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Efficiency of the biconical trap and biases in catches of female and tenerals of Glossina pallidipes, Austen

Published online by Cambridge University Press:  19 September 2011

Mary L. A. Owaga
Mary L. A. Owaga
Affiliation:
The International Centre of Insect Physiology and Ecology (ICIPE), P.O. Box 30772, Nairobi
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Abstract

A large number of male and female tenerals and young non-teneral female G. pallidipes were attracted to the exterior of the trap but appeared not to enter the trap readily. About 20% of tenerals of both sexes that visited the trap were captured in the retaining cage and the remaining 80% on the outside. The sex ratio of flies stuck on the outside was 1:1 whereas that of flies from the retaining cage was 1:1.5 females:males. The efficiency of the trap for non-teneral G. pallidipes was about 39%. Direct observation using binoculars from a stationary vehicle about 10–15 m from the trap showed that the catching efficiency of the biconical trap was 30% for a total of the four categories of non-teneral females and males, and teneral females and males.

Résumé

Des femelles ténérales et jeunes femelles no-ténérales de G. pallidipes ont été attirées par la partie extérieure de piège mais n'apparaissait pas entrer promptement dans Ie piège. A peu près 20% de ténérales de 2 sexes qui visitaient le piège ont été capturés dans la cage de retention et les 80% restant à l'exterieur. Le rapport femelle/mâle des insectes coincés sur la partie extérieure était de 1:1, alors que celui des insectes capturés dans la cage de retention était de 1:1.5. L'efficacité de piège biconique s'est averée d'être environ 39% pour la capture de G. pallidipes non-ténérales. L'observation direct à partir d'un vehicule stationné à une distance d'à peu près 10–15 mètres utilisant les binoculaires a montré que l'efficacité de piége était de 30% pour 4 catégories de femelles non-ténérales, de mâales non-ténérales, de femelles ténérales et de mâles ténérales.

Keywords

Tsetsetrap-efficiencycatch-compositionage structuretrap-biasTsétséefficacité de piègecomposition de capturestructure d'âgepiège-prejugé
Type
Articles
Information
International Journal of Tropical Insect Science , Volume 10 , Issue 5 , October 1989 , pp. 651 - 659
Copyright
Copyright © ICIPE 1989

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References

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