The GSPP Good Seed and Plant Practice organisation develops and manages a chain system designed to prevent tomato seed and plant lots from being infected by Clavibacter michiganensis subsp. michiganensis (Cmm). Plantum is an initiator of the system together with Union Françaises de Semenciers (UFS) and Syndicat Francis des Prodcuteur de Plants pour Professionels (SF3P). For more information, see the website of GSPP.