Yolo County Launches Track And Trace Program To Locate Sources Of Medical Marijuana Monday, February 27, 2017 | Sacramento, CA Listen / download audio Update RequiredTo play audio, update browser or Flash plugin. Katheirne Hitt / Flickr How do medical marijuana patients know where their medicine is coming from? In an effort to cut down on the illicit market and create greater transparency, Yolo County is teaming with the company SICPA to develop a pilot program to track and trace pot. The program would create unique identification stamps for each plant of marijuana pot grown that can be tracked through the supply chain to the dispensary where it’s eventually purchased. It comes after a six-month pilot program from the same company wraps up in Yolo County. Yolo County Agricultural Commissioner Dennis Chambers and SICPA product manager Julien Zanchi discuss what they’re hoping to achieve from the pilot project and some of their concerns.