AskIFAS Powered by EDIS

Huanglongbing (HLB; Citrus Greening) and Nutrient Deficiency Identification1

Tripti Vashisth, Megan M. Dewdney, and Jamie D. Burrow 2

Huanglongbing (HLB) is a bacterial disease that is spread by an insect, the Asian citrus psyllid. This fact sheet, which is best viewed as a PDF (, explains how to tell the difference between HLB symptoms and symptoms from nutrient deficiencies.

Figure 1. 
Figure 1. 

Figure 2. 
Figure 2. 


1. This document is PP328, one of a series of the Plant Pathology Department, UF/IFAS Extension. Original publication date June 2016. Revised July 2019. Visit the EDIS website at
2. Tripti Vashisth, assistant professor, Horticultural Sciences Department; Megan M Dewdney, associate professor, Plant Pathology Department; and Jamie D Burrow, Extension program manager; UF/IFAS Citrus Research and Education Center, Lake Alfred, FL 33850.

Publication #PP328

Date: 7/25/2019

Related Experts

Vashisth, Tripti

University of Florida

Dewdney, Megan M.

University of Florida

Burrow, Jamie D.

University of Florida

Fact Sheet


  • Jamie Burrow
  • Megan Dewdney
  • Tripti Vashisth