By Ariel Singerman and Stephen H. Futch In the 2020–21 citrus season, fruit drop has severely impacted orange yield in Florida. According to a recent U.S. Department of Agriculture (USDA) citrus crop forecast, the estimate of fruit drop for early/mid-season and Valencia oranges was 43% and 34%, respectively. Moreover, according to some growers, the level of fruit drop has been …
The Secret Ingredient of Developing New Citrus Rootstocks
By Bill Castle Creation, evaluation, release and commercial acceptance are dynamic, interactive activities that together constitute new rootstock development. Underpinning each of them is a commonly overlooked and rarely mentioned activity, professional judgment. Yet, it is something everyone has and recognizes as getting better with time and experience. It is a skill developed and refined over time from knowledge of …
Value of Florida’s Citrus Industry Is Up
Despite a decrease in citrus production, the Florida citrus industry contributed more value to the state of Florida in 2019-20 than the previous season. According to a study conducted by the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), the industry had an economic impact of $6.762 billion to the state and supported more than 33,300 jobs. The …
The Goals of Pest Management
By Ajia Paolillo Editor’s note: This article grants one continuing education unit (CEU) in the Core category toward the renewal of a Florida Department of Agriculture and Consumer Services restricted-use pesticide license when the accompanying test is submitted and approved. Integrated pest management (IPM) uses a combination of methods to keep pest populations at an acceptable level, which are economical …
Update on CRISPR Research for Citrus Improvement
By Nian Wang, Fred Gmitter and Manjul Dutt Nearly all commercially important citrus types — oranges, grapefruits etc. — have originated by mutations that have accumulated over several hundreds to thousands of years, from what once was an original, individual sweet orange tree and a single grapefruit tree. The many different cultivars that we know today are descended from those …
Drought and Heat Harm Brazil’s Harvest
By Maurício Mendes There is a saying among those who have been in the industry for a long time: “There is no citrus harvest like the other.” Growers are facing production challenges in the current harvest season in Brazil. HOT, DRY CONDITIONSThe first signs of a decrease in the season’s fruit crop were given by last year’s (August to September …
Texas Grapefruit Sweepstakes Launched
Texas-based grapefruit brand Winter Sweetz announced the launch of its Sweeter in Texas sweepstakes to celebrate the Texas red grapefruit season during the holidays. Consumers may enter the sweepstakes from Dec. 15 to Jan. 15. There will be weekly prizes and a grand prize winner. Every week, two winners will be selected at random to receive a free shipment of …
Fruit Drop Weighs Heavily on Florida Growers
Numerous Florida citrus growers are experiencing heavy fruit drop this fall. “For some growers, it’s the worst fruit drop they have experienced; 50 percent-plus,” says grower Lee Jones with Cross Covered Caretaking. Grower Jim Snively, with Southern Gardens Citrus, said he is hearing talk of around 30 to 50 percent-plus fruit drop. “I’m hearing pick-outs that are 20 percent to …
Parson Brown Research Funded
Researchers looking into the possibility that the old Parson Brown orange might fare better than Hamlins in the face of HLB will be funded by the Citrus Research and Development Foundation (CRDF). CRDF Chief Operating Officer Rick Dantzler said the organization agreed to fund the project for $53,000 during its December meeting. The funding had been under consideration for several …
John Gose: Serving Youth and Industry
Ray Royce readily acknowledges grower and nurseryman John Gose’s many contributions to the Florida citrus industry, including serving “on way too many advisory committees to list.” Gose has even been president of the Highlands County Citrus Growers Association, where Royce is executive director. PROGRAM LEADERSHIPBut it’s not Gose’s work with growers that most impresses the association executive. “I always think …
Grapefruit and Drugs: A Conversation
University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) citrus breeder Fred Gmitter recently had an email conversation with a retired Swedish pediatrician about a UF/IFAS grapefruit and pummelo hybrid that likely won’t interact with drugs. The retired physician, Leif Gothefors, had inquired about Gmitter’s work on the hybrid, UF 914. Gothefors noted that he had heard UF 914 …
Boosting Citrus Tree Immunity to Combat HLB
By Manjul Dutt, Juliana Soares and Jude Grosser Land plants such as citrus are generally anchored to a specific location by their roots. Owing to their immobile nature and constant exposure to pathogenic microbes, plants are very vulnerable. However, you might be surprised by how much plants can protect themselves and survive against multiple adversities encountered during their lifetime. A …
FDOC Offers 2020-21 Citrus Season Outlook
Florida Department of Citrus (FDOC) economist Marisa Zansler recently broke down the expected utilization of the 57 million boxes of oranges Florida is forecast to produce in the 2020-21 season. She also offered projections for utilization of grapefruit and specialty fruit, and made other economic projections in her outlook for the season. ORANGESAbout 96 percent of the orange crop is …
Varieties and Rootstocks Reviewed
In his virtual Citrus Expo presentation, Jude Grosser reviewed varieties and rootstocks showing promise for productivity in the face of HLB. Grosser is a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) plant breeder. His presentation was based on work done by him and fellow UF/IFAS researchers Bill Castle and Fred Gmitter. Grosser said UF/IFAS released OLL-20 “based …
Marketing North Florida Citrus
North Florida growers have planted several citrus groves in recent years. “A lot of those groves are starting to become productive,” Kevin Athearn said during a Sept. 23 Cold Hardy Citrus Association annual meeting, held virtually. Athearn, a regional specialized Extension agent, familiarized new citrus growers with some citrus terminology and suggested possible marketing strategies. “It’s important that we all …
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 …
Florida’s Gift Fruit Industry Remains Resilient
Gift fruit shippers occupy just a small niche in Florida citrus, but the sector’s value to the industry is more than annual sales. For anyone seeking a taste of Florida citrus, regardless of where they are in the United States, gift fruit can be shipped with just a few clicks online or a simple telephone call to a Florida gift …
Growing Finger Limes in Florida: Lessons Learned So Far
By Manjul Dutt and Jude Grosser Finger lime, a distant relative of sweet orange and grapefruit, is a relatively new crop species for Florida. It is an Australian native species that has been gaining in popularity and importance in the last few years because of its unique fruit characteristics and disease tolerance, which sets it apart from conventional sweet orange …
Citrus Grower Ben Hill Griffin III Dies
Citrus grower and cattle rancher Ben Hill Griffin III, 78, of Frostproof, died July 25. Griffin, son of the late Ben Hill Griffin Jr., was president and COO of Ben Hill Griffin, Inc. and a member of the Florida Agricultural Hall of Fame and the Florida Citrus Hall of Fame. He had previously been president and chairman of the board …
How to Use the New Florida Citrus Rootstock Selection Guide
By Rhuanito S. Ferrarezi, William S. Castle, Kim D. Bowman, Jude W. Grosser, Stephen H. Futch, Steve Rogers and Andres Gonzalez First published in 1989 as Rootstocks for Florida Citrus, the work of William Castle and his colleagues remains relevant 30 years later. The purpose of the fourth edition of the Florida Citrus Rootstock Selection Guide is to provide timely …





























