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Combined use of herbivore-induced plant volatiles and sex pheromones for mate location in braconid parasitoids

Xu, Hao; Desurmont, Gaylord; Degen, Thomas; Zhou, Guoxin; Laplanche, Diane; Luka, Henryk and Turlings, Ted C.J. (2017) Combined use of herbivore-induced plant volatiles and sex pheromones for mate location in braconid parasitoids. Plant, Cell and Environment, 40 (3), pp. 330-339.

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Document available online at: https://onlinelibrary.wiley.com/doi/abs/10.1111/pce.12818


Summary

Herbivore-induced plant volatiles (HIPVs) are important cues for female parasitic wasps to find hosts. Here, we investigated the possibility that HIPVs may also serve parasitoids as cues to locate mates. To test this, the odour preferences of four braconid wasps – the gregarious parasitoid Cotesia glomerata (L.) and the solitary parasitoids Cotesia marginiventris (Cresson), Microplitis rufiventris Kokujev and Microplitis mediator (Haliday) - were studied in olfactometers. Each species showed attraction to pheromones but in somewhat different ways. Males of the two Cotesia species were attracted to virgin females, whereas females of M. rufiventriswere attracted to virginmales.
Male and female M.mediator exhibited attraction to both sexes. Importantly, female and male wasps of all four species were strongly attracted by HIPVs, independent of mating status. In most cases, male wasps were also attracted to intact plants. The wasps preferred the combination of HIPVs and pheromones over plant odours alone, except M.mediator, which appears to mainly use HIPVs for mate location.We discuss the ecological contexts in which the combined use of pheromones and HIPVs by parasitoids can be expected. To our knowledge, this is the first study to show that braconid parasitoids use HIPVs and pheromones in combination to locate mates.


EPrint Type:Journal paper
Keywords:caterpillar-induced plant volatiles, leaf volatiles, mate-finding strategy, plant-insect interactions, tritrophic interactions, Agroecology, Plant protection
Agrovoc keywords:
Language
Value
URI
English
plants
http://aims.fao.org/aos/agrovoc/c_5993
Subjects: Environmental aspects > Biodiversity and ecosystem services
Crop husbandry > Crop health, quality, protection
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Crop protection
DOI:10.1111/pce.12818
Deposited By: Luka, Dr. Henryk
ID Code:34502
Deposited On:14 Feb 2019 10:14
Last Modified:27 Oct 2021 09:57
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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