Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 497522
Title Volatile-mediated foraging behaviour of three parasitoid species under conditions of dual insect herbivore attack
Author(s) Ponzio, Camille; Cascone, Pasquale; Cusumano, Antonino; Weldegergis, Berhane T.; Fatouros, Nina E.; Guerrieri, Emilio; Dicke, Marcel; Gols, Rieta
Source Animal Behaviour 111 (2016). - ISSN 0003-3472 - p. 197 - 206.
DOI http://dx.doi.org/10.1016/j.anbehav.2015.10.024
Department(s) Laboratory of Entomology
EPS
Biosystematics
PE&RC
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Herbivore-induced plant volatiles - Indirect defence - Multiple attack - Multitrophic interactions - Oviposition-induced plant volatiles - 016-3906
Abstract

Infochemicals play an important role in structuring intra- and interspecific interactions. Many parasitoid wasp species rely on herbivory or oviposition-induced plant volatiles (HIPVs/OIPVs) to locate their herbivorous hosts, and must cope with variation in the volatile blends due to factors such as plant/host species, herbivore density or attack by several herbivores. However, little is known about how dual herbivory or changes in herbivore density affect multiple parasitoid species, each attacking a different herbivore, in the same system. In a natural system, we investigated the effect of dual attack on the ability of three parasitoid species to differentiate between volatiles induced by hosts and those induced by a combination of hosts and nonhosts. Black mustard, Brassica nigra, plants were infested with eggs or caterpillars of Pieris brassicae, alone or in combination with different densities of Brevicoryne brassicae aphids. We determined the ability of three different parasitoid species that parasitize either P. brassicae eggs (Trichogramma brassicae), caterpillars (Cotesia glomerata) or B. brassicae aphids (Diaeretiella rapae) to discriminate between the induced volatiles, and analysed the plant volatile blends. Dual infestation did not affect the parasitoid species equally and aphid infestation altered, in a density-dependent manner, the volatile-mediated foraging of all three parasitoid species. Chemical analyses of the volatile blends revealed nonlinear emission patterns in relation to aphid density in both plants attacked by aphids alone and in plants attacked by a combination of aphids and caterpillars. Simple correlations between behaviour and volatile emissions in pairwise comparisons suggest the importance of certain volatiles explaining attraction, whereas dose-response type analyses reveal that these simple correlation analyses provide an incomplete picture.

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