By Tripti Vashisth In a multi-year field trial, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers have seen beneficial effects of gibberellic acid (GA) on Valencia sweet oranges. Monthly application of GA (September to January) on Valencia improved yield on average by 30%, reduced fruit drop and elicited enhanced plant defense response. These benefits are possibly due …
Florida Growers Report Early-Season Obstacles
By Frank Giles The U.S. Department of Agriculture (USDA) reported a drop in estimated Florida orange production in its December crop update. That estimate lowered production by 1 million boxes from the initial forecast of 47 million boxes reported in October. In advance of USDA’s January estimate, Florida citrus growers discussed how their crops are progressing. Here’s what they had …
How Fast is CLas? Scientists Now Know
For the first time, scientists have been able to measure the speed of the Candidatus Liberibacter asiaticus (CLas) bacteria that causes HLB disease. CLas are injected into citrus trees by psyllids feeding on the trees’ sap. CLas relies on this sap to grow and spread throughout trees. Using a new statistical modeling analysis and measurement approach, plant pathologists were …
Freeze Damage: Preparation and Recovery
By Amir Rezazadeh Low temperatures can cause serious injury to leaf, wood and fruits of citrus trees. An extended freeze can kill a citrus tree. A rapid temperature decrease or a longer duration of freezing temperature can worsen the damage. Because preparation is paramount in protecting citrus trees, growers should use the Florida Automated Weather Network. The network provides information …
Orange Quality and Quantity in Turkey
The fresh orange yield in Turkey for 2021-22 is forecast to increase 40% to 1.82 million metric tons (MMT) due to favorable rainy weather conditions, the U.S. Department of Agriculture’s Foreign Agricultural Service (FAS) reported. However, in recent months, producers have become concerned about drought conditions affecting the quality of the fruit. In 2020-21, Turkey produced 1.3 MMT of oranges. …
Pest Management: A New Approach to an Age-Old Challenge
By Brad Turner From a family with deep Florida roots, I have over 40 years of experience in commercial citrus production. I learned the industry from the ground up by working in the family groves while studying citrus production at Florida Southern College. I have owned a citrus nursery, my own groves and a citrus caretaking business. I have also …
Making Sense of Biologicals: An Alternative to Managing Premature Fruit Drop
One instance of fruit drop is expected and needed every growing season for Florida citrus producers. A second instance, however, is unexpected, unwanted and just what growers do not need right before harvest time. HLB WORSENS DROPBut that is a scenario Florida citrus growers encounter every year. This problem has only worsened in the era of citrus greening disease, also …
Rancid Oranges Aid Detection of Diseases
A University of Sydney researcher is developing a cancer and serious disease-detecting biomedical probe that can be made from the juice of rancid oranges. Called a nanobiosensor — a tiny probe that uses fluorescence to signal cells’ pH in terms of their acidity or alkalinity — it detects whether cells are at risk, or in the early stages of cancer …
USDA Conducting Voluntary Yet Vital Study
The U.S. Department of Agriculture’s (USDA) National Agricultural Statistics Service (NASS) is conducting the 2021 Farm Producer Study to gain knowledge and understanding of agricultural producers and help USDA improve services to them. A brief questionnaire was mailed to approximately 75,000 U.S. agricultural producers across the country. The questionnaire, which takes no more than 10 minutes to complete, asks participants …
Shining the Light on Tree Health
At a University of Florida Institute of Food and Agricultural Sciences Extension citrus field day held earlier this month, plant pathologist Amit Levy talked with growers about ways to evaluate tree health. “A good evaluation should be correlated to the yield that the trees will produce,” explained Levy. “The evaluation should be concentrated on the tree health, and not on …
Updated Brazilian OJ Projection
The total Brazilian frozen concentrated orange juice (FCOJ) 65 Brix equivalent production for 2021-22 is projected at 1.123 million metric tons (MMT). That projection, which is an increase of 16% compared to orange juice production for 2020-21, was made by the U.S. Department of Agriculture’s Foreign Agricultural Service (FAS). The São Paulo industry is expected to process 265 million …
Limiting Pesticide Exposure
By Ajia Paolillo When we are caught up in the everyday routine of our jobs, it can be easy to forget some essential safety precautions that all agricultural employees should be taking. All agricultural employees could be exposed to pesticides while working in a grove. Proper training is essential to ensure employees understand the risks associated with their jobs and …
Gibberellic Acid Label Concerns Allayed
University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers have found that gibberellic acid (GA) applications can improve productivity of HLB-affected Valencia trees. But some growers are concerned that the GA label may not allow that use. Citrus Research and Education Center Director (CREC) Michael Rogers allays that concern. Rogers says some are concerned “because the recommendations that …
PIECES OF THE PAST: Orange Surprise
By Brenda Eubanks Burnette This past summer, I drove up to Asheville, North Carolina, and was able to visit Biltmore Estate, the largest privately owned home in the nation. Officially opened on Christmas Eve of 1895, George Vanderbilt’s “country home” contains over 4 acres of floor space, including 35 bedrooms, 43 bathrooms and 65 fireplaces. As I browsed through the …
The Case for Sugar Belle® in OJ
A pitch for potentially using the HLB-tolerant Sugar Belle® mandarin hybrid in orange juice (OJ) has been made by University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers. A brief presentation titled, “Potential of Using HLB-Tolerant Sugar Belle® in Orange Juice Processing and Effects on Consumer Preference,” is available for viewing. Slides in the presentation indicate that a …
Flavor Summit Returns in February
After a year’s postponement because of the COVID-19 pandemic, the University of Florida is hosting the 2022 Flavor Summit – Industry Perspectives on Feb. 22-24. Industry professionals are invited to attend and learn about the science behind flavor. The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center (CREC) and the UF Center for Smell …
New H-2A Wages Effective Dec. 29
A recent issue of the Florida Citrus Mutual Triangle newsletter provided information about the wage that growers must pay H-2A labor, effective Dec. 29. H-2A workers are foreign agricultural workers who are allowed to work in the United States temporarily. In recent years, the vast majority of Florida citrus has been harvested by H-2A workers. The Employment and Training Administration …
Groundcovers, Water Use and Yield
Indian River Research and Education Center (IRREC) scientists are evaluating whether fabric mulch groundcovers can reduce water use in groves without compromising yield. A recent video shot during lemon harvest in a Scott Citrus Management Grove describes the research. IRREC is a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) facility in Fort Pierce. The researchers are evaluating …
Grapefruit Issues Tackled by Mutual
The Florida Citrus Mutual (FCM) Triangle newsletter recently updated efforts to have the federal government rescind an action that suspended the juice content requirements on imported grapefruit. In early October, the domestic grapefruit industry was made aware of a “patch” that the U.S. Department of Agriculture (USDA) had issued in April of this year suspending the juice content requirements on …
Now Is the Time for Dormant Season Sprays
By Lauren Diepenbrock Pest management is an ongoing effort in Florida citrus. Taking advantage of pest life cycles, whether they are tied to the season or plant phenology, can make management efforts have greater impacts on pest populations. For many citrus growers, managing impacts of Asian citrus psyllid (ACP), the vector of huanglongbing (HLB), is part of the annual management …