Politicians for the European Union have defeated a proposal from their executive Commission to allow countries to opt out of the Europe-wide approvals for genetically-modified crops.
They voted by an overwhelming majority to defeat the proposal, saying that allowing countries to opt out would result in a return to border controls to keep GMO produce out of some countries.
The environment spokesman for the assembly's biggest political group, Peter Liese, said that "we need to avoid chaos for consumers and farmers."
He warned that "having national bans would mean re-introducing border controls for foodstuff and feedstuff."
The use of GMOs remains controversial in Europe. Fifty-eight such crops have been authorized for consumption, including maize, cotton, soybean, oilseed rape and sugar beet. A further 58 are awaiting approval.
The lawmakers called on the EU's executive Commission to come up with new reforms to address problems posed by nations who oppose certain GMOs.
The Commission said it was disappointed by the vote and that it stands by its proposal.
Environmental group Greenpeace welcomed the decision, saying in a statement that the "plan would have failed to provide additional protection of European citizens and the environment from the risks posed by GM crops."