commercial

University of Georgia Lab Offers HLB Testing

Daniel CooperGeorgia, HLB Management

The University of Georgia’s (UGA) Plant Molecular Diagnostic Laboratory (MDL) on the Tifton campus is a U.S. Department of Agriculture-certified lab performing huanglongbing (HLB, also known as citrus greening) testing. It offers the advanced test to commercial growers, homeowners, nurseries, Extension and research personnel and the Georgia Department of Agriculture. The molecular test per sample costs $80. Candidatus Liberibacter species associated with HLB …

areas

HLB Quarantine Areas Expanded in California

Daniel CooperCalifornia Corner, HLB Management, Regulation

Federal and state agriculture officials have expanded the areas quarantined for huanglongbing (HLB; also known as citrus greening) in California. The action was taken by the U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) in cooperation with the California Department of Food and Agriculture (CDFA).  APHIS is adding portions of Los Angeles, San Diego and Ventura counties …

tolerant

Growers Must Settle for HLB-Tolerant Trees While Waiting for Resistance

Daniel CooperEvents, HLB Management, Varieties

The dream of citrus varieties being totally resistant to huanglongbing (HLB) disease (citrus greening) is still a distant reality for Florida growers. For now, they must depend on tolerant varieties to lessen the disease’s impact, which is widespread throughout most of the state. Michael Rogers, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center …

hlb

HLB Could End Georgia’s Citrus Industry

Daniel CooperGeorgia, HLB Management

One California citrus leader believes Georgia should respond more aggressively to huanglongbing (HLB, also known as citrus greening) for the sake of the industry’s future in the state. Roger Smith, fourth-generation citrus producer and executive of AC Foods, spoke during the recent Georgia Citrus Association meeting in Tifton. He discussed the disease that devastated citrus production in Florida and could …

expanded

Discovery Speeds Push for HLB-Tolerant Citrus

Daniel CooperBreeding, Orange Juice, Research

It’s one thing for a hybrid citrus tree to tolerate HLB, but quite another thing for it to produce orange-like fruit that makes delicious orange juice (OJ). That holy grail of traits could be nearer, thanks to a team of U.S. Department of Agriculture Agricultural Research Service (USDA-ARS) and University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) scientists. …

study

HLB Management Different for North Florida Citrus

Daniel CooperCold Hardy, HLB Management

Living with huanglongbing (HLB) disease (citrus greening) is a much different process for citrus growers than protecting their crop from it. Growers in the cold-hardy citrus region are currently trying to keep the devastating disease out of their area. Industry experts like Michael Rogers, University of Florida Institute of Food and Agricultural Sciences Citrus Research and Education Center director, are …

hlb

Irrigation During the Dry Season to Increase Yield of HLB Trees

Daniel CooperIrrigation, Tip of the Week

By Tripti Vashisth and Mary Sutton Prolonged water deficits can negatively impact flowering, fruit growth, crop load and fruit quality. Unfortunately, HLB-affected trees are more susceptible to water deficits than healthy trees due to extensive root loss. Observing HLB-affected trees throughout the dry season showed that severely symptomatic trees consistently had lower leaf water potential than mildly symptomatic trees. This …

CRISPR

CRISPR Is Bringing Citrus Closer to HLB Resistance

Daniel CooperBreeding, HLB Management, Research

You’ve probably heard the term CRISPR in recent years. It is a relatively new breakthrough in science that has applications in human health and even in the fight against HLB. Nian Wang, a professor of microbiology and cell science with the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), has been on the forefront of CRISPR research. Here …

HLB-affected trees

PGRs for HLB-Affected Trees: An Update

Daniel CooperHLB Management, PGRs

Using the plant growth regulators (PGRs) cytokinin in spring, gibberellic acid (GA) in summer and 2,4-D in late fall can be helpful for HLB-affected trees, horticulturist Tripti Vashisth reported. Her PGR update came during a Feb. 21 OJ Break. Multi-county citrus Extension agent Chris Oswalt hosted the event at the University of Florida Institute of Food and Agricultural Sciences Citrus …

Crop Transformation Center

Crop Transformation Center Takes Aim at HLB Resistance

Daniel CooperBreeding, HLB Management, Research

By Frank Giles The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) has established itself as a leader in new technological frontiers like artificial intelligence (AI). In fact, the school has the 15th most powerful computer in the world. The HiPerGator, as the computer is called, will assist in AI development and on many other technological fronts. Another …

citrus greening

New Light Shed on HLB and Fertilization

Tacy CalliesHLB Management, Nutrition

The effort to help huanglongbing (HLB)-impacted citrus trees has taken another step forward. A University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) study examined the relationship between fertilization, root health and fruit yield. Researchers focused on Valencia orange trees with HLB. Associate Professor Davie Kadyampakeni led the effort at the UF/IFAS Citrus Research and Education Center. The study, …

