paris france thursday announce plan raise regulate minimum food price limit bargain sales supermarkets part wide field-to-fork plan aim increase farmers income government official say measure part wide review promise president emmanuel macron appease farmers important constituency french politics long complain hit squeeze margins retail price war october macron say government would raise minimum price retailers charge food products sector propose detail organization plan end year plan arrive late last week official say government propose threshold retailers sell food products rise 10 percent price promotional offer could discount 34 percent 25 percent product volume could sell promotional offer official say line proposal report daily le figaro new rule aim limit sales losses pressure suppliers chain would apply trial period two years macron delay year-end proposal retailers raise regulate minimum price seek guarantee would meet promise boost farm income minimize retail inflation measure include new law set approve first half next year also tackle price renegotiation case wide swing commodity price create reverse contract start farmers production cost food processors retailers company industry representatives unions non-governmental organizations officials gather so-called food convention since summer discuss topics range food quality farm income export strategy france raise minimum food price limit bargain sales