The Asiatic A strain of citrus canker was recently found in the Upper Gulf Coast area of Texas, posing a significant threat to the state’s commercial citrus production. The U.S. Department of Agriculture (USDA), the Texas Department of Agriculture and the Texas A&M University-Kingsville Citrus Center are collaborating on surveys to detect the disease. They are also removing and properly …
IPCs Help With Diaprepes and Nematodes
Florida citrus growers have known for several years that individual protective covers (IPCs) do a good job of excluding HLB-spreading Asian citrus psyllids from young trees. “But those protective covers also protect from things like Diaprepes abbreviatus,” researcher Larry Duncan told the recent Citrus Expo audience. Duncan is a nematologist at the University of Florida Institute of Food and Agricultural …
Australian Tree Map Tool Honored
The Australian Tree Crop Map Dashboard won first place at the 2021 Esri User Conference. The conference is the world’s largest event dedicated to geographic information system technology. The tool is freely available and interactively summarizes the extent of avocado, citrus, macadamia and mango orchards, banana plantations and olive groves. It helps those industries make informed and timely decisions for biosecurity …
Navel Oranges: Current Status and Future in Florida
By Pete Spyke and Bill Castle Navel oranges are fairly tolerant of HLB, are popular and easy to sell, and offer a stable source of income that is only marginally related to worldwide supply and demand. Nevertheless, the Florida navel orange industry has experienced some tough times recently. Growers are questioning whether it is possible to grow navel oranges profitably …
Where to Find Information About Citrus Research
By Ruth Borger Sometimes when it comes to information shared by University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) faculty, Florida citrus growers may suffer from information overload. There is a lot of good, solid, useful information that growers can use immediately to improve their operations. But how do you sift through it all, and where do you …
Dantzler Still Optimistic Regarding HLB
Citrus Research and Development Foundation (CRDF) Chief Operating Officer Rick Dantzler told a Citrus Expo crowd why he remains optimistic regarding HLB, even in the face of negative industry trends. Dantzler, who started at CRDF on the first day of Citrus Expo three years ago, declared, “I am more optimistic than ever. It is taking longer than I thought, but …
All In For Citrus Podcast, August 2021
This month’s All In For Citrus Podcast gives growers valuable advice for dealing with hurricanes and tropical storms. The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) team describes how to prepare for and recover from these weather events, as well as the impacts they can have on Florida’s economy. Before getting to the information about storms, the …
Yield Predictions Improved by AI
University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers are using artificial intelligence (AI) to help citrus growers better forecast their seasonal yield. A preliminary study showed that the AI technology predicts yields with 98% accuracy. That’s way better than the 75% to 85% accuracy growers get when they count trees manually, said Yiannis Ampatzidis, UF/IFAS associate professor …
Behind Florida’s Production Decline
In addition to recently projecting that Florida orange and red grapefruit production will likely decline for the foreseeable future, economist Tom Spreen provided some of the reasons. OLDER, LESS PRODUCTIVE TREESSpreen, University of Florida Institute of Food and Agricultural Sciences professor emeritus, cited an older tree inventory and declining fruit per tree as contributors to projected yield declines. He said …
Steger Forecast for 2021-22 Florida Orange Crop
Private consultant Elizabeth Steger on Aug. 16 forecast Florida will produce 52 million boxes of oranges in the 2021-22 season — 1.5% less than the 52.8 million boxes produced in 2020-21. Steger projected 20.8 million boxes of early-midseason oranges; that’s less than the 22.7 million boxes produced last season. Her Valencia projection is 31.2 million boxes; that’s more than the …
Chilli Thrips a Potential Problem in CUPS
A modified way of producing citrus in Florida to protect against the Asian citrus psyllid may provide shelter for another pest — chilli thrips. Citrus under protective screen (CUPS) production systems protect against the psyllid and the huanglongbing (HLB) disease the pest transmits. However, according to University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) entomologist Lauren Diepenbrock, the …
Grower: Young Trees Look ‘Outstanding’
In the face of production declines, pest issues and other challenges, multi-county Florida citrus grower David Wheeler of Wheeler Farms found something positive to report. “One bright spot is the health of our young trees,” he said. “They look outstanding and have been on a good program with a rotation of insecticides.” Wheeler Farms’ more mature citrus trees aren’t doing …
Help Trees Handle Heat
Florida citrus production can be significantly impacted during the summertime heat. High temperatures with little to no rainfall can affect trees’ vegetative growth, fruit set and fruit quality, says Amir Rezazadeh, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) multi-county fruit and field crops agent. Heat is a factor that can cause citrus trees to become significantly dehydrated. …
Grower Input Wanted on ‘Greasy Green’ Disorder
The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) is asking Florida fresh citrus growers and packers to complete a brief, anonymous survey about a disorder some call “greasy green.” The symptoms of the disorder are consistent with greasy spot, but a direct causal relationship has not been proven. The disorder may also be related to other possible …
Valencia Grove Design Research Earns Award
Scientists who showed that high-density plantings yield considerably more Valencia oranges, among other findings, have been honored by the American Society for Horticultural Science. Researchers Rhuanito “Johnny” Ferrarezi, Mark Ritenour and Alan Wright won the society’s Outstanding Fruit Publication Award. The University of Florida Institute of Food and Agricultural Sciences researchers work at the Indian River Research and Education Center …
Sparks Attacks Biden Tax Plan
Tax increases proposed by President Joe Biden “would devastate Florida’s citrus industry,” Florida Citrus Mutual CEO Mike Sparks wrote in a recent editorial. The editorial was in The Ledger, a newspaper in Lakeland, Florida. Biden’s proposal would impose a 43% tax on growers when they sell one area of land for another, Sparks stated. Most growers’ assets are in their …
Florida Production Faces Further Decline
Florida orange and red grapefruit production, already at historically low levels, will likely decline for years, according to a leading citrus economist. Tom Spreen, University of Florida Institute of Food and Agricultural Sciences professor emeritus, calculated Florida crop output through the 2031-32 season based on various yield and tree replacement assumptions. Oranges and red grapefruit are Florida’s top-producing varieties. …
Citrus Expo Offers New Information and Experiences
By Jamie Burrow and Ruth Borger Citrus Expo, hosted by AgNet Media with programming support from the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), is being held in person Aug. 18-19 in North Fort Myers. Like in past years, UF/IFAS faculty will be presenting educational sessions on the latest information that growers can use to improve their …
Citrus Canopy Health Is Highly Important for HLB Tolerance
By Amit Levy and Tripti Vashisth In Florida, where almost all citrus trees are infected with huanglongbing (HLB), it is important to have an easy and reliable method to check the severity of the disease. Each tree responds differently to Candidatus liberibacter asiaticus (CLas), the bacterial pathogen that causes HLB. Compare it to COVID-19, where some people had the virus …
UF/IFAS Expo Booth Improved
Growers have always left the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) booth at Citrus Expo with much information they can use in the grove. This year, the UF/IFAS citrus staff hopes to make a visit to the booth even more fruitful. “In the past, we have had two large booths and it has had many posters,” …