IFAS Extension
Agriculture
About this Publication
This document is SS-PLP-11, one of a series of the Department of Plant Pathology, UF/IFAS Extension. Original publication date May 1991. Revised August 2014. Visit the Ask IFAS website at https://ask.ifas.ufl.edu/ for the currently supported version of this publication.
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