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Prospects for using odour-baited trees to control tsetse flies (Diptera: Glossinidae)

Published online by Cambridge University Press:  10 July 2009

G. A. Vale ,
J. Wilcox  and
J. Abson
G. A. Vale*
Affiliation:
Regional Tsetse and Trypanosomiasis Control Programme, Harare, Zimbabwe
J. Wilcox
Affiliation:
Biology Department, University of Southampton, UK
J. Abson
Affiliation:
Zoology Department, Rhodes University, Republic of South Africa
*
G.A Vale, Regional Tsetse and Trypanosomiasis Control Programme, PO Box A560, Avondale, Harare, Zimbabwe
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Abstract

Field studies in Zimbabwe elucidated the responses of Glossina morsitans morsitans Westwood and G. pallidipes Austen to natural and artificial trunks of trees baited with odours of acetone, 1-octen-3-ol and phenols. The numbers of tsetse electrocuted in flight near the base of the trunk increased 2–12 times when the trunk was shortened from 7.2 m to 0.9 m and its diameter was increased from 25 cm to 5 m, when the base was coloured blue or black to contrast with the upper trunk, or when the upper trunk was separated from the base by a gap of 2.7 m. A swarm flying near short trunks was more compact than near tall trunks. Electrocuting grids to catch alighting tsetse indicated that only about 20% of the attracted tsetse alighted on the base of the trunk, whether this was blue or blue/black. Since there is presently no apparent means of cost-effectively avoiding the inhibitory effects of tall trunks, the use of odour-baited trees as baits for tsetse control seems uneconomical.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 84 , Issue 1 , March 1994 , pp. 123 - 130
Copyright
Copyright © Cambridge University Press 1994

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