Bruce Tabashnik, University of Arizona (IMAGE) University of Arizona Caption Bruce Tabashnik, Regents' Professor and head of the University of Arizona's Department of Entomology, has studied evolution of pest resistance to Bt crops for the past two decades. Credit Alex Yelich/University of Arizona Usage Restrictions This visual may only be used in conjunction of reporting/posting of this news release. Credit must be stated as indicated. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.