NDLI: Habitat selection of a parasitoid mediated by volatiles informing on host and intraguild predator densities

Content Provider	Springer Nature Link
Author	Cotes, Belén Rännbäck, Linda Marie Björkman, Maria rli, Hans Ragnar Meyling, Nicolai V. Rämert, Birgitta Anderson, Peter
Copyright Year	2015
Abstract	To locate and evaluate host patches before oviposition, parasitoids of herbivorous insects utilize plant volatiles and host-derived cues, but also evaluate predator-derived infochemicals to reduce predation risks. When foraging in host habitats infested with entomopathogenic fungi that can infect both a parasitoid and its host, parasitoids may reduce the risk of intraguild predation (IGP) by avoiding such patches. In this study, we examined whether the presence of the entomopathogenic fungi Metarhizium brunneum and Beauveria bassiana in soil habitats of a root herbivore, Delia radicum, affects the behavior of Trybliographa rapae, a parasitoid of D. radicum. Olfactometer bioassays revealed that T. rapae avoided fungal infested host habitats and that this was dependent on fungal species and density. In particular, the parasitoid avoided habitats with high densities of the more virulent fungus, M. brunneum. In addition, host density was found to be important for the attraction of T. rapae. Volatiles collected from host habitats revealed different compound profiles depending on fungal presence and density, which could explain the behavior of T. rapae. We conclude that T. rapae females may use volatile compounds to locate high densities of prey, but also compounds related to fungal presence to reduce the risk of IGP towards themselves and their offspring.
Starting Page	151
Ending Page	162
Page Count	12
File Format	PDF
ISSN	00298549
Journal	Oecologia
Volume Number	179
Issue Number	1
e-ISSN	14321939
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2015-05-07
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Delia radicum Entomopathogenic fungus Foraging decision Trade-off Trybliographa rapae Ecology Plant Sciences Hydrology/Water Resources
Content Type	Text
Resource Type	Article
Subject	Ecology, Evolution, Behavior and Systematics

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Habitat selection of a parasitoid mediated by volatiles informing on host and intraguild predator densities

Habitat selection of a parasitoid mediated by volatiles informing on host and intraguild predator densities

Male and female Trybliographa rapae (Hymenoptera: Figitidae) behavioural responses to food plant, infested host plant and combined volatiles

Effect of chemical treatment on Delia radicum and its parasitoids Aleochara bilineata and Trybliographa rapae

Impact of foliar herbivory on the development of a root-feeding insect and its parasitoid

Differences in Volatile Profiles of Turnip Plants Subjected to Single and Dual Herbivory Above- and Belowground

Aboveground herbivory affects indirect defences of brassicaceous plants against the root feeder Delia radicum Linnaeus: laboratory and field evidence

Flower attractiveness and nectar accessibility for Delia radicum (Diptera:Anthomyiidae) with implications for the control by Trybliographa rapae (Hymenoptera:Figitidae)

Differences in Volatile Profiles of Turnip Plants Subjected to Single and Dual Herbivory Above- and Belowground

Habitat selection of a parasitoid mediated by volatiles informing on host and intraguild predator densities

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Habitat selection of a parasitoid mediated by volatiles informing on host and intraguild predator densities