Impact de pommes de terre résistantes au doryphore sur les arthropodes non visés : une méta-analyse des facteurs possiblement e

• DOI: 10.1684/agr.2008.0213
• Publication Date: 2019-08-02T12:29:13Z
• Authors: Conrad Cloutier; Simon Boudreault; Dominique Michaud
• Keywords: Bacillus thuringiensis; Colorado potato beetle; Beneficial insects; Arthropod

The relatively high specificity of transgenic plants based on Cry toxins Bacillus thuringiensis (Bt) implies the possibility upward agroecosystemic cascades toward new equilibria among arthropods associating with cultivated plants. We examine hypothesis that exclusion Colorado potato beetle from expressing Cry3a toxin increases abundance non-target herbivores, which indirectly favours herbivore-dependent predators and omnivores foraging agricultural examined impact Bt arthropod taxa, studies conducted during development Newleaf® in North America. Of 32 field tests comparing to non-transgenic controls, 14 (42%) revealed a significant, positive effect sucking insects (aphids, leafhoppers, mirids, thrips). Among 72 generalist were simultaneously monitored, (~20%) also significant effects. Such effects can best be explained by their being increased as result greater productivity due overabundance insect prey, are selectively favoured toxin. Our results support idea may have been hampered part its pests, underline importance conserving natural enemies secondary pests favoured.