By Carey Gillam  New research adds to evidence that the effectiveness of popular genetically engineered traits used to protect corn and cotton from insects is failing, putting U.S. corn production potential in jeopardy, and spurring a need for increased insecticide use. The study,  authored by a trio of independent researchers, documents resistance in a major … New Research: GMO Insect Resistance Failing; Corn Crop in Jeopardy