Genetically modified organisms (GMOs): 176 Bt maize expresses Bt toxin at sub-lethal concentrations

Home of Kyle J. Norton for The Better of Living & Living Health Health risk assessment of genetically modified organisms (GMOs) cultivated for food or feed is under debate throughout the world, and very little data have been published on mid- or long-term toxicological studies with mammals.
176 Bt maize expresses Bt toxin at sub-lethal concentrations
In the 6-year-field evaluation to assess potential hazards of growing Compa, a transgenic Bt maize variety based on the transformation event CG 00256-176, indicated that Larvae collected in Bt fields at later growth stages, in which event 176 Bt maize expresses Bt toxin at sub-lethal concentrations, had longer diapause and post-diapause development than larvae collected in non-Bt fields, a feature that might lead to a certain isolation between populations in both type of fields and accelerate Bt resistance evolution. Transgenic maize did not have a negative impact on non-target pests in the field; more aphids and leafhoppers but similar numbers of cutworms and wireworms were counted in Bt versus non-Bt fields; in any case differences in damage or yield were recorded. No difference in the numbers of the most relevant predators in fields containing transgenic or no transgenic maize(20).
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Sources
(20) http://www.ncbi.nlm.nih.gov/pubmed/16475005 http://medicaladvisorjournals.blogspot.com