Citrus Greening (Huanglongbing, HLB)

Tripti Vashisth, Davie Kadyampakeni, and Jamie D. Burrow

This is a two-sided poster. To improve production of huanglongbing (HLB) affected trees, nutrition, irrigation, and soil pH should be considered together, because each can influence the efficacy of the others in overcoming the effects of HLB on tree performance.

Ariel Singerman, Ariel Singerman, andFritz Roka
Other Contacts: William A. Messina, Jr.

Tripti Vashisth, Megan M. Dewdney, andJamie D. Burrow

Huanglongbing (HLB) is a bacterial disease that is spread by an insect, the Asian citrus psyllid. This 2-page fact sheet explains how to tell the difference between HLB symptoms and symptoms from nutrient deficiencies.

Megan M. Dewdney, Tripti Vashisth, andLauren M. Diepenbrock

2026–2029 Florida Citrus Production Guide (Citrus Production Fundamentals).

Ariel Singerman, Ariel Singerman, andMaria D. Useche
Other Contacts: William A. Messina, Jr.

A UF/IFAS numbered Fact Sheet. Published by Farm Economics, entrepreneurship, and management

Fernando Alferez, Ute Albrecht, Ozgur Batuman, Jawwad Qureshi, andMongi Zekri

Psyllid exclusion is the most effective strategy to keep citrus trees free from HLB. Individual protective covers (IPCs) are a novel strategy based on psyllid exclusion of individual trees using a protective mesh bag. This new 3-page publication summarizes the knowledge we have accrued from our 3-year-long field studies using the IPC system and provides recommendations that can help with effective use of this technology.

Marina Burani-Arouca, Ariel Singerman, Ariel Singerman, Marina Burani-Arouca, andStephen H. Futch
Other Contacts: William A. Messina, Jr.

A UF/IFAS numbered peer reviewed Fact Sheet. Published by Farm Economics, entrepreneurship, and management

Shourish Chakravarty, Tara Wade, Ute Albrecht, Ozgur Batuman, andThomas H. Spreen

This publication provides per-tree and per-acre costs of adopting oxytetracycline (OTC) trunk injections for large-scale orange production in southwest Florida. The values represent the costs observed by early adopters (i.e., the 2023–24 season). This information will be helpful to citrus growers, Extension agents, and other citrus industry stakeholders interested in understanding the costs of trunk injection and OTC applications in tree crop production. The values shared are estimates; costs will vary depending on the operation’s application methods, products used, tree density, and other grove characteristics. Written by Shourish Chakravarty, Tara Wade, Ute Albrecht, Ozgur Batuman, and Thomas H. Spreen, and published by the UF/IFAS Department of Food and Resource Economics, June 2025.

Tripti Vashisth

The goal of this publication is to provide the latest gibberellic acid (GA) use recommendation to Florida citrus growers. Recently, a multiyear field trial conducted on ‘Valencia’ has shown that GA applied monthly from September to January can improve yield of HLB-affected trees on average by 30% compared to untreated trees. Although GA treatment cannot eradicate the pathogen that causes HLB in affected citrus trees, the current GA application recommendation can provide growers an alternative remedy to alleviate HLB symptoms and ameliorate the production issues that are associated with the disease, including yield decline, reduced fruit size, increased preharvest fruit drop, and rapid tree health decline, until a cure for HLB or complete HLB-resistant cultivars can be developed. Written by Tripti Vashisth, and published by the UF/IFAS Horticultural Sciences Department, April 2023.

Nicole M. Dodds, Joy Rumble, Nicole M. W. Dodds, Laura M. Gorham, andJoy N. Rumble
Other Contacts: Ricky Telg

A UF/IFAS numbered Fact Sheet. Published by Citizen awareness of food systems and the environment