One out of every four farmers who plants genetically engineered (GE) corn is failing to comply with at least one important insect-resistance management requirement. That increases the likelihood that pesticide-resistant bugs will threaten the future of biotech crops and some of their non-biotech neighbors. That finding comes in a report released today by the Center for Science in the Public Interest, which is calling on the Environmental Protection Agency to not renew registrations of the GE corn varieties unless compliance rates improve.
In 2008, 57 percent of the corn acreage in the United States was planted with corn spliced with genes from the Bacillus thuringiensis bacterium, or Bt. Those crops produce natural toxins that are harmless to humans but will kill corn rootworms and corn borers, which otherwise reduce crop yields. Farmers who plant such crops are supposed to plant a refuge of conventional corn in, adjacent to, or near the GE crop. That refuge is designed to reduce the risk that pests that survive the toxin will breed with each other and produce resistant offspring. Resistant offspring would not only reduce yields of the Bt crops, but could also threaten organic or conventional farmers who use natural Bt-based pesticides on non-GE crops. Full Report