IFAS Extension
Release Date: 5/25/2026
Agriculture
Abstract
This document discusses the occurrence and management of large patch disease in warm-season turfgrasses, particularly St. Augustinegrass and zoysiagrass. It explains the conditions that trigger the disease, symptoms, and signs of infection. The article emphasizes cultural controls, such as nutrient and water management, and chemical controls, including various fungicides. It also highlights the importance of integrating cultural practices with chemical treatments for effective disease management and recovery of turfgrass. First published: May 1991.
About this Publication
This document is SS-PLP-5, one of a series of the Department of Plant Pathology, UF/IFAS Extension. Original publication date May 1991. Revised August 2014 and December 2025. Visit the Ask IFAS website at https://ask.ifas.ufl.edu/ for the currently supported version of this publication.
How to Cite
Elliott, M. L., & Harmon, P. F. (2014). Large Patch. EDIS, 2014(8). https://doi.org/10.32473/edis-lh044-1991
Authors
Monica Elliott
Specialist
University of Florida
professor emeritus, Department of Plant Pathology, UF/IFAS Fort Lauderdale Research and Education Center
Philip Harmon
Specialist
University of Florida
professor and Extension plant pathologist, UF/IFAS Department of Plant Pathology