Across Latin America, supermarket chains partly or wholly owned by global corporate goliaths like Ahold, Wal-Mart and Carrefour...have...begun to transform food growing...their sudden appearance has brought unanticipated and daunting challenges to millions of struggling, small farmers. [also refers to Stop & Shop (part of Ahold), La Fragua (part of Central American Retail), Maxi Bodega (part of Central American Retail), C.S.U. (now part of Central American Retail), Aj Ticonel, Asumpal]