Use Patterns and Residue Levels of Pesticides on Mukunuwenna, a Leafy Vegetable Grown in Sri Lanka G. K. Hemakanthi de Alwis, R. D. Wijesekera, T. A. D. N. A. K. Jayasekera Department of Chemistry, University of Colombo, Colombo 03, Sri Lanka Received: 15 July 2005/Accepted: 15 November 2005 Correspondence to: G. K. Hemakanthi de Alwis, Centers for Disease Control and Prevention, 4770 Buford Highway, NE, Mailstop F17, Atlanta, GA 30341, USA Bull. Environ. Contam. Toxicol. (2006) 76:119–125 © 2006 Springer Science+Business Media, Inc. DOI: 10.1007/s00128-005-0897-3 119