French farmers will no longer be able to plant seeds from the maize line MON 810, as of Saturday 15 March. A new decree plans to stop Monsanto maize from being grown as a measure of precaution.
Fresh scientifc evidence has revealed that the planting of genetically modified maize from the US agro-chemical giant could pose serious risks to the environment.
French authorities have been trying to establish a new ban on GM corn after a senior court twice struck down previous attempts.
Saturday's decree was timed to avert any sowing of GM maize by farmers before a law banning planting of GMOs is debated at the National Assembly in April.
Environmentalists have welcomed the move, but remain prudent. They want a long-term legal frame work banning GM maize crops, not a stop-gap measure.
Currently, the MON 810 insect-resistant maize is the only GMO variety authorized in the European Union.