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 …
Match the PGR to the Purpose at the Proper Time
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 …
Pest Control in Protected Production Systems
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 …
After Freeze, Ambrosia Beetles Are Potential Threat
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 To Increase Citrus Performance
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 …
What To Do About Asian Citrus Psyllids Postfreeze
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 …
Postfreeze Irrigation and Fertilization for Citrus Trees
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 …
All In For Citrus Podcast, February 2026
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
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
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 …
Planning Spring Snail Management
By Lauren M. Diepenbrock Many citrus growers in Florida have been impacted by Bulimulus bonariensis (previously referred to as Bulimulus sporadicus) since the first reports of this pest in groves in 2020. This snail is an ongoing challenge and, with funding from the Citrus Research and Development Foundation, the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) has …
Remember To Remove Stakes After Tree Establishment
It’s a good practice to support young trees with stakes, but the stakes should be removed once the trees are established. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) multi-county citrus Extension agent Edwin A. Gutierrez-Rodriguez tells why in a slightly-edited article: It is commonly accepted that when establishing a new citrus grove or caring for young trees, …
Postfreeze Psyllid Populations Reduced
Southeast citrus growers hoping that the Feb. 1 freeze would wipe out the Asian citrus psyllid (ACP) population are going to be disappointed. “What we do know about freezes is a lot of time they will reduce or delay the buildup of many of the populations of pests that we worry about,” said Lauren Diepenbrock, University of Florida Institute of …
CRDF Board Funds Plant Transformation Projects
In January, the Citrus Research and Development Foundation (CRDF) board of directors took up several projects aimed at plant transformation to improve HLB disease resistance in plants. MANJUL DUTT The board voted to fund work by Manjul Dutt, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) assistant professor of horticultural sciences, to graft the most promising non-genetically modified …
Millennium Block HLB Findings Expected This Year
Fruit harvested at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Millennium Block from 2022 to 2026 will help determine the effectiveness of potential solutions to HLB. This season’s fruit will be harvested through early February, and research results are expected later this year. The Millennium Block was planted in 2019 at the UF/IFAS Indian River Research …
Survey Seeks to Quantify Florida Freeze Damage
The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) is asking Florida agriculturists to participate in a postfreeze damage assessment survey. The survey seeks information about the cumulative impacts of all freeze events that have impacted an operation in 2026. The survey requests the general location of the operation (county/ZIP code), commodity specific details including total acreage, affected …
Expected Freeze Effect on Flowering
Tripti Vashisth, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) associate professor of horticultural sciences and citrus Extension specialist, was part of a question-and-answer session that the UF/IFAS Statewide Citrus Team held for growers last week prior to the weekend’s winter storm. She talked about how low temperatures and high winds could impact citrus flowering. She expressed hope …
Impacts of Freeze on Fruit Quality
Florida citrus growers are in the middle of harvest season. That means plenty of fruit was still left on the trees prior to last weekend’s winter storm that brought freezing temperatures and dangerous wind chills to the state’s citrus-producing regions. Growers are assessing the negative impacts following the freeze, but they may not know the extent of damage for a …
When and How To Use Silicon for Freeze Protection and Recovery
By Muhammad A. Shahid and Davie Kadyampakeni Silicon (Si) is getting a lot of attention from citrus growers as a tool to help trees handle stress, especially during cold and freeze conditions. It toughens up plant tissues, strengthens cell walls and helps trees better handle stress when it is applied at the right time. BEFORE FREEZE The most important thing …
OLL Orange Varieties Revisited at Griffin’s Grove
Last September, Jason Griffin hosted a field day in his citrus grove near Lake Alfred in partnership with the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS). The event was well attended, and some growers requested a second field day when the crop was closer to harvest. Griffin and UF/IFAS hosted a second event in late January as …





























