Reuters: France is to maintain a temporary ban on the cultivation of genetically modified crops, Prime Minister Jean-Marc Ayrault said on Saturday, dealing a blow to farmers and seed companies who say the move is unjustified and economically harmful. The ban, which targets Monsanto’s MON810 maize, the only genetically modified organism (GMO) currently allowed in Europe, was introduced in March after a previous moratorium was annulled by France’s top court last November. “The government is keeping its moratorium…