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Volatiles from damaged plants as major cues in long-range host-searching by the specialist parasitoid Cotesia rubecula

Geervliet, J.B.F. and Vet, L.E.M. and Dicke, M. (1994) Volatiles from damaged plants as major cues in long-range host-searching by the specialist parasitoid Cotesia rubecula. Entomologia Experimentalis et Applicata, 7, 289-297. ISSN 0013-8703.

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Official URL: http://dx.doi.org/10.1007/BF02382480

Abstract

The role of volatile stimuli in the long-range host-searching behaviour of the specialist parasitoidCotesia rubecula Marshall (Hymenoptera: Braconidae) was studied. Components from the plant-host-complex Brussels sprouts (Brassica oleracea L. var.gemmifera (DC.) Schulz. cv. ‘Titurel’)-Pieris rapae L. (Lepidoptera: Pieridae) were compared for their attractiveness in dual choice tests in a windtunnel. Stimuli from cabbage plants that were mechanically damaged or damaged byP. rapae caterpillars were more attractive to this parasitoid species than stimuli emitted by the host larvae or their faeces. Parasitoids preferred leaves from the plant-host-complex over artificially damaged leaves. Undamaged cabbage plants were the least attractive to the foraging females. These results indicate that in-flight searching behaviour ofC. rubecula is guided by plant-derived information and that for this specialist species more reliable and specific host-derived cues play a minor role at longer distances.

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:74
Deposited On:14 Mar 2012 01:00
Last Modified:17 Apr 2014 14:02

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