Surveys for natural enemies of waterhyacinth were conducted during 1988-91 at different places in Haryana State. Leaf spots characterised by compact zonations. starting, from tip of the leaf and spreading backwards were observed. The pathogen was identified as Epicoccum nigrum L. Koch's postulates were fulfilled. Waterhyacinth plants, when inoculated responded differently to infection depending upon the morphotyplc state or development of the plant. Leaf infections were 20 to,40% and 25 to 50%, in covered and uncovered pits respectively. Maximum growth of the fungus occurred on waterhyacinth dextrose agar.