Plant Pathologist Joins UF/IFAS

Josh McGillCitrus

Plant pathologist joins UF/IFAS to help solve citrus industry issues By: Robin Koestoyo FORT PIERCE, Fla. – A plant pathologist with 12 years of experience in plant-microbe interactions has joined the faculty of the University of Florida Institute of Food and Agricultural Sciences’ Indian River Research and Education Center (IRREC) to help citrus growers. Following an international search for a …

April

Sneak Peek: April 2026 Citrus Industry

Daniel CooperEvents, Sneak Peek, Varieties

The Citrus Industry section of the April 2026 issue of Specialty Crop Grower highlights ongoing efforts to strengthen Florida’s citrus sector amid challenges. Articles this month showcase education, nutrient management and variety development. A recap of the Florida Citrus Show details a successful March event in Fort Pierce that combined education with a lively tailgate-style trade show. Growers Daniel Hunt, …

postfreeze

Postfreeze Citrus Recovery Strategies

Daniel Cooperfreeze, Tip of the Week

By Muhammad A. Shahid, KeAndre Leaks, Davie Kadyampakeni and Carlos Aucique-Perez Postfreeze citrus tree management requires patience and careful observation rather than immediate intervention. Damage to the vascular system (cambium, xylem and phloem) may take months to fully appear. Trees can initially flush in spring but later decline if internal tissues are too compromised. A reliable assessment of survival should …

crdf

CRDF Board Funds More Research Projects

Daniel CooperCRDF, Research

The Citrus Research and Development Foundation (CRDF) board of directors held a lengthy discussion about the upcoming merger with the Citrus Research and Field Trial (CRAFT) Foundation during its March meeting. Then the board considered research projects and funded four of them. A project by Hailing Jin of the University of California Riverside will test trees in Florida which contain …

March

All In For Citrus Podcast, March 2026

Daniel CooperAll In For Citrus Podcast, Events

The March All In For Citrus podcast previews a couple of events coming in April and May that growers will want to mark on their calendars. Michael Rogers, director of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center (CREC), discusses the Florida Citrus Growers’ Institute scheduled for April 14 at South Florida …

pest

Pest Management Challenges in CUPS

Daniel CooperCUPS, Pests

By Lauren Diepenbrock Citrus under protective screen (CUPS) has provided growers with a profitable method for producing fresh fruit in Florida. Growers who have implemented this system have noted quality fruit production and reduced inputs. However, when changes are imposed to the production environment, they are also imposed to the invertebrate pest complex, which can be either beneficial or detrimental …

ascorbic acid

Study Sheds Light on the Use of Ascorbic Acid With OTC

Daniel CooperHLB Management, Research

Growers have always been innovators, testing new production practices in their groves. When you add a disease like HLB, those experiments get ramped up in the effort to seek solutions. A good example of this was a discussion that began last year among growers that ascorbic acid (vitamin C) might be helpful in extending the effectiveness of the oxytetracycline (OTC) …

patience

Postfreeze Patience Is a Virtue

Daniel Cooperfreeze, Irrigation, Nutrition

Edwin A. Gutierrez-Rodriguez and Jonael Bosques, both with University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Extension, recently explained why patience is an important post-freeze tree management strategy. Following are highlights from the article they wrote. After Florida’s recent freeze event, a common question citrus growers were asking was: “What should I do to recover the trees?” The …

varieties

CITRUS NURSERY SOURCE: Important Details About Newly Available Citrus Varieties

Daniel CooperCitrus Nursery Source, Varieties

By Peter Chaires There are presently two groups of University of Florida (UF) citrus varieties, licensed to Florida citrus nurseries via New Varieties Development & Management Corp. (NVDMC), the licensing designee of the Florida Department of Citrus. These include: GROUP ONE Get more details on group one in the February 2025 Citrus Nursery Source article. GROUP TWO Find more information …

citrus canker

Alternatives to Copper Needed for Citrus Canker Management

Daniel CooperDiseases

Florida citrus producers have long used copper as a way to protect against citrus canker. However, it’s time for growers to have other options. That’s a message shared by Ozgur Batuman, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) associate professor and citrus pathologist at the Southwest Florida Research and Education Center in Immokalee. He spoke on this …

improve

Improve Water and Nutrient Retention With Compost and Biochar

Daniel CooperHLB Management, Soil Health, Tip of the Week

By Tripti Vashisth, Abhishek Neupane and Taylor Livingston Florida citrus trees are under pressure from huanglongbing (HLB). The disease weakens root systems, reducing the tree’s ability to take up water and nutrients. Compounding this issue, most Florida groves sit on sandy soils with very little organic matter. These soils drain quickly, struggle to hold nutrients and allow both water and …

