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 …
Factors That Influence Juice Quality
By Tripti Vashisth, Johann Hiller and Taylor Livingston Poor fruit quality has long been a significant hurdle for sweet orange growers in the HLB era. With high fruit drop rates and challenges in harvest management, many growers find themselves picking fruit earlier than ideal, resulting in subpar Brix levels. To effectively improve the Brix of the fruit, it is essential …
CRAFT Informational Meetings Draw Big Interest
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 …
CUPS: Sweet Spot, AI Tool and Spraying
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. …
Applications Open for CRAFT Programs
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 …
Research Renders Reasons to Replant
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 …
$675.9 Million Disaster Assistance Block Grant for Florida Farmers
U.S. Secretary of Agriculture Brooke Rollins appeared today at Cooperative Producers Inc. in Felda, Florida, to meet with agricultural leaders and growers to announce additional U.S. Department of Agriculture (USDA) assistance to help producers recover from Hurricanes Idalia, Debby, Helene and Milton. Rollins signed a block grant agreement with the Florida Department of Agriculture and Consumer Services (FDACS) to provide …
Water Use Under Individual Protective Covers
By Fernando Alferez and Osbaldo Vasquez During the last seven years, the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Southwest Florida Research and Education Center (SWFREC) in Immokalee has been performing comprehensive studies on the use of individual protective covers (IPCs). This tool is now adopted by most growers planting new citrus trees in Florida both in …
OTC Impacts on HLB in Trees and Psyllids
During the recent Florida Citrus Industry Annual Conference, Kirsten Pelz-Stelinski, director of the University of Florida Institute of Food and Agricultural Sciences Mid-Florida Research and Education Center, presented evaluations of trunk-injected antimicrobials for HLB management. She said the purpose of these antimicrobial treatments is a short-term or stop-gap approach to keep the current inventory of Florida citrus trees in the …
Two Genome-Edited Trees Are Approved
Two non-transgenic genome-edited orange plants — a Hamlin and a Valencia that may resist HLB — have been federally approved and are ready for Florida growers. Nian Wang, University of Florida Institute of Food and Agricultural Sciences eminent scholar endowed chair in biotechnology, reported this news in a June 17 virtual presentation. The plants, which Wang termed “Eds1-edited,” have received …
CRAFT Continues to Push New Plantings and HLB Therapies
During the recent Florida Citrus Industry Annual Conference, Steven Hall provided an update on the Citrus Research and Field Trial (CRAFT) programs. Hall is executive director of the CRAFT Foundation. CRAFT programs have been very popular among growers to incentivize new plantings and build knowledge about HLB therapies like trunk injection, the use of individual protective covers, plant growth regulators …
Positive Changes
By J. Scott Angle, jangle@ufl.edu, @IFAS_VP Two and a half years ago, Riley McKenna leveled with his dad. Without a tool that made a noticeable difference in the grove soon, it might be time for dad to retire and Riley to seek a new career. So why was he spending an April day with me and his cousin Morgan McKenna …
Consider Summer Gibberellic Acid Applications
By Tripti Vashisth, Maricielo Postillos and Taylor Livingston In recent years, many citrus growers in Florida have begun using gibberellic acid (GA) to enhance tree growth and productivity. Initially, the recommendation was to apply GA monthly from September to January for Valencia oranges to maintain canopy health, reduce fruit drop and improve yields. However, some growers are hesitant about applying …
Grove-First Expands Search for HLB-Fighting Molecules
By Randall P. Niedz and Michelle Heck Grove-First is a collaborative research initiative developed by U.S. Department of Agriculture Agricultural Research Service (USDA/ARS) scientists and partners to solve citrus greening (HLB) by evaluating potential treatments directly in the field. This direct-to-field strategy is based on the idea that only field testing can determine whether a treatment can rejuvenate HLB-infected trees …
Podcast Topics: OTC Survey Results and Snail Research
Trunk injection of oxytetracycline (OTC) to treat HLB is widely regarded as one of the biggest breakthroughs in the long fight against the disease. After two seasons of treatments, where do Florida citrus growers stand when it comes to the treatment? Tara Wade answers that question in the latest episode of the All In For Citrus podcast. The University of …
Dealing With Disease: Canker, Black Spot and More
As the rainy season in Florida is set to begin, we caught up with Megan Dewdney to discuss citrus canker and other disease issues. Dewdney is a plant pathologist with the University of Florida Institute of Food and Agricultural Sciences. Q: How has the prevalence of citrus canker been in Florida in the past year or so? A: Dewdney: Citrus …
Take the Sting Out of Fire Ants
Effective fire ant control calls for long-term, proactive treatment. It isn’t enough to fight the fire ants on the surface. Fire ant tunnels can extend deep underground, up to 25 feet away from visible mounds. The fire ants you can see are only a fraction of the problem – and are easily replaceable. Central Life Sciences has the product solutions …
The Causes of Alternate Bearing
Mary Sutton, University of Georgia (UGA) assistant professor and citrus Extension specialist, recently wrote about the causes of alternate bearing in Georgia groves. Alternate bearing is a common problem in many mandarin varieties. A slightly edited version of Sutton’s report follows. CARBOHYDRATES During photosynthesis, leaves produce sugars that are either exported and utilized for growth or stored as starch in …
California Valencia Orange Forecast Issued
The California Department of Food and Agriculture (CDFA), cooperating with the U.S. Department of Agriculture National Agricultural Statistics Service, has forecast California’s 2024–25 Valencia orange production at 15 million cartons. California’s final utilized production the prior season was 18.6 million cartons. Cartons have a standard equivalent weight of 40 pounds. CDFA reported there are 25,000 bearing Valencia acres in 2024–25, …
The Harm Weeds Do
Before HLB, canker and diaprepes root weevils became major problems for Florida citrus growers, weeds were among the constant and major annoyances in groves. Even with the pests and diseases growers have faced over the past five decades, the need for weed control may be as important, and costly, as ever. A University of Florida Institute of Food and Agricultural …





























