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Super-predation and intraguild interactions in a multi-predator-one-prey system alter the abundance and behaviour of green peach aphid (Hemiptera: Aphididae)

Published online by Cambridge University Press:  13 March 2020

Mouhammad Shadi Khudr Open the ORCID record for Mouhammad Shadi Khudr [Opens in a new window] ,
Lea Fliegner ,
Oksana Y. Buzhdygan  and
Susanne Wurst
Mouhammad Shadi Khudr*
Affiliation:
Faculty of Biology, Medicine and Health, The University of Manchester, Michael Smith Building, M13 9PT, Manchester, United Kingdom
Lea Fliegner
Affiliation:
Institute of Biology, Freie Universität Berlin, Altensteinstraße 34, 14195Berlin, Germany
Oksana Y. Buzhdygan
Affiliation:
Institute of Biology, Freie Universität Berlin, Altensteinstraße 34, 14195Berlin, Germany Department of Ecology and Biomonitoring, Chernivtsi National University, 58012Chernivtsi, Ukraine
Susanne Wurst
Affiliation:
Institute of Biology, Freie Universität Berlin, Altensteinstraße 34, 14195Berlin, Germany
*
*Corresponding author. Email: ms.khudr@manchester.ac.uk
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Abstract

The dynamics of interactions amongst natural enemies are central to the investigation of insect pest ecology. Ternary and quaternary interactions between parasitoids and predators in the presence of entomophagous organisms are yet to be comprehensively explored. We investigated the performance of a clone of green peach aphid (Myzus persicae (Sulzer); Hemiptera: Aphididae), raised on savoy cabbage (Brassica oleracea Linnaeus; Brassicaceae), under all possible combinations of: I) the parasitoid Aphidius colemani Viereck (Hymenoptera: Braconidae); II) the predator Chrysoperla carnea (Stephens) (Neuroptera: Chrysopidae); III) the predator Adalia bipunctata (Linnaeus) (Coleoptera: Coccinellidae); and IV) the spider Parasteatoda tepidariorum (Koch) (Araneae: Theridiidae). We demonstrate a considerably differential green peach aphid abundance, polyphenism, and fine-scale spatial distribution in response to the combination, number, and identity of the present enemy species and their interactions. Surprisingly, certain combinations led to thriving green peach aphid populations due to interference between enemies; whereas, other combinations resulted in tangible collective suppression of the population. At the frontier of agroecology and entomology, we provide fresh insights on the effects of conflict and synergy between natural enemies sharing a pest of a cash crop as prey, highlighting the consequences of the presence of a novel synanthropic spider, as a top predator, on pest regulation.

Type
Research Papers
Information
The Canadian Entomologist , Volume 152 , Issue 2 , April 2020 , pp. 200 - 223
Copyright
© 2020 Entomological Society of Canada

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Footnotes

Subject editor: Christopher Cutler

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