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Generalist predators disrupt parasitoid aphid control by direct and coincidental intraguild predation
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Traugott, M., Bell, J. R., Raso, L., Sint, D. and Symondson, W. O. C. (William O. C.) (2012) Generalist predators disrupt parasitoid aphid control by direct and coincidental intraguild predation. Bulletin of Entomological Research, Volume 102 (Number 2). pp. 239-247. doi:10.1017/S0007485311000551 ISSN 0007-4853.
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Official URL: http://dx.doi.org/10.1017/S0007485311000551
Abstract
Generalist predators and parasitoids are considered to be important regulators of aphids. The former not only feed on these pests, but might also consume parasitoids at all stages of development. This direct or coincidental interference affects the natural control of aphids, the scale of which is largely unknown, and it has rarely been examined under natural conditions. Here, molecular diagnostics were used to track trophic interactions in an aphid-parasitoid-generalist predator community during the build-up of a cereal aphid population. We found that generalist predators, principally carabid and staphylinid beetles as well as linyphiid spiders, had strong trophic links to both parasitoids and aphids. Remarkably, more than 50% of the parasitoid DNA detected in predators stems from direct predation on adult parasitoids. The data also suggest that coincidental intraguild predation is common too. Generalist predators, hence, disrupt parasitoid aphid control, although the levels at which the predators feed on pests and parasitoids seem to vary significantly between predator taxa. Our results suggest that taxon-specific trophic interactions between natural enemies need to be considered to obtain a more complete understanding of the route to effective conservation biological control.
Item Type: | Journal Article | ||||
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Subjects: | Q Science > QL Zoology | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- ) > Warwick HRI (2004-2010) |
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Library of Congress Subject Headings (LCSH): | Aphids -- Predators of, Aphids -- Biological control, Predatory insects, Parasitoids | ||||
Journal or Publication Title: | Bulletin of Entomological Research | ||||
Publisher: | Cambridge University Press | ||||
ISSN: | 0007-4853 | ||||
Official Date: | April 2012 | ||||
Dates: |
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Volume: | Volume 102 | ||||
Number: | Number 2 | ||||
Page Range: | pp. 239-247 | ||||
DOI: | 10.1017/S0007485311000551 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 20 December 2015 | ||||
Date of first compliant Open Access: | 20 December 2015 | ||||
Funder: | European Commission (EC), Biotechnology and Biological Sciences Research Council (Great Britain) (BBSRC) | ||||
Grant number: | 515216 P-P INTERACTIONS (EC), 72/D19632 (BBSRC) |
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