In 1997, 4 million hectares were planted with crops genetically engineered to produce toxins derived from the bacterium Bacillus thuringiensis (Bt). By 2011, the global area planted to Bt crops covered over 66 million hectares. During this time, maize and cotton covered the majority of the world’s agricultural landscape devoted to Bt crops. Benefits of Bt crops include effective control of certain key insect pests and reduced use of conventional insecticides... There are many unquestionable successes in the application of Bt crops
to manage pests and in their companion IRM programs to delay resistance. However, the challenge of pest resistance will be present as long as Bt crops are grown. To meet this challenge, there will need to be continued proactive research on interactions among pests and Bt crops, and continued discussions on how to best apply Bt crops for sustainable pest management and IRM.