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Rearing and Field Release Methods for Cotesia Flavipes Cameron (Hymenoptera: Braconidae), a Parasitoid of Tropical Gramineous Stem Borers

Published online by Cambridge University Press:  19 September 2011

W. A. Overholt ,
J. O. Ochieng ,
P. Lammers  and
K. Ogedah
W. A. Overholt
Affiliation:
International Centre of Insect Physiology and Ecology P. O. Box 30772, Nairobi, Kenya
J. O. Ochieng
Affiliation:
International Centre of Insect Physiology and Ecology P. O. Box 30772, Nairobi, Kenya
P. Lammers
Affiliation:
International Centre of Insect Physiology and Ecology P. O. Box 30772, Nairobi, Kenya
K. Ogedah
Affiliation:
International Centre of Insect Physiology and Ecology P. O. Box 30772, Nairobi, Kenya
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Abstract

Hand-stinging and mass exposure methods of rearing the parasitoid Cotesia flavipes Cameron (Hymenoptera:Braconidae) on the stem borer host, Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae), were compared. The proportion of hosts successfully parasitised, progeny production, proportion of female progeny, and host mortality did not differ between the two methods. However, there was evidence of superparasitism of mass-exposed hosts. Releases of C. flavipes as adults and as cocoons were both effective methods for field colonisation of the parasitoid. A device for the release of C. flavipes in the cocoon stage is described.

Résumé

La comparaison de deux méthodes d'élevage du parasitoid Cotesia flavipes Cameron (Hymenoptera: Braconidae) comprenant l'exposition en masse ou individuelle de l'hôte Chilo partellus (Swinhoe) (Lepidoptera: Pyralidae) a montré que le pourcentage des hôtes éffectivement parasités, la progéniture, et le pourcentage de femelles obtenus n'ont pas été differents dans les deux méthodes. Toutefois, il y a une évidence de superparasitisme dans la méthode d'exposition en masse. Les lâchés de C. flavipes sous forme d'adultes ou de cocons ont été toutes deux efficaces dans la colonisation en champ du parasitoid. Un appareil de lâthé de cocons de ce parasitoid est décrit.

Keywords

Cotesia flavipesChilo partellusrearingrelease methodsstem borerCotesia flavipesChilo partellusélevageméthodes de liberationforeur des tiges
Type
Research Articles
Information
International Journal of Tropical Insect Science , Volume 15 , Issue 3 , June 1994 , pp. 253 - 259
Copyright
Copyright © ICIPE 1994

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