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The dispersal and survival of Anopheles Culicifacies Giles (Diptera: Culicidae) in a Sri Lankan village under malathion spraying

Published online by Cambridge University Press:  10 July 2009

P. Rawlings  and
G. Davidson
P. Rawlings
Affiliation:
London School of Hygiene and Tropical Medicine, Keppel Street, London WCIE 7HT, UK
G. Davidson
Affiliation:
London School of Hygiene and Tropical Medicine, Keppel Street, London WCIE 7HT, UK
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Abstract

Two mark-release-recapture experiments with Anopheles culicifacies Giles were carried out immediately before and one month after a round of malathion spraying of houses (at 2 g/m2) in a village in north-western Sri Lanka. In the first experiment the measurement of bidirectional movement of females collected in two halves of the village showed that movement was somewhat affected by wind direction; the percentage of migrants moving partially upwind was greater (11·4) than that in the reverse direction (6·4). The best estimates of daily survival were 0·79 before spraying and 0·44 after spraying; population sizes were about 44 500 and 1300, respectively. The proportion of females resting in the collection huts rose after spraying. The results are discussed with reference to the evolution of insecticide resistance in populations under insecticidal pressure and those populations not selected by spraying.

Type
Research Paper
Information
Bulletin of Entomological Research , Volume 72 , Issue 1 , March 1982 , pp. 139 - 144
Copyright
Copyright © Cambridge University Press 1982

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References

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