Rice Terraces in Sapa in Vietnam (IMAGE) Heinrich-Heine University Duesseldorf Caption Rice terraces in Sapa, Vietnam: Rice is the world's most important food plant, playing a vital role for nutrition in Asia and Africa in particular. In those countries, rice is generally grown by small farmers. If their fields are infected by bacterial blight, their very existence is threatened. Credit HHU / Sarah M. Schmidt Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.