HLB management

HLB Management Requires an Integrated Approach

Daniel CooperCitrus Expo, HLB Management

At the recent Citrus & Specialty Crop Expo, Ozgur Batuman reminded seminar attendees there is no silver bullet for HLB management. Instead, the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researcher proposes that growers integrate several tools for the management of HLB. These tools include a variety of ways to control HLB-spreading psyllids; oxytetracycline (OTC) trunk injection; …

OTC injection

Influence of Rootstock and OTC Injection on Valencia Yield

Daniel CooperHLB Management, Research, Rootstocks

By Kim D. Bowman, Ute Albrecht and Caroline Tardivo Profitability of citrus in Florida has been severely reduced by the impact of huanglongbing disease (HLB). Previous studies have demonstrated that rootstock selection and injection of established trees with oxytetracycline hydrochloride (OTC) can both significantly improve the health, cropping and fruit quality of trees affected by HLB. However, neither a superior …

incidence

Citrus Greening Incidence Increasing in Brazil

Daniel CooperBrazil, HLB Management

Fundecitrus’ annual survey of citrus greening incidence shows that in 2025 the disease affected 47.63% of orange trees in the Citrus Belt of São Paulo and the Triângulo/Southwest Minas Gerais region. This represents a 7.4% increase compared to 2024, when the incidence was 44.35%. SLOWER RATE OF INCREASE However, for the second consecutive year, a slowdown in the rate of …

Georgia

Determining the Best Satsumas for Georgia

Daniel CooperGeorgia, Varieties

A University of Georgia College of Agricultural & Environmental Sciences (UGA CAES) publicationevaluates 12 early-maturing satsuma varieties and compares them to Owari to determine which ones may be best suited for Georgia. While Owari — harvestable late October through mid-November — is the most popular variety grown in Georgia, growers have an increasing interest in earlier-maturing citrus. The early-maturing varieties …

phytophthora

Proper Site Selection Essential for Phytophthora Prevention

Daniel CooperCold Hardy, Diseases

Vulnerability of citrus trees to phytophthora root rot is a concern for cold-hardy growers. But there are precautions that producers can implement that will guard against infection buildup. One of those precautions includes site selection and not planting trees in poorly drained locations, according to Jonathan Oliver, University of Georgia assistant professor and small fruits pathologist. “Site prep is really …

CITRUS NURSERY SOURCE: Upcoming Opportunities To Tour and Taste

Tacy CalliesCitrus Nursery Source, Events

By Peter Chaires It’s time to log some dates on the calendar. Citrus breeding teams have set dates for this year’s variety displays, field days and open houses. These events present excellent opportunities to learn about their priorities, methods and results. There are opportunities to sample the fruit of the latest promising selections, as well as tour test plantings and …

Genetic Transformation of Citrus: Timelines and Progress

Tacy CalliesBreeding, Citrus Expo

Researcher Manjul Dutt told a Citrus & Specialty Crop Expo audience in August why it can take up to 14 years to get a genetically modified citrus tree from discovery to commercial release. He also discussed the transgenic citrus progress at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), where he is an assistant professor at the …

Bamboo May Offer Alternative to Citrus in Florida

Tacy CalliesAlternative Crops

With a global market valued at nearly $67 billion, bamboo may offer an alternative crop for Florida citrus growers whose groves have been devastated by HLB.   “Bamboo is a good alternative crop to diversify beyond citrus,” said Michael Rogers, director of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center (CREC). “The …

diseases

Phytophthora Root Rot a Concern in the Cold-Hardy Region

Tacy CalliesCold Hardy, Diseases

Phytophthora root rot’s impact on young citrus trees is concerning for groves in the cold-hardy citrus region of North Florida, South Georgia and South Alabama. Newly planted trees are more vulnerable to the disease than older, established trees, says Jonathan Oliver, University of Georgia assistant professor and small fruits pathologist. He discussed the disease’s impact during the Citrus Grower’s Summer …

