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The role of the plant in host acceptance by the parasitoid Aphidius rhopalosiphi (Hymenoptera: Braconidae)

Published online by Cambridge University Press:  10 July 2009

H. Braimah  and
H. F. van Emden
H. Braimah*
Affiliation:
Department of Pure and Applied Zoology, University of Reading, UK
H. F. van Emden
Affiliation:
Department of Horticulture, University of Reading, UK
*
H.F. van Emden, Department of Horticulture, School of Plant Sciences, University of Reading, Whiteknights, P.O. Box 221, Reading RG6 2AS, UK.
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Abstract

Female Aphidius rhopalosiphi De Stefani Perez reared on Rhopalosiphum padi (Linnaeus) made equal numbers of encounters with another suitable host aphid (Sitobion avenae (Fabricius (both Homoptera: Aphididae))) in arenas where the aphids were on either pieces of wheat leaf or moist filter paper. However, the number of oviposition stabs made in arenas with wheat was far higher than with filter paper, demonstrating the importance of host-plant cues in the acceptance of the aphids by the parasitoid. Diet reared aphids (even if subsequently fed on wheat) appeared to be accepted more readily than totally wheat reared individuals. In another arena experiment, there were more encounters with and more stabs made into both S. avenae and a non-host aphid (Myzus persicae (Sulzer)) on wheat than on Brussels sprouts (a host plant of M. persicae), again showing the over-riding importance of host-plant cues.

Type
Original Articles
Information
Bulletin of Entomological Research , Volume 84 , Issue 3 , September 1994 , pp. 303 - 306
Copyright
Copyright © Cambridge University Press 1994

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