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Citrus blight is a wilt and decline disease of citrus whose cause has not been determined. The first symptoms are usually a mild wilt and grayish cast to the foliage often accompanied by zinc deficiency symptoms on trees. Trees rapidly decline with extensive twig dieback, off-season flowering, and small fruit. Blight trees reach a stage of chronic decline, but seldom die. This 2-page fact sheet is part of the 2018–2019 Florida Citrus Production Guide. Written by Ozgur Batuman, Pamela D. Roberts, and Ronald H. Brlansky, and published by the UF/IFAS Plant Pathology Department, May 2018. PP-180/CG038: 2022–2023 Florida Citrus Production Guide: Blight (ufl.edu)