Awais Khan (IMAGE) Cornell University Caption Awais Khan, associate professor of plant pathology and plant-microbe biology, examines apples in an orchard. Credit Allison Usavage, Cornell University 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.