The Bt pollen hazard to monarch butterflies in the laboratory does not translate into risk in nature. The Bt -monarch situation was also carefully evaluated by the EPA in a detailed summary of data on the risks and benefits of Bt products. This summary was prepared in anticipation of the agency. Bacillus thuringiensis . Losey, J.O., L. Raynor and M.Carter.
Transgenic pollen harms monarch larvae.
MacIntosh, Stone, Sims, Hunst, Greenplate, Marrone, Perlak, Fischhoff and Fuchs. McClintock, J.T., C.R. Schaffer and R.D. Sjoblad. A comparative review of the mammalian toxicity of Bacillus thuringiensis -based pesticides. Orr and Landis. Palm et al. 1994.