Abstract
Exocortis and cachexia are diseases caused by viroids, which can lead to stunted growth and reduced yields in affected plants. Viroids are small, low-molecular-weight, infectious RNA molecules. This 1-page fact sheet is part of the 2018–2019 Florida Citrus Production Guide. Written by Ozgur Batuman, Amit Levy, and Ronald H. Brlansky, and published by the UF/IFAS Plant Pathology Department, May 2018.