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."
- New calculator can help soybean farmers with seed decisions
- U.S., Brazil close to ending cotton trade rift
- U.S.-Japan trade talks hit new farm exports snag
- Ag markets posted a general comeback Wednesday
- Midwest grain growers ‘Invest an acre to feed the world’
- Ag markets turned mixed around midsession Wednesday
- Activists fighting Golden Rice even more in 2014
- U.S. GMO labeling foes triple spending in first half of this year
- Source shows half of GMO research is independent
- White House issues veto threat on bill to block WOTUS rule
- East-West Seed signs marketing collaboration with Monsanto
- How much corn can the ethanol industry use?