Rising resistance to Bt crops: University of Arizona entomologists Bruce Tabashnik, Ph.D., and Yves Carrière, Ph.D., report that, worldwide, cases of field-evolved resistance to Bt crops severe enough to cause practical consequences for pest management surged from just four in 2006 to 19 by 2016. (Figure originally published in Tabashnik and Carrière 2019, Journal of Economic Entomology)