Intraguild predation by Harmonia axyridis (Coleoptera: Coccinellidae) on native insects in Europe: molecular detection from field samples

Brown, Peter M. J. and Ingels, Brecht and Wheatley, Angela and Rhule, Emma L. and de Clercq, Patrick and van Leeuwen, Thomas and Thomas, Alison (2015) Intraguild predation by Harmonia axyridis (Coleoptera: Coccinellidae) on native insects in Europe: molecular detection from field samples. Entomological Science, 18 (1). pp. 130-133. ISSN 1479-8298

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Official URL: https://doi.org/10.1111/ens.12092

Abstract

Intraguild predation (IGP) is a potential mechanism of negative effects on native species populations by invasive non‐native species such as Harmonia axyridis. Molecular techniques (polymerase chain reaction) were used to probe for the presence of various insect (coccinellid, syrphid and chrysopid) prey DNA in the guts of 177 H. axyridis larvae field‐collected in England, France, Germany, Slovakia and the Czech Republic in 2010. Three of the four target prey species were detected in the guts of H. axyridis at the following rates: Adalia decempunctata 9.6%, Adalia bipunctata 2.8% and Episyrphus balteatus 2.8%. IGP on Chrysoperla carnea was not detected. IGP detection of at least one target species was made in England, France, Slovakia and the Czech Republic, but not in Germany. These results strengthen the evidence that H. axyridis is a very generalist predator. Results are discussed in the context of their ecological significance.

Item Type: Journal Article
Keywords: Adalia bipunctata, Adalia decempunctata, Chrysoperla carnea, Episyrphus balteatus, harlequin ladybird, invasive species, PCR
Faculty: Faculty of Science & Technology
Depositing User: Lisa Blanshard
Date Deposited: 29 Nov 2018 11:41
Last Modified: 29 Nov 2018 11:41
URI: http://arro.anglia.ac.uk/id/eprint/703898

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