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The magnitude of site and time interaction effect in tsetse fly (Diptera: Glossinidae) trap catches

Published online by Cambridge University Press:  10 July 2009

A. Odulaja ,
S. Mihok  and
I.M. Abu-Zinid
A. Odulaja*
Affiliation:
International centre of Insect physiology and ecology (ICIPE), Po Box 30772, Nairobi, Kenya
S. Mihok
Affiliation:
International centre of Insect physiology and ecology (ICIPE), Po Box 30772, Nairobi, Kenya
I.M. Abu-Zinid
Affiliation:
International centre of Insect physiology and ecology (ICIPE), Po Box 30772, Nairobi, Kenya
*
* Fax: 254 2 803360 E-mail: icipe@cgnet.com
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Abstract

Site and time effects are important factors determining trap catches of tsetse flies. These factors may interact significantly and therefore confound interpretation of time series data used for population monitoring. We therefore investigated the magnitude and importance of site × time interactions in trap catches of Glossina pallidipes Austen and G. longipennis Corti using a 2200 trap-days (400 trap-months) data set. The interaction was found to be siginificant (p<0.05) in 46–100% of the combinations of different numbers of months and sites between 2 and 12. The mean percent variance due to the interaction ranged between 4% and 28% for G. pallidipes and 12% and 36% for G.longipennis. The interaction was usually less important than the effect of site alone but more important than the effect of time alone. These results suggest that tsetse researchers should examine critically the adequacy of existing approaches to population monitoring with traps and to testing new traps and odour baits.

Type
Research Article
Information
Bulletin of Entomological Research , Volume 88 , Issue 1 , February 1998 , pp. 59 - 64
Copyright
Copyright © Cambridge University Press 1998

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References

Brightwell, R., Dransfield, R.D., Kyorku, C., Golder, T.K. & Mungai, D. (1987) A new trap for Glossina pallidipes. Tropical Pest Management 33, 151–159.CrossRefGoogle Scholar
Brightwell, R., Dransfield, R.D. & Kyorku, C. (1991) Development of low-cost tsetse trap and odour baits for Glossina pallidipes and G. longipennis in Kenya. Medical and Veterinary Entomology 5, 153–164.Google Scholar
Brightwell, R., Dransfield, R.D. & Williams, B.G. (1992) Factors affecting seasonal dispersal of the tsetse flies Glossina pallidipes and G. longipennis (Diptera: Glossinidae) at Nguruman, south-west Kenya. Bulletin of Entomological Research 82, 167–182.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, 265–176.CrossRefGoogle Scholar
Glasgow, J.P. & Duffy, B.J. (1961) Traps in field studies of Glossina pallidipes Austen. Bulletin of Entomological Research 52, 795–814.CrossRefGoogle Scholar
Green, C.H. (1994) Bait methods for tsetse fly control. Advances in Parasitology 34, 229–291.Google Scholar
Hargrove, J.W. (1981) Tsetse dispersal reconsidered. Journal of Animal Ecology 50, 351–373.CrossRefGoogle Scholar
Hargrove, J.W. & Vale, G. (1978) The effect of host odour concentration on catches of tsetse flies (Glossinidae) and other Diptera in the field. Bulletin of Entomological Research 68, 607–612.CrossRefGoogle Scholar
Hargrove, J.W. & Vale, G. (1980) Catches of Glossina morsitans Westwood and G. pallidipes Austen from odour baited traps in riverine and deciduous woodlands in the Zambezi Valley of Zimbabwe. Bulletin of Entomological Research 70, 571–578.Google Scholar
Hicks, C.R. (1973) Fundamental concepts in the design of experiments. 2nd edn.Holt, Rinehart and Winston, Inc. USA.Google Scholar
Leak, S.G.A., Mulatu, W., Rowlands, G.J. & D'Ieteren, G.D.M. (1995) A trial of a cypermethrin pour-on' insecticide to control Glossina pallidipes, G. fuscipes fuscipes and G.morsitans submorsitans (Diptera: Glossinidae) in south-west Ethiopia. Bulletin of Entomological Research 85, 241–251.Google Scholar
Morris, K.R.S. & Morris, M.G. (1949) The use of traps against tsetse in West Africa. Bulletin of Entomological Research 39, 491–528.CrossRefGoogle ScholarPubMed
Smith, I.M. & Rennison, B.D. (1961) Studies on the sampling of Glossina Pallidipes Austen. I. The numbers caught daily on cattle in Morris traps on a fly round. Bulletin of Entomological Research 52, 165–182.Google Scholar
Swallow, W.H. & Monahan, J.F. (1984) Monte Carlo comparison of ANOVA, MIVQUE, REML and ML estimators of variance components. Technometrics 26, 47–57.Google Scholar
Vale, G.A. (1993) Visual responses of tsetse flies (Diptera: Glossinidae) to odour-baited targets. Bulletin of Entomological Research 83, 277–289.CrossRefGoogle Scholar
Vale, G.A. & Hargrove, J.W. (1979) A method of studying the efficiency of traps for tsetse flies. (Diptera: Glossinidae) and other insects. Bulletin of Entomological Research 69, 183–193.CrossRefGoogle Scholar
Williams, B., Dransfield, R. & Brightwell, R. (1990a) Monitoring tsetse fly population I. The intrinsic variability of trap catches of Glossina pallidipes at Nguruman, Kenya. Medical and Veterinary Entomology 4, 167–179.Google Scholar
Williams, B., Brightwell, R. & Dransfield, R. (1990b) Monitoring tsetse fly populations II. The effect of climate on trap catches of Glossina pallidipes. Medical and Veterinary Entomology 4, 181–193.Google Scholar