A device, system, and method are disclosed whereby farm produce harvested at a particular time and location can be tracked throughout the food supply chain, from farm or orchard to consumer market. If farm produce in the market is found to be unhealthy, contaminated, or otherwise unsuited for human consumption, the system and method enables identification of the source of harvesting, and so identification of other produce which was harvested at substantially the same time and location. This enables improved identification and containment of any problems in the produce food supply chain.