Citrus Research and Development Foundation (CRDF) directors on Sept. 22 had a lengthy discussion about a nutrition research proposal from Rhuanito (Johnny) Ferrarezi. Ferrarezi is a University of Florida Institute of Food and Agricultural Sciences assistant professor at the Indian River Research and Education Center. Because of budgetary concerns expressed by CRDF, Ferrarezi cut $158,000 from his original proposed project …
Sneak Peek: October 2020 Citrus Industry
Get the dirt on soil in the October 2020 issue of Citrus Industry magazine! Soil is not the most glamorous subject, but it’s one that seems to be getting more attention in the citrus industry lately. As citrus growers work to keep trees productive in the HLB era, they are implementing practices to improve soil health. Providing roots with a …
Needle-Assisted Trunk Infusion for Trees
With the devastating impacts of HLB on the citrus industry, growers are seeking alternative solutions to reduce Candidatus Liberibacter asiaticus (the bacteria that causes HLB) levels in trees and prevent disease-induced decline. Researchers at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) are developing an automated method for delivering therapeutic liquid materials into the vascular tissue of citrus …
All In For Citrus Podcast, September 2020
National recognition, new findings on black spot control, and research on antimicrobial peptides highlight the September episode of the All In For Citrus podcast. Citrus Research and Education Center Director Michael Rogers starts the episode with the announcement that the University of Florida was ranked in the top 10 of U.S. News and World Report’s Top Public Schools list. Rogers …
Growers Sustain Losses
Not many watching a recent virtual Citrus Expo presentation were surprised by Ariel Singerman’s declaration that “taking into account total cost, on average, growers sustained a loss” in the 2019-20 Florida citrus season. Singerman, a University of Florida Institute of Food and Agricultural Sciences economist, pegged the average per-acre losses at $1,606 for early-midseason oranges and $1,254 for Valencias. Singerman …
Peptide Could Restore Florida Citrus
CghSAMPa, the peptide found in the fruit of greening-tolerant Australian finger limes, is believed to be the first substance capable of controlling huanglongbing (HLB, also known as citrus greening). University of California, Riverside and Invaio Sciences, Inc. have partnered to advance the peptide research with hopes of bringing an HLB solution to commercialization by 2023. During a recent seminar hosted …
Genetics and Nutrition Are the ‘Way Forward’
“The combination of improved scion/rootstock genetics and optimized nutrition is clearly the way forward” for Florida’s HLB-stricken citrus industry, Jude Grosser declared in a Florida Citrus Growers’ Institute virtual presentation. Grosser is a University of Florida Institute of Food and Agricultural Sciences plant breeder. The Growers’ Institute is normally held in April but was cancelled this year due to COVID-19. …
Organic Solutions to Citrus Greening Sought
The Organic Center is currently working with the University of Florida, the University of California, Riverside, and several citrus growers and industry members to conduct a national review of how citrus greening disease is impacting organic growers and other industry members. The information will be used to develop a large-scale holistic research project proposal targeted toward protecting organic citrus growers from citrus …
Nutrition: Get the Rate Right
Davie Kadyampakeni emphasized the importance of the four Rs of good nutrition of HLB-affected orange trees, with a heavy focus on the “right rate” of nutrient use. The other three Rs are right time, right placement and right source of nutrient applications. Kadyampakeni, a University of Florida Institute of Food and Agricultural Sciences researcher, discussed nutrition at this year’s virtual …
Gibberellic Acid: Increase Fruit Size and Yield, Reduce Drop
By Tripti Vashisth and Megan Dewdney This article discusses the use of gibberellic acid (GA), the naturally occurring plant hormone, on huanglongbing (HLB)-affected trees. The results were generated from a 3-year trial in which Valencia trees were treated with GA in the fall. The outcomes suggest that GA can be effectively used for synchronizing and suppressing profuse flowering without negatively …
Pest Management Under Bags
Many Florida citrus growers in recent years have used individual protective covers (IPCs), often referred to as “bags,” for pest management, especially to protect young trees from HLB-spreading Asian citrus psyllids. Lauren Diepenbrock addressed the benefits and challenges of IPCs at this year’s virtual Citrus Expo. Diepenbrock is an assistant professor of entomology at the University of Florida Institute of …
AI Will Be Another Tool for Citrus Greening
Artificial intelligence (AI) will likely help growers and researchers cope with citrus greening (huanglongbing, known as HLB) and other citrus problems over the long run. That’s the belief of J. Scott Angle, the new head of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS). Angle, UF’s vice president for agriculture and natural resources, says AI is a …
CRAFT Cycle Two Deadline Is September 4
Time is running out for commercial citrus growers in Florida to apply to participate in Cycle Two of the Citrus Research and Field Trial (CRAFT) program. The deadline to apply is Friday, Sept. 4. The application process is open to growers with a minimum of 20 acres of planned solid-set or reset plantings. Cycle Two of CRAFT covers up to …
Sneak Peek: September 2020 Citrus Industry
In just two days, more than 1,100 Citrus Expo participants viewed 28 educational videos. If you didn’t get a chance to visit the virtual Citrus, Vegetable & Specialty Crop Expo on Aug. 19–20, you can find highlights from the event in the September issue of Citrus Industry magazine. The educational videos will remain on the Citrus Expo website through the …
Root Architecture, Propagation Method and Citrus Tree Growth
By Ute Albrecht, Sameer Pokhrel and Kim D. Bowman The rootstock has received increased attention as a management strategy to alleviate the devastating effects of HLB. In commercial citrus nursery production, rootstocks are typically propagated by seed. This is possible because citrus produces polyembryonic seeds with nucellar embryos, which develop into plants that are genetically identical to the mother plant. …
New UF/IFAS Plant Breeding Website
Fred Gmitter, a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) professor of breeding and genetics, has released several mandarin citrus varieties. Most recently, he released the Marathon variety in 2018. The citrus fruit’s ability to hang onto the tree for an extended period led researchers to give it the Marathon moniker. Gmitter is one of numerous scientists …
Mutual Testifies on OJ From Mexico
Florida Citrus Mutual Executive Vice President and CEO Mike Sparks recently testified to federal officials regarding the effects of orange juice (OJ) imports from Mexico. His testimony to the United States Trade Representative (USTR), the U.S. Department of Commerce (USDOC) and the U.S. Department of Agriculture (USDA) was part of a larger hearing on trade with Mexico and the U.S. …
Infected ACP Found in California Commercial Grove Is No Surprise
For the first time, an Asian citrus psyllid (ACP) carrying the bacteria which causes huanglongbing (HLB) was found in a commercial grove in Riverside County. While the discovery has prompted concern, University of California Riverside Extension Specialist Monique Rivera said that the find has been expected and is not all that surprising. “We’ve had positive trees removed here in Riverside, …
Weird Trunk Disorders in Groves
Florida growers, Extension agents and others have been baffled by unusual trunk symptoms during what Evan Johnson termed “the year of the weird trunk disorder.” Growers spotted the disorders, which were similar to phytophthora, in groves over the past one and half to two years. Johnson addressed three of the disorders, which have been found in multiple counties. Johnson, a …
Area-Wide Pest Management of Florida Citrus
Ariel Singerman, University of Florida assistant professor, made an online presentation during the recent Agricultural and Applied Economics Association annual meeting. He shared his research on the implementation of area-wide pest management throughout the state of Florida. “Diminishment of pest populations by farmers on their own farm is the most widely used strategy for pest control. However, this is compromised …





























