1. Multi-toxin biotech crops not silver bullets, UA scientists warn
2. Potential shortfall of pyramided transgenic cotton for insect resistance management - study abstract
NOTE: Pest resistance to Bt toxin in single-trait Bt crops has led the GM industry to stack multiple types of Bt toxin in one crop, in an attempt to kill off the pests that have evolved resistance to one toxin. But new experiments suggest that the assumptions underlying this model are false and doomed to fail.