Host-plant mediated effects of transgenic maize on the insect parasitoid campoletis sonorensis (hymenoptera : ichneumonidae)

Sanders, Christopher.J., Pell, Judith.K., Poppy, Guy.M., Raybould, Alan, Garcia-Alonso, Monica and Schuler, Tanja.H. (2007) Host-plant mediated effects of transgenic maize on the insect parasitoid campoletis sonorensis (hymenoptera : ichneumonidae). Biological Control, 40, (3), 362-369. (doi:10.1016/j.biocontrol.2006.12.010).


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Determining the impact of genetically modified (GM) crops on beneficial organisms is an important aspect of the environmental risk assessment of GM crops. In the present study, the impact of Bt maize expressing Cry1Ab on the development and behaviour of the parasitoid Campoletis sonorensis was compared to individuals reared on hosts fed conventionally bred plants partially resistant to the European corn borer (Ostrinia nubilalis Hübner) and on susceptible maize hybrids. Adult parasitoids reared on Bt maize-fed Spodoptera frugiperda larvae were significantly smaller (15–30%) than those reared in hosts fed either of the conventional maize hybrids. The magnitude of this effect was dependent on the size of the host at oviposition and its subsequent growth rate. The development time of C. sonorensis was not affected by the maize treatment. In choice tests, female parasitoids displayed no preference for hosts fed a specific maize hybrid. No Cry1Ab was detected within adult parasitoids.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1016/j.biocontrol.2006.12.010
ISSNs: 1049-9644 (print)
Related URLs:
Keywords: Parasitoid, host-mediated, Cry1Ab, non-target organism, bacillus thuringiensis, Bt maize, sublethal effects, maize, host-plant resistance, risk assessment, biosafety, tritrophic interactions
Subjects: Q Science > QH Natural history > QH301 Biology
Divisions : University Structure - Pre August 2011 > School of Biological Sciences
ePrint ID: 56526
Accepted Date and Publication Date:
March 2007Published
Date Deposited: 07 Aug 2008
Last Modified: 31 Mar 2016 12:37

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