Louisiana HLB Quarantine Area Expanded

Tacy CalliesDiseases, Louisiana, Regulation

Federal agriculture officials, in cooperation with Louisiana agriculture officials, have established a federal quarantine area for huanglongbing (HLB; citrus greening), caused by Candidatus Liberibacter asiaticus, in all of Saint Charles Parish in Louisiana. The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (USDA APHIS) took the action in cooperation with the Louisiana Department of Agriculture and Forestry (LDAF). …

How Mexico Has Dealt With HLB

Tacy CalliesHLB Management, Mexico

Mexico’s Ministry of Agriculture and Rural Development recently pointed out ways the country has successfully dealt with huanglongbing (HLB), the most devastating disease of citrus worldwide. The ministry reported that the disease has triggered socioeconomic problems in other citrus-producing countries and regions in the Americas, Africa and Asia. “With appropriate agronomic-phytosanitary management, the life of affected trees can be prolonged, …

ReMedium TI®

Starting in the Grove to Find New HLB Therapies

Tacy CalliesHLB Management, Research

By Randall P. Niedz, Guilherme Locatelli, Nick Larson, Lorenzo Rossi, Ellen Cochrane and Michelle Heck Scientists at the U.S. Department of Agriculture-Agricultural Research Service (USDA-ARS) developed an idea to bypass lab assays and test molecules directly in the field for their ability to solve HLB. As part of a USDA National Institute of Food and Agriculture (NIFA) grant (number 2020-70029-33176), …

HLB-Affected Trees Use Less Water

Tacy CalliesHLB Management, Irrigation, Tip of the Week

By Davie Kadyampakeni  Huanglongbing (HLB) is a citrus disease that affects the growth of the fibrous roots of citrus trees. This means that HLB-affected trees may have reduced root volume, which impacts water uptake. A greenhouse study was conducted from October 2019 to July 2021 at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and …

Taking a ‘Long Shot’ at HLB-Tolerant Grapefruit

Tacy CalliesCitrus, Grapefruit, HLB Management, Research

A U.S. Department of Agriculture (USDA) scientist and his team are hopeful that some so-called “long-shot” varieties will pay off in the effort to find HLB-tolerant grapefruit. Matthew Mattia of the USDA Agricultural Research Services (ARS) U.S. Horticultural Research Laboratory in Fort Pierce, Florida, found the varieties at the A.H. Whitmore Foundation Farm in Groveland, Florida. The varieties are Florida …

New Center to Accelerate HLB Solutions

Tacy CalliesBreeding, Technology

By J. Scott Angle, jangle@ufl.edu, @IFAS_VP My job is to help you make money. By changing the way the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) does business in pursuing citrus solutions, I hope to change your business for the better. We’ve just launched a UF/IFAS Crop Transformation Center (CTC). It has the potential to speed delivery …

Studying the Mechanisms for HLB Tolerance

Tacy CalliesAll In For Citrus Podcast, Research, Varieties

John Chater has been on the job now for two years, working with growers to evaluate variety performance in field trials. In the latest All In For Citrus podcast episode, the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) assistant professor discusses his work, including grower collaboration to study new varieties in real-world environments. Chater also talks about …

California Researchers Seek HLB Tolerance

Tacy CalliesCalifornia Corner, HLB Management, Research

University of California, Riverside (UCR) has received three federal grants totaling more than $11 million for research focused on instilling HLB-tolerance in citrus trees. The grants are from the U.S. Department of Agriculture’s (USDA) National Institute of Food and Agriculture (NIFA). The funding was enabled by the 2018 Agricultural Improvement Act, which authorized the Emergency Citrus Disease Research and Development …

Research Team Aims for HLB Resistance/Tolerance

Tacy CalliesHLB Management, Research

A team led by Clemson University is receiving a second multimillion-dollar federal grant to continue research into HLB. Feng Luo, the Marvin J. Pinson, Jr. ’46 Distinguished Professor in the School of Computing, is the principal investigator. The project is funded with $4.1 million from the U.S. Department of Agriculture’s National Institute of Food and Agriculture (USDA NIFA). Co-principal investigators …