Yams Benefit From Banana 'Paper' Cocoon (IMAGE) North Carolina State University Caption Field trials in Benin showed yam seeds wrapped in banana paper - with and without small amounts of a pesticide - resulted in larger yams and larger yam yields. Credit Photo courtesy of Elodie Coffi, University of Abomey-Calavi, Benin. Usage Restrictions None. License Original 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.