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Responses of tsetse flies (Diptera: Glossinidae) to odour-baited trees

Published online by Cambridge University Press:  10 July 2009

G. A. Vale
G. A. Vale*
Affiliation:
Regional Tsetse and Trypanosomiasis Control Programme, Harare, Zimbabwe
*
Regional Tsetse and Trypanosomiasis Control Programme, P.O. Box A560, Avondale, Harare, Zimbabwe.
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Abstract

Field studies in Zimbabwe elucidated how trees might be enhanced as baits for controlling Glossina morsitans morsitans Westwood and G. pallidipes Austen. Catches from electrocuting devices at the bases of trees were near nil when sampling tsetse flies landing on the trunk but much greater when sampling them flying within 1 m of the trunk. Catches increased 5–8 times when 2 m2 of the trunk were blackened and given odour of acetone, 1-octen-3-ol, 3-n-propyl phenol and 4-methyl phenol, but were still only ca. 30% of the catches from an odour-baited, free-standing, 1 × 1 m screen of black cloth. The upright trunk of real and model trees hindered their attractiveness but leaves and branches 5 m above ground had no clear effect. Real and artificial stumps of trees were as effective as the screen if they were 1 m2, compact and sharply outlined. The practical and biological implications of the results are discussed, with particular reference to the use of insecticide-treated netting with modified tree stumps as baits for control.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 81 , Issue 3 , September 1991 , pp. 323 - 331
Copyright
Copyright © Cambridge University Press 1991

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