Leaf tissue analysis is a key to building a good citrus fertilization program in North Florida and South Georgia, according to University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers. The researchers are Muhammad Shahid, assistant professor of horticulture, and postdoc scholar Shahid Iqbal, both with the North Florida Research and Education Center. “Leaf tissue analysis determines the …
Planting and Terminating Summer Cover Crops
By Sarah Strauss One of the keys to good cover crop germination, and thus the potential benefits to soil health, is timing planting with summer rains. As cover crops are planted to improve soil health and are not harvested for profit, you want them to require as little effort on your part as possible. Relying on rain for irrigation can …
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 …
Florida Greenbelt Law Revised
Florida’s tax package was signed into law by Gov. Ron DeSantis June 30. The legislation includes a provision regarding the Greenbelt Law, or tax classification of agricultural land. As of July 1, the revised law ensures that lands taken out of production through a state or federal eradication or quarantine program, such as the Citrus Health Response Program, shall continue to …
Biological Control: A Significant Component of Citrus IPM
By Jawwad A. Qureshi All citrus pests in Florida have natural enemies, although some are more effective at biological control than others. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers have been studying the activity and impact of natural enemies on pest infestations in traditional open production systems and protected systems such as citrus under protective screen …
Soil Sampling Is Key to Cold-Hardy Citrus Fertilization
Soil sampling is one of two keys to building a good citrus fertilization program in North Florida and South Georgia, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers wrote recently. The authors are Muhammad A. Shahid, assistant professor of horticulture, and postdoc scholar Shahid Iqbal, both with the North Florida Research and Education Center. Shahid and Iqbal …
The Potential of Trunk Injection for Fresh Market Citrus
By John M. Chater Citrus tree trunk injection of antibiotics has been recently and widely used in Florida. The success of oxytetracycline (OTC) in sweet orange to mitigate huanglongbing (HLB or citrus greening) disease has been documented by the laboratory of Ute Albrecht, associate professor at the University of Florida. Some results suggest that OTC injection can improve Brix, ratio, …
AI to Assess Crop Damage
Imagine using an artificial intelligence (AI) platform similar to ChatGPT to get crop-damage information after a major storm and comparing it to previous seasons. That’s what University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) AI scientist Nikolaos Tziolas plans to provide for farmers. His project will be funded with a new $297,000 grant from the U.S. Department of …
Best Practices for Brown Rot Management
By Megan Dewdney The Florida rains have finally come this summer, just in time for early-season fruit to start the maturation process. This means there is some risk of brown rot in early sweet oranges and grapefruit. Much of Florida has been getting summer storms, wetting the soil. While this is excellent in general, the downside is that it allows …
Advice on Asian Citrus Psyllid Management
The strategies to control the Asian citrus psyllid (ACP) in Florida have evolved over the years. Some practices have come and gone, but one point remains — ACP control is essential. That was the message Lukasz Stelinski made during the June episode of the All In For Citrus podcast. Stelinski, an entomologist with the University of Florida Institute of Food …
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 …
Boost Citrus Health and Yield With Silicon
By Muhammad A. Shahid and KeAndre Leaks Silicon (Si) is an emerging powerhouse in citrus production, offering wide-ranging benefits for plant health, fruit quality and stress resilience. While not traditionally considered essential, silicon was officially recognized as a “plant beneficial substance” in 2012 by the American Association of Plant Food Control Officials. Its inclusion as an approved input by the …
Recommendations for Oxytetracycline Injections
Three University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers recently issued the document Suggested Use Pattern of Injectable Antimicrobials for Huanglongbing (HLB) Management. The authors are Ute Albrecht, associate professor of horticulture; Ozgur Batuman, associate professor of plant pathology; and Megan Dewdney, associate professor of plant pathology. The antimicrobials for Florida citrus are ReMedium TI and Rectify; …
Sneak Peek: July 2025 Citrus Industry
A July Specialty Crop Grower magazine article explores the potential of trunk injection for fresh market citrus. While trunk injection of oxytetracycline has become a common practice in Florida citrus grown for juice, growers of fresh market varieties have expressed interest in this HLB-management tool. Therefore, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers are studying trunk …
All In For Citrus Podcast, June 2025
In the June All In For Citrus podcast, Michael Rogers gives an update on some of the activities keeping University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers busy this summer. Rogers is the director of the UF/IFAS Citrus Research and Education Center in Lake Alfred. One of their big projects is helping to coordinate the citrus seminars …
Rootstocks for Improved Tolerance to HLB
By Lamiaa Mahmoud and Manjul Dutt Utilizing tolerant rootstocks to combat HLB is a long-term management strategy that can help sustain productivity and enhance tree survival, especially when implemented alongside other HLB management approaches. Australian limes are tolerant to HLB, and their DNA can be incorporated into HLB-susceptible citrus using conventional breeding methods to enhance tolerance to HLB. Over the …
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 …
A Review of Enhanced Efficiency Fertilizers
A newly published article in the Journal of Plant Nutrition and Soil Science explains how enhanced efficiency fertilizers (EEFs) can help maximize yields while reducing farmers’ chances of hurting their pocketbooks or the planet. EEFs include controlled-release fertilizers (CRFs) and slow-release fertilizers (SRFs). Hardeep Singh, a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) assistant professor of cropping …