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release methods

International Journal of Tropical Insect Science (1)

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Rearing and Field Release Methods for Cotesia Flavipes Cameron (Hymenoptera: Braconidae), a Parasitoid of Tropical Gramineous Stem Borers
W. A. Overholt, J. O. Ochieng, P. Lammers, K. Ogedah
Journal:

Insect Science and Its Application / Volume 15 / Issue 3 / June 1994

Published online by Cambridge University Press:

19 September 2011, pp. 253-259

Print publication:

June 1994
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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.