The results fit with preliminary data from Obrycki's student Laura C. Hansen. Obrycki also questions the argument that Bt corn is a lesser evil than old pesticides. That may be true where farmers irrigate corn fields and create green paradises for pests. Iowans generally don't do that, he says, and only about 2 percent of the state's cornfields get sprayed for borers. Losey, J.E., L.S. Rayor, and M.E. Carter.
Transgenic pollen harms monarch larvae.
Pests find new ways around natural toxins. Perkins, S. 1997. Transgenic plants provoke petition . The Journey North Web site is dedicated to following the journeys of a dozen migratory species through observations by student groups throughout the Northern Hemisphere. This site is particularly notable for providing information on the weekly northern movement of monarch butterflies.