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The collection of aerosol droplets by resting tsetse flies, Glossina morsitans Westwood (Diptera: Glossinidae)

Published online by Cambridge University Press:  10 July 2009

D. R. Johnstone ,
J. F. Cooper ,
H. M. Dobson  and
C. R. Turner
D. R. Johnstone
Affiliation:
Overseas Development Natural Resources Institute, Chatham Maritime, Chatham, Kent, ME4 4TB, UK
J. F. Cooper
Affiliation:
Overseas Development Natural Resources Institute, Chatham Maritime, Chatham, Kent, ME4 4TB, UK
H. M. Dobson
Affiliation:
Overseas Development Natural Resources Institute, Chatham Maritime, Chatham, Kent, ME4 4TB, UK
C. R. Turner
Affiliation:
Overseas Development Natural Resources Institute, Chatham Maritime, Chatham, Kent, ME4 4TB, UK
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Abstract

Insecticidal aerosols dispersed from aircraft are used in control measures against Glossina spp., and the interpretation of spray monitoring data in terms of the likely effect on the flies requires some knowledge of variation of the collection efficiency of the flies under a range of appropriate conditions. A low speed wind tunnel was used to measure the collection efficiencies of the various component parts of an adult of G. morsitans Westwood when at rest on cylinders simulating the branches and twigs of the natural habitat. The wind speed range was from 0·25 to 1·5 m/s and monodisperse droplets 10, 15, 20 and 25 μm in diameter were used. Although certain body zones exhibited very high apparent collection efficiencies (primarily due to interception), the average overall efficiencies varied from as low as 0·8% for 10-μm droplets at 0·25 m/s up to 22% for 25-μm droplets at 1·5 m/s.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 79 , Issue 4 , November 1989 , pp. 613 - 623
Copyright
Copyright © Cambridge University Press 1989

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