By Jack Kaskey – Nov 16, 2012
Fall armyworms in southern Florida survived a pesticide engineered into corn by Dow Chemical Co. (DOW) and DuPont Co., the second insect to show signs of resistance to genetically modified crops in the U.S., according to a study.
Fall armyworms ate the leaves of corn engineered to produce an insecticidal protein and lived, according to 2012 field trial data presented Nov. 13 at a conference in Knoxville, Tennessee. The protein is marketed by Dow and DuPont as Herculex.
“This is most likely field resistance,” Fangneng Huang, an assistant professor at Louisiana State University in Baton Rouge, said at the annual meeting of the Entomological Society of America.
The study follows last year’s discovery in Iowa that rootworms have developed resistance to Monsanto Co. (MON)’s corn. Concern that the insecticides are failing is prompting farmers to apply more chemicals, unwinding the primary environmental benefit of pest-fighting crops, Michael Gray, an entomologist at the University of Illinois in Urbana, said in a Nov. 14 presentation at the conference. Read full story here.