance becoming a problem in tsetse and that susceptibility studies are carried out both before spraying operations and on any residual population post-spraying.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 71 , Issue 4 , December 1981 , pp. 691 - 702
Copyright
Copyright © Cambridge University Press 1981

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