A Meta-Analysis of Effects of Bt Cotton and Maize on Nontarget Invertebrates

@article{Marvier2007AMO,
  title={A Meta-Analysis of Effects of Bt Cotton and Maize on Nontarget Invertebrates},
  author={Michelle A. Marvier and Chanel McCreedy and James Regetz and Peter Kareiva},
  journal={Science},
  year={2007},
  volume={316},
  pages={1475 - 1477}
}
Although scores of experiments have examined the ecological consequences of transgenic Bacillus thuringiensis (Bt) crops, debates continue regarding the nontarget impacts of this technology. Quantitative reviews of existing studies are crucial for better gauging risks and improving future risk assessments. To encourage evidence-based risk analyses, we constructed a searchable database for nontarget effects of Bt crops. A meta-analysis of 42 field experiments indicates that nontarget… 
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A body of evidence and the quantitative and qualitative syntheses of the data through meta-analysis and other compilations generally indicate a lack of direct impacts of Bt crops on non-target macro-invertebrates, and data clearly show that BT crops are much safer to non- target organisms than the alternative use of traditional insecticides.
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