1938 : the company takes the name of LEMAIRE DEFFONTAINES
In 1920, the seed producers of the North of France apply the discoveries of Louis de VILMORIN and start the breeding of cereals varieties.
Louis LEMAIRE, elder son of Ferdinand, creates "Louis LEMAIRE et fils" company. On his death, in 1938, the company takes the name of LEMAIRE DEFFONTAINES after the marriage of his son Jean LEMAIRE to Agnès DEFFONTAINES, from the "Ferme du Hem" at Auchy-lez-Orchies.
At this time, the varieties of wheat marketed are listing in France by SOGROUP, an union of cereal breeders from the North of France..