This tool is part of the Citrus Resource

Citrus Diseases




This tool was greatly enhanced in its value and usability by the addition of several hundred images provided by several contributors. These contributors are:

Ron Brlansky, Jim Graham, Michael E. Rogers, and L. W. "Pete" Timmer from the University of Florida (UFL), Citrus Research and Education Center (CREC),

MaryLou Polek, Citrus Research Board (CRB), California,

David Ezra, Agricultural Research Organization (ARO), Volcani Center, Israel,

A.A. Seif, icipe (African Insect Science for Food and Health), Nairobi, Kenya

Antonio Vicent, Instituto Valenciano de Investigaciones Agrarias (IVIA), Spain,

Melike Yurtmen, Plant Protection Research Institute, Adana, Turkey, and

Paul Chaloux, Hilda Gomez, Tim Gottwald, Charla Hollingsworth, Richard Lee, Tim Riley, Dan Robl, Ray Yokomi, USDA-APHIS-PPQ-Molecular Diagnostic Lab from the US Department of Agriculture (USDA).

Several images were used with the permission of James Adaskaveg (University of California, Riverside), UCIPM, UC Davis, CA, University of California Statewide IPM Program (, and EcoPort (

A special thank you goes out to David Ezra, Ray Yokomi and Melike Yurtmen for lending their expertise and providing fact sheets of diseases and keying those diseases, which were added later in the tool development process.

John da Graca (Texas A&M University), Tim Gottwald, L. W. "Pete" Timmer, Jim Graham, Bacilio Salas (USDA), and MaryLou Polek helped by providing their expertise and knowledge.

The authors would like to thank Terrence Walters, Amanda Redford, Charla Hollingsworth, and Pat Gomes for their guidance.

For beta-testing and reviewing early versions of this tool, the authors would like to thank the following people:
Matthew S. Bradford, Hilda Gomez, Kathlyn Herbes, Dan MacKinnon, Carl Lightfoot, Lisa Martin, Jessica Mills, Mayling Padron, Amanda Redford, Michael J Reidy, Tim Riley, Barbara A. Schading, Julia Scher, and Terrence Walters.


Citrus Diseases
March, 2013