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 …
How to Achieve Accurate Herbicide Application
By Ramdas Kanissery As the summer season of weed control kicks off in citrus groves, now is the perfect time to make sure your spray rigs are set up for success. Effective weed control depends on: In many cases, poor herbicide performance is caused by two main issues: spraying at the wrong time and using incorrect application techniques. We’ve already …
Grower Participation Sought for Slug and Snail Survey
Researchers at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) are asking growers to participate in a survey about slug and snail pests affecting horticultural crops. The outcome will aid in a research project aimed at the development of appropriate Extension and research control methods against these pests. The title of the research project is Understanding and …
Managing Aggressive Weeds in Citrus
Ramdas Kanissery gave advice for growers in a May 20 virtual presentation about managing aggressive weeds in citrus. Kanissery is a University of Florida Institute of Food and Agricultural Sciences associate professor of horticultural sciences at the Southwest Florida Research and Education Center in Immokalee. A summary of his recommendations follows. CULTURAL PRACTICES PRACTICAL APPROACHES As part of his presentation, …
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 …
Injection Month Affects Fruit Size, Juice Quality and OTC Residues
By Ute Albrecht, Gabriel Pugina, Caroline Tardivo, Jasmine de Freitas and Deived de Carvalho The month during which oxytetracycline (OTC) injections are performed can have a considerable impact on fruit size, juice quality and OTC fruit residues. Citrus fruit development can be divided into three overlapping stages: If injections are performed during Stage I, they promote cell division, which increases …
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 …
Sneak Peek: June 2025 Citrus Industry
The June issue of Specialty Crop Grower magazine honors the winner of the 2025 Citrus Achievement Award. Ben Albritton, this year’s recipient, is a fourth-generation citrus grower and Florida politician. Learn all about his career and accomplishments in the cover story. Don’t miss the digital edition of the magazine to see an exclusive video interview. Albritton and Specialty Crop Grower …
Millennium Block Research Update
Flavia Zambon, assistant professor with the University of Florida Institute of Food and Agricultural Sciences, recently provided an update about Millennium Block research at the Indian River Research and Education Center. The block, established in 2019–20, is a large-scale, 5,500-tree trial seeking HLB-tolerant citrus varieties. Zambon says some varieties in the trial are showing strong fruit attributes without the need …
What To Do About Pesky Red Patches From Algal Spot
By Megan Dewdney Every summer, a low rumble about algal spot reaches my ears. And every year, someone discovers it in their Florida grove for the first time. While this is a disease that is not always at the top of mind for growers, when you see it for the first time, it can be dramatic. DISEASE SYMPTOMS Algal spot …
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 …
Fire Ant Management
By Lauren Diepenbrock Red imported fire ants (Solenopsis invicta), commonly referred to as fire ants, are found throughout Florida. This pest infests a broad range of habitats, including urban regions, natural areas and production fields. In citrus, there are a range of impacts from this pest — from human health to both direct and indirect tree impacts. From a human …
Optimizing Nitrogen Applications in North Florida
Four University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) horticulture researchers recently wrote an update in the Cold Hardy Citrus Connection about optimizing citrus nitrogen applications in North Florida. The authors are Muhammad A. Shahid, Davie Kadyampakeni, Shahid Iqbal and Muhammad Nadeem. The following edited excerpts explain the research project and provide conclusions: THE RESEARCH The need for …
Bridging the Gap to the Tree of the Future
The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center hosted an OJ Break seminar on May 14. The speakers provided updates on developing a gene-edited citrus tree with resistance to HLB and how growers can use existing tools to mitigate the disease. Nian Wang, UF/IFAS professor, provided an update on the status of …
Spinach Peptides Provide Defense Against HLB
Texas A&M AgriLife Research scientists have developed an approach to countering the citrus disease HLB as well as zebra chip disease in potatoes and other vegetables. Their method uses spinach antimicrobial peptides, known as defensins, which naturally defend plants against a broad range of pathogens. Their study results were recently published in the Plant Biotechnology Journal. The effects show significant …
CUPS: Pest Monitoring and Management
By Jawwad A. Qureshi Several insect pests and mites colonize citrus crops in traditional open orchards. Most pests are localized and are suppressed by predators, parasitoids and entomopathogens to levels that are not economically damaging to the crops. The Asian citrus psyllid (ACP) is the primary vector of huanglongbing (HLB) disease. Despite biological and chemical control of ACP, growing a …
Management of Mites for Fresh Market Citrus
University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Associate Professor Xavier Martini recently wrote an article In the Cold Hardy Citrus Connection about management of mites for fresh market citrus. Martini is an entomologist at the North Florida Research and Education Center. An edited version of his article follows. Two types of mites mainly affect citrus production in …
Snail Management Can Be Complex
By Lauren Diepenbrock Snail management is becoming a more common discussion in Florida citrus with the arrival of a newer species in the Southeast. The snail of concern is Bulimulus bonariensis, previously referred to as Bulimulus sporadicus (Figure 1). Over the past three years, the first emergence of newly hatched snails was noted in late April through early May. The …
Developing Snail Management Programs in Florida Citrus
By Lauren Diepenbrock and Nicole Quinn In recent years, a new pest has been added to the ever-evolving scope of pest management in Florida citrus: Bulimulus bonariensis snails. These snails, also referred to as ghost snails or peanut snails, were reported to be clogging irrigation jets in Central Florida in 2020 in limited locations. Now, in 2025, they have spread …
PGRs Can Produce Remarkable Results
Tripti Vashisth, associate professor of horticultural sciences with the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), has been studying the use of plant growth regulators (PGRs) to improve citrus tree health and fruit retention for several years now. Her work has culminated into a systems approach of when to use a particular PGR at a certain time …