PGR

Match the PGR to the Purpose at the Proper Time

Daniel CooperPGRs

By Tripti Vashisth and Prudhvi Vulchi Plant growth regulators (PGRs) have become an important management tool for Florida citrus growers facing the challenges of huanglongbing (HLB). HLB disrupts the tree’s hormonal balance by reducing growth-promoting hormones like cytokinin and gibberellins and increasing stress-related hormones. This imbalance weakens carbohydrate transport, reduces sink strength and accelerates canopy decline. PGRs can help restore …

control

Pest Control in Protected Production Systems

Daniel CooperCUPS, IPCs, Pests

In a recent virtual presentation, entomologist Jawwad Qureshi discussed monitoring and control measures for citrus pests in trees under individual protective covers (IPCs) and in citrus under protective screen (CUPS). Qureshi is an associate professor at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Southwest Florida Research and Education Center in Immokalee. MONITORING METHODS Qureshi’s noted that …

ambrosia

After Freeze, Ambrosia Beetles Are Potential Threat

Daniel Cooperfreeze, Pests

Florida citrus growers should be on the lookout for an uncommon citrus pest following the recent freeze events that devastated crops throughout the state. During a recent postfreeze webinar hosted by the University of Florida Institute of Food and Agricultural Sciences Citrus Team, Lauren Diepenbrock, associate professor and entomologist, warned growers about the ambrosia beetle. This pest can prey on …

plant defense

Plant Defense To Increase Citrus Performance

Daniel CooperProduction

The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) recently issued an article, Science‑Based Plant Defense So Your Crops Perform Better. The authors are multi-county citrus Extension agent Edwin Gutierrez-Rodriguez and Jonael Bosques-Mendez, a county Extension director. Edited excerpts follow:   ROOTS AND WATER Plant roots are strategic. They possess the structure and ability to alter their growth …

Asian citrus

What To Do About Asian Citrus Psyllids Postfreeze

Daniel Cooperfreeze, Psyllids, Tip of the Week

This winter’s hard freeze may have knocked back visible Asian citrus psyllid (ACP) activity, but research shows the pest is not reliably eliminated by the cold. In lab studies, many ACP adults and nymphs survived several hours at 21 to 23 degrees, and eggs could still hatch after several hours at temperatures as low as 8 degrees. Adults can also …

irrigation

Postfreeze Irrigation and Fertilization for Citrus Trees

Daniel Cooperfreeze, Irrigation, Nutrition

Irrigation and fertilizer applications are important management tools for Florida citrus growers following the recent freeze event in late January/early February. Davie Kadyampakeni, associate professor in soil, water and ecosystem sciences at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), discussed both facets of tree maintenance during a postfreeze webinar hosted by the UF/IFAS Citrus Team. Key …

March

All In For Citrus Podcast, February 2026

Tacy CalliesAll In For Citrus Podcast, freeze

Florida experienced one of the most damaging freezes in more than a decade this winter. The February episode of the All In For Citrus podcast addresses the impacts the freeze had on citrus. Michael Rogers, director of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center, notes that it will take some time …

Postfreeze Recovery Recommendations for Citrus Trees

Tacy Calliesfreeze

Florida citrus growers hoping to expedite the recovery process for trees impacted by the late January/early February freeze event should pump the brakes and wait — at least until spring. That advice is from Muhammad Shahid, assistant professor of horticulture at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS). He shared tree recovery recommendations with growers during …

‘Significant’ Melanose Concerns Following Freeze

Tacy CalliesDiseases, freeze

Freeze damage to Florida citrus could lead to a buildup in certain diseases. One, in particular, is a major threat, believes Megan Dewdney, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) associate professor in plant pathology and Extension specialist. “Our big concern in terms of foliar problems is going to be melanose. Just as a reminder, melanose produces …