Citrus Canker Symptoms on Nursery Trees1

Timothy D. Riley, Megan M. Dewdney, and Jamie D. Burrow 2

This document is a two-page illustrated identification sheet for citrus canker symptoms that appear in citrus nurseries. The document can be downloaded from or by clicking the PDF icon in the top left corner.


1. This document is PP304, one of a series of the Plant Pathology Department, UF/IFAS Extension. Original publication date February 2013. Revised August 2018. Visit the EDIS website at
2. Timothy D. Riley, plant pathologist, Citrus Health Response Program, USDA APHIS PPQ; Megan M. Dewdney, assistant professor, Department of Plant Pathology, Citrus Research and Education Center; and Jamie D. Burrow, Extension program manager, Citrus REC; UF/IFAS Extension, Gainesville, FL 32611.

The Citrus Health Response Program is a collaborative effort involving growers, federal and state regulatory personnel, and researchers. Its goal is to sustain the U.S. citrus industry, maintain growers' continued access to export markets, and safeguard citrus-growing states against a variety of citrus diseases and pests.