EU member states will be urged to tighten their controls over the sale of illegally irradiated food in a new report from the European Commission expected at the end of September.
The report claims that tests from 2004 showed nearly 4% of the food on sale in the EU had been irradiated but was not labelled as such, in breach of European rules.
Products sourced from Asia are the most likely to be affected, the draft report suggests.
Brussels will also criticise several member states for the poor quality of their control systems, with new members Cyprus, Estonia, Lithuania, Malta and Slovenia failing to carry out any tests.