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Fitness consequences of superparasitism and mechanism of host discrimination in the stemborer parasitoid Cotesia flavipes

Potting, R.P.J. and Snellen, H. and Vet, L.E.M. (1997) Fitness consequences of superparasitism and mechanism of host discrimination in the stemborer parasitoid Cotesia flavipes. Entomologia Experimentalis et Applicata, 82(3), 341-348. ISSN 0013-8703.

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Official URL: http://dx.doi.org/10.1046/j.1570-7458.1997.00148.x

Abstract

The fitness consequences of superparasitism and the mechanism of host discrimination in Cotesia flavipes, a larval parasitoid of concealed stemborer larvae was investigated. Naive females readily superparasitized and treated the already parasitized host as an unparasitized host by allocating the same amount of eggs as in an unparasitized host. However, there was no significant increase in the number of emerging parasitoids from superparasitized hosts due to substantial mortality of parasitoid offspring in superparasitized hosts. Furthermore, the developmental time of the parasitoids in a superparasitized host was significantly longer than in a singly parasitized host and the emerging progeny were significantly smaller (body length and head width). Naive females entered a tunnel in which the host was parasitized 4 h previously and accepted it for oviposition. Experienced females (oviposition experience in unparasitized host) refused to enter a tunnel with a host parasitized by herself or by another female. In experiments where the tunnel and/or host was manipulated it was demonstrated that the female leaves a mark in the tunnel when she parasitizes a host. The role of patch marking in C. flavipes is discussed in relation to the ecology of the parasitoid.

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:85
Deposited On:14 Mar 2012 01:00
Last Modified:17 Apr 2014 14:05

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