Should EPA double the percent of corn refuges?
Tabashnik pointed to a case in Puerto Rico, where adequate refuges were not planted. Within a few years, the pests evolved resistance and devoured the Bt corn plants. The biotechnology companies voluntary stopped selling Bt corn seed there, but five years later, the insects remain resistant to the toxin.
Although biotech companies recently starting selling some varieties of Bt corn that produce combinations of Bt toxins, Tabashnik said, the resistance to one toxin still raises concerns.
"You can think of the multi-Bt toxin approach as a pyramid: The base has to be stable. If one of your building blocks, which is susceptibility to Cry3Bb1, is crumbling, you have a problem. Resistance to any one toxin jeopardizes the effectiveness of the whole system."
"We're at a tipping point where decisive action can provide long-term benefits and avoid loss of an environmentally friendly tool for pest control."
- Scout for aphids in winter wheat
- El Niño development stalled out, but wet winter still predicted
- Ag markets posted divergent closes Wednesday
- Farm bill program to help farmers affected by severe weather
- Israel panel proposes 25-42% tax hike on mining companies
- Ag markets moved almost unanimously higher Wednesday morning
- How much corn can the ethanol industry use?
- Economist: Taxing P could reduce risk of algal blooms
- Commentary: Government wants farmers to quit farming
- Source shows half of GMO research is independent
- Ag markets made a generally mixed showing Thursday night
- What is the relationship between maturity group, yield?