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Jeffrey S. Davey, Ian P. Vaughan, R. Andrew King, James R. Bell, David A. Bohan, Michael W. Bruford, John M. Holland and William O. C. Symondson Intraguild predation in winter wheat: prey choice by a common epigeal carabid consuming spiders Journal of Applied Ecology 50

Article first published online: 4 DEC 2012 | DOI: 10.1111/1365-2664.12008

High levels of intraguild predation were revealed using molecular diagnostics. The gut analysis approach provided invaluable data that will inform the future design of appropriate pest management and integrated farming strategies that encourage these predators. The data showed strong evidence of prey choice. Managers can, however, probably encourage high densities of all these known aphid predators (spiders and carabids) because disproportionately high rates of predation on the most common spiders at our field sites (T. tenuis) were not sufficient to prevent strong growth in the density of this species between June and August (adults increased × 1·6 and juveniles × 8·6). Such work is essential if we are to reveal the processes behind functional biodiversity in crops.

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