Ryegrass (IMAGE) American Phytopathological Society Caption Plant phenotype of Lolium perenne infected with Epichloë festucae wild type (WT), ΔcdaA, ΔcdaB, and ΔcdaAΔcdaB mutants. Credit Nazanin Noorifar, Matthew S. Savoian, Arvina Ram, Yonathan Lukito, Berit Hassing, Tobias W. Weikert, Bruno M. Moerschbacher, and Barry Scott Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. No derivatives or adaptations of the work are permitted. License CC BY-NC-ND 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.