Mexico added another six pilot-stage approvals for planting of genetically modified maize at the end of May. The latest were approved on May 30th-31st, and have been added to the Mexican food quality and health service, the Senasica, register. Three were granted to Monsanto, two to DuPont seed subsidiary Pioneer Hi-Bred International (now DuPont Pioneer), and the other to Dow AgroSciences. That brings the number of approvals this year to 14, after the first batch came in March ( Agrow No 638, p 23). Pilot planting is an intermediate stage between field trials and full commercialisation, typically on a larger scale than field trials.