This project tested and promoted wild rice management methods on rice fields in southern Tanzania. Further series of field demonstrations were completed at 18 floodplain sites infested by the perennial wild rice Oryza longistaminata in four villages of Kilombero and Kyela districts of Tanzania. Pre-plant application of the herbicide Round Up (active ingredient glyphosate) and use of a basal fertiliser both significantly increased grain yield of the recently introduced aromatic rice cultivar TXD 306. Herbicide use achieved season-long suppression of wild rice. Use of glyphosate was also provided effective control of the annual O. punctata in both transplanted and direct dry-seeded rice. Participatory budgets developed with farmer groups indicated the use of both fertiliser and herbicide to be cost-effective. A training manual covering improved rice production practices, including management of wild rice, was produced and distributed to extension managers, extension officers and lead farmers. Training courses for farmers, extension officers and village leaders were held in four locations.