Welcome to www.siac.pro SIAC Société Industrielle et Agricole du Pays de Caux Founded in 1964. Developer of new potato varieties: Louisana , Esmeralda and Nazca Siac also produces seed potatoes for export: DESIREE and SPUNTA for Egypt, Algeria, Tunisia, Morocco, Saudi Arabia, Israel, Lebanon, Libia, Spain, Italy, Portugal and Greece.