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The design of target barriers for tsetse flies, Glossina spp. (Diptera: Glossinidae)

Published online by Cambridge University Press:  10 July 2009

M.O. Muzari
Affiliation:
Tsetse and Trypanosomiasis Control Branch, Harare, Zimbabwe
J.W. Hargrove*
Affiliation:
ODA/IMPI Tsetse Research Project, Zimbabwe
*
Dr J.W. Hargrove, Tsetse and Trypanosomiasis Control Branch, Box CY52, Causeway, Harare, Zimbabwe.

Abstract

Two small-scale experiments were carried out to test the effectiveness of narrow target barriers against re-invasion by Glossina pallidipes Austen and G. m. morsitans Westwood. The barriers consisted of either one or two lines of targets, with the targets placed at distances of c. 16 m apart within the lines. At this spacing the targets are so close together that a fly could scarcely fail to see at least one target as it crossed the barrier. Nonetheless, in both cases, flies penetrated the barriers with probability c. 10% as judged by catches in odour-baited traps on either side of the barrier. Narrow barriers, even at very high target density, are ineffective against tsetse invasion. This accords with previous theoretical predictions and mark-recapture studies, and suggests that wider barriers are needed for the prevention of re-invasion of cleared areas by tsetse.

Type
Review Article
Copyright
Copyright © Cambridge University Press 1996

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References

Brady, J., Griffiths, N. & Paynter, Q. (1995) Wind speed effects on odour source location by tsetse flies (Glossina). Physiological Entomology 20, 293302.CrossRefGoogle Scholar
Burnett, G.F. (1970) Control by insecticides (continued). Residual deposits, aerial and ground application, pyrethrum aerosols. pp. 464489in Mulligan, H.W. (Ed.) The African trypanosomiases. London, George Allen and Unwin.Google Scholar
Buxton, P.A. (1955) The natural history of tsetse flies. Memorandum of the London School of Hygiene and Tropical Medicine, No. 10. London, H.K. Lewis. xviii + 816 pp.Google Scholar
Challier, A. (1965) Amélioration de la méthode de détermination de l'age physiologique des glossines. Étude faites sur Glossina palpalis gambiensis Vanderplank, 1949. Bulletin de la Société de Pathologie Exotique 58, 250259.Google Scholar
Dransfield, R.D., Brightwell, R., Kyorku, C. & Williams, B. (1990) Control of tsetse fly (Diptera: Glossinidae) populations using traps at Nguruman, south-west Kenya. Bulletin of Entomological Research 80, 265276.CrossRefGoogle Scholar
Hargrove, J.W. (1991) Ovarian ages of tsetse flies (Diptera: Glossinidae) caught from mobile and stationary baits in the presence and absence of humans. Bulletin of Entomological Research 81, 4350.CrossRefGoogle Scholar
Hargrove, J.W. (1993) Target barriers for tsetse flies (Glossina spp.) (Diptera: Glossinidae), quick estimates of optimal target densities and barrier width. Bulletin of Entomological Research 82, 197200.CrossRefGoogle Scholar
Hargrove, J.W. (1995) Towards a general rule for estimating the day of pregnancy of field-caught tsetse flies. Physiological Entomology 20, 213223.CrossRefGoogle Scholar
Hargrove, J.W. & Packer, M.J. (1993) Fat and haematin contents of male tsetse flies Glossina pallidipes and G. m. morsitans (Diptera: Glossinidae), caught in odour-baited traps and artificial refuges. Bulletin of Entomological Research 83, 2946.CrossRefGoogle Scholar
Laveissière, C., Gouteux, J.P. & Couret, T. (1980) Essais de méthodes de lutte contre les glossines en zone pré-forestiere de Cote d'Ivoire. 3. Résultats quantitatifs obtenus sur les populations de Glossina palpalis. s. l. Cahiers ORSTOM, Série Entomologie Médicale et Parasitologie 18, 307314.Google Scholar
Shereni, W. (1990) Mark-release-recapture studies to evaluate efficacy of barriers of odour-baited and insecticide-treated targets against invasion by tsetse flies, Glossina spp.(Diptera: Glossinidae). A report on the FAO/GoZ Target Barrier Project, May 1990.Google Scholar
Vale, G.A. (1984) The responses of Glossina (Glossinidae) and other Diptera to odour plumes in the field. Bulletin of Entomological Research 74, 143152.CrossRefGoogle Scholar
Vale, G.A. (1991) Responses of tsetse flies (Diptera: Glossinidae) to odour-baited trees. Bulletin of Entomological Research 81, 323331.CrossRefGoogle Scholar
Vale, G.A., Lovemore, D.F., Flint, S. & Cockbill, G.F. (1988) Odour-baited targets to control tsetse flies Glossina spp. (Diptera: Glossinidae), in Zimbabwe. Bulletin of Entomological Research 78, 3149.CrossRefGoogle Scholar
Willemse, L. (1991) A trial of odour-baited targets to control Glossina morsitans centralis (Diptera: Glossinidae) in west Zambia. Bulletin of Entomological Research 81, 351357.CrossRefGoogle Scholar