Leafhopper and Alfalfa (IMAGE) University of Maryland Caption A nymph-stage potato leafhopper (Empoasca fabae, right of center) rests on a leaf of alfalfa (Medicago sativa). The discoloration and scarring seen on the leaves is called "hopperburn," and is the result of a toxin contained in leafhopper saliva. Credit William Lamp 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.