FEDERAL Agriculture Minister Tony Burke has told a United Nations meeting in Rome, that decisions on the future of genetically-modified crops must be based on science, not superstition. 

"Food safety decisions need to be based on science, not superstition," he told ABC Radio.

GM technology was part of a jigsaw dealing with climate change and in the global food crisis.

"At a time of world food shortage, it's very difficult to argue that we should turn our backs on answers that science can give us," Mr Burke said, adding the food safety question should be dealt with on a case-by-case basis and on merit.

If testing proved a particular GM product was not up to scratch, then it shouldn't be released, he said.

AAP