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 495593
Title Flexible parasitoid behaviour overcomes constraint resulting from position of host and nonhost herbivores
Author(s) Rijk, Marjolein de; Krijn, Margriet; Jenniskens, Willeke; Engel, Bas; Dicke, Marcel; Poelman, E.H.
Source Animal Behaviour 113 (2016). - ISSN 0003-3472 - p. 125 - 135.
Department(s) Laboratory of Entomology
Biometris (WU MAT)
Publication type Refereed Article in a scientific journal
Publication year 2016
Keyword(s) Foraging efficiency - Herbivore position - Multiherbivory - Nonhost - Parasitoid behaviour - Semifield experiment - 016-3915

Parasitoids face several hurdles and distractions while foraging for their hosts, one of which is the presence of nonhost herbivores. Nonhost herbivores may interfere with plant volatile-mediated location of host-infested plants and reduce encounter rates with hosts on the plant. This results in a lower foraging efficiency. In this study, we tested whether the feeding position of a host and nonhost herbivore on the same plant influences foraging decisions and parasitism efficiency of parasitoids. We confined host and nonhost herbivores to either higher positions, i.e. younger leaves (preferred by the host) or lower positions on the plant, i.e. older leaves (preferred by the nonhost). Host and nonhost herbivores fed either on separate leaves or on the same leaf. Results from laboratory experiments show that during the first phase of foraging when plant volatiles are used to locate a host-infested plant, parasitoids were misled when host and nonhost were positioned in an unnatural way on the individual plant (host on the older leaves). The positions of host and nonhost partly influenced parasitoids during the second phase of foraging, when the host is located on the plant by using host cues. Total host-finding efficiency, as tested in a semifield set-up, was not affected by herbivore position. We conclude that parasitoid foraging behaviour has enough flexibility to overcome constraints resulting from an unexpected distribution of herbivores over a plant.

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