Lookup NU author(s): Dr Rachel Down,
Professor Angharad MR Gatehouse
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Aphid parasitoids are important biological control agents. The possibility arises that whilst foraging on insect-resistant transgenic plants, they are themselves at risk from direct and indirect effects of the expression of a transgene used to control the pest species. A liquid artificial diet was successfully used to deliver the snowdrop lectin (Galanthus nivalis agglutinin; GNA) to the peach-potato aphid, Myzus persicae. Bioassays utilising artificial diet incorporating GNA, and excised leaves of the GNA-expressing transgenic potato line, GNA 2#28, were performed to assess the potential effects of GNA on the development of the aphid parasitoid Aphidius ervi. The results indicate that GNA delivered via artificial diet to the aphids can be transferred through the trophic levels and has a dose-dependent effect on parasitoid development. Parasitoid larvae excreted most of the ingested GNA in the meconium but some of it was detected in the pupae. Although A. ervi development was not affected when developing within hosts feeding on transgenic potato leaves, this probably reflected sub-optimal expression of the toxin in the transgenic potato line used © 2001 Elsevier Science Ltd. All rights reserved.
Author(s): Down RE; Gatehouse AMR; Couty A; Kaiser L; Pham-Delegue M-H; Poppy GM
Publication type: Article
Publication status: Published
Journal: Journal of Insect Physiology
ISSN (print): 0022-1910
ISSN (electronic): 1879-1611
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