Sneak Peek: September 2025 Citrus Industry

Daniel CooperSneak Peek

The September issue of Specialty Crop Grower features an article on the Citrus & Specialty Crop Expo’s extensive educational program. Read highlights of what growers learned over the two-day Tampa event and hear more in the August episode of the All In For Citrus podcast. The Citrus Industry section of the magazine begins with an article detailing two big announcements …

craft

CRAFT Informational Meetings Draw Big Interest

Daniel CooperCRAFT, planting

With a record amount of funding from the Florida Legislature, the Citrus Research and Field Trial (CRAFT) Foundation hosted a road show in early September that included stops in Fort Pierce, Lake Placid and Lake Alfred to provide information about grower programs. All three stops were well attended by growers interested in learning about the latest cycle of funding. With …

All In for Citrus

All In For Citrus Podcast, August 2025

Daniel CooperAll In For Citrus Podcast, Citrus Expo

The August All In For Citrus podcast features seminar recaps from the Citrus & Specialty Crop Expo, which was held this month at the Florida State Fairgrounds in Tampa. The event included an extensive citrus educational program with more than 20 presentations. Michael Rogers, director of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and …

plot

Florida CUPS: From a Small Plot of Potted Plants to 1,500 Acres

Daniel CooperCUPS

When University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Professor Arnold Schumann started a citrus under protective screen (CUPS) plot in Florida in 2014, the grapefruit trees were in above-ground pots. The plot at the Citrus Research and Education Center was on 1.33 acres that included 1 acre of planted citrus. After five years, the grapefruit trees on …

fruit drop

Reducing Fruit Drop in HLB Citrus

Daniel CooperFruit Drop, HLB Management, Tip of the Week

By Tripti Vashisth Fruit drop has become one of the biggest challenges for Florida citrus growers, especially in groves hit hard by HLB. On top of the disease, recent hurricanes like Ian and Milton have made the problem worse, causing fruit to drop not just during the storm but often weeks later. Other stresses — such as drought, flooding or …

gene

Gene-Edited Citrus Comes Closer to Commercial Realization

Daniel CooperBreeding, Research

In 2012, Jennifer Doudna, Emmanuelle Charpentier and their research team published a paper in the journal Science describing the CRISPR-Cas9 system as a precise gene-editing tool. It was considered a major scientific breakthrough with huge possibilities in human medicine and in agriculture. Doudna and Charpentier were awarded the Noble Peace Prize in chemistry in 2020 for their pioneering work with …

sweet spot

CUPS: Sweet Spot, AI Tool and Spraying

Daniel CooperCUPS

Researcher Arnold Schumann recently discussed much about citrus under protective screen (CUPS), including the ‘sweet spot’ size for a structure, an artificial intelligence (AI) tool for gathering information, and pest spraying tips. The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) professor has learned much from a CUPS facility he initiated in 2014 and from commercial CUPS growers. …

CRAFT

Applications Open for CRAFT Programs

Tacy CalliesCRAFT

Applications are being accepted for the Citrus Research and Field Trial (CRAFT) seventh program year. Applications must be submitted at the CRAFT website by Oct. 3. Here is a summary of available 2025 CRAFT programs:    TRADITIONAL NEW TREE PLANTING PROGRAMThis program evaluates grower recommended rootstock/scion combinations in real-world commercial conditions. FAST TRACK NURSERY STOCK PROGRAMThe CRAFT board has identified …

high-density plantings

Managing Psyllids in Groves and Protected Structures

Tacy CalliesPsyllids, Tip of the Week

By Jawwad A. Qureshi The impact of the Asian citrus psyllid continues to intensify through devastation of its vectored huanglongbing (HLB) disease. Although there is no permanent solution for HLB yet, psyllid suppression reduces its impact. Chemical control is the most implemented method. Its strategic use helps reduce psyllid resistance and collateral damage to non-target organisms, including beneficial organisms needed …

Research Renders Reasons to Replant

Tacy CalliesCitrus, planting, Research

By J. Scott Angle, jangle@ufl.edu, @IFAS_VP Growing up in Polk County, Emily Worbington saw the groves disappearing. She passed more and more rooftops as she drove around Auburndale. In nearby Eagle Lake, Joe Volpe watched trees vanish, too. In fact, he tore out trees himself in his family’s century-old grove. “It broke my heart,” he says. PERSONAL PURSUITSWorbington and Volpe’s …