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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 356914
Title Foraging efficiency of a parasitoid of a leaf herbivore is influenced by root herbivory on neighbouring plants
Author(s) Soler, R.; Harvey, J.A.; Bezemer, T.M.
Source Functional Ecology 21 (2007)5. - ISSN 0269-8463 - p. 969 - 974.
Department(s) Laboratory of Entomology
Laboratory of Nematology
Publication type Refereed Article in a scientific journal
Publication year 2007
Keyword(s) tritrophic interaction webs - insect - persistence - community - quality
Abstract Root feeding insects can influence foliar quality of the host plant, which can affect the development and behaviour of leaf herbivores and parasitoids. Thus far, such interactions have been reported in situations where root and leaf associated organisms share a host-plant. We tested whether root herbivory influences searching behaviour of an above-ground parasitoid when the foliar feeding host of the parasitoid and the root herbivore are feeding on different plants. We manipulated the proportion of 25 plants (ranging from 0 to 1) exposed to root herbivory by Delia radicum (neighbouring-plants). Five additional plants were infested above-ground with Pieris brassicae larvae (host-infested plants) and were placed in-between the neighbouring plants. We then released females of the parasitoid Cotesia glomerata which attacks P. brassicae and studied foraging efficiency of the parasitoid. Overall, parasitoids located more host-infested plants during the maximum allowed searching time, and found their hosts about three times faster when neighbouring plants were exposed to root herbivory, than when neighbouring plants were not infested with D. radicum. Similar results were found when the host-infested plants were also exposed to root herbivory. Our results show that the interaction between an above-ground foliar feeding insect and its parasitoid can be influenced by the presence of non-host herbivores feeding on the roots of neighbouring conspecific plants.
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