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."
- Be mindful of bees during delayed planting this season
- Adjusting corn management practices for a late start
- Black cutworm spring arrival has hostile welcome
- Reniform nematode continues to plague the Mid-South
- Japan has not narrowed trade differences with U.S.
- USDA awards grants to address impact of climate change on ag
- Commentary: Blame anti-GMO groups for deaths
- Julie Borlaug says biotech is necessary in fight against hunger
- What does “sustainable” food and agriculture really mean?
- Ohio bill to require certification to apply fertilizer
- Carbon-dioxide hurts nitrogen assimilation by plants
- DuPont calls on Congress to preserve RFS