Gibberellic Acid Use: Considerations and Concerns

Tacy CalliesHLB Management, Tip of the Week

By Tripti Vashisth Gibberellic acid (GA) is a naturally occurring plant hormone. GA has been used in citrus production for years to improve fruit set and size, reduce preharvest drop and delay harvest. Recent findings show that monthly foliar application of GA from September to January can improve productivity of HLB-affected Valencia trees. On average, a 30% increase in yield …

citrus greening

Citrus Greening Inevitable for North Florida, South Georgia

Tacy CalliesCitrus Greening

It’s not a question of if citrus greening disease will be an issue for North Florida and South Georgia citrus growers, but when will it be. Fred Gmitter, a University of Florida Institute of Food and Agricultural Sciences citrus breeder, believes the disease’s impact in both areas is inevitable. He shared his assessment during a recent Cold Tolerant Citrus Production …

The Past and Potential of Parson Brown

Tacy CalliesVarieties

By Gary K. England and Manjul Dutt The Parson Brown is an early-season sweet orange that was identified in 1875 by J.L. Carney and named the Carney Parson Brown (CPB). In a 1923 article titled ‘History of the Parson Brown Orange,’ E.L. Carney described how his brother Capt. J.L. Carney sought a sweet orange of acceptable quality for budding onto …

Phytophthora Root Rot a Concern in Georgia Citrus

Tacy CalliesDiseases

A saturated summer across the Southeast means more potential for development of phytophthora root rot disease in citrus trees. The impact on Georgia’s young trees could be devastating, says Jonathan Oliver, University of Georgia assistant professor and small fruits pathologist. Oliver implores Georgia’s citrus producers to stay vigilant with their fungicide sprays, as the wet conditions have not let up. …

PIECES OF THE PAST: Tiller of the Soil

Tacy CalliesPieces of the Past

By Brenda Eubanks Burnette I recently came across this poem in a 1930s book titled “Citrus Growing in Florida” by the Florida Department of Agriculture in a chapter on cover crops: “Would’st have abundant crops reward thy toilAnd fill thy barns, O tiller of the soil?Then ever keep in mind this maxim true,Feed well the land and ’twill in turn …

Making Sense of Biologicals: Seaweed for Citrus Stress Management

Tacy CalliesMSOB

Florida provides an environment conducive to producing a variety of crops 365 days a year. It has beautiful sunshine, an ideal climate and ample rainfall for most of the year. These conditions allow Florida growers to produce some of the best citrus in the world. But Florida citrus is not immune to the harsh realities that can come with growing …

HLB: The Problem for Processors

Ernie NeffProcessing

Many stories have been written about the woes HLB disease has caused Florida’s citrus growers; fewer have been written about the problems HLB causes Florida citrus processors. Kristen Carlson presented the processors’ side of the story during the recent International Citrus & Beverage Conference hosted by the University of Florida Institute of Food and Agricultural Sciences. Carlson is executive director …

Nutrient Recommendations

The Fate of Phosphorus in Florida Citrus Soils

Ernie NeffNutrition, soil

Multi-county citrus Extension agent Chris Oswalt discussed the fate of phosphorus in Florida citrus soils in the September Extension newsletter, Citrus from the Ridge to the Valley. Excerpts from his article follow. The amount of phosphorus in soil is closely related to the potential availability of this phosphorus to plants … Potentially available soil forms of phosphorus are dependent on …

Florida Break-Even Yields and Prices

Tacy CalliesEconomics, Tip of the Week

By Ariel Singerman For processed oranges grown in Southwest Florida during 2020–21, the estimated cultural costs were $1,508 per acre. Total costs of production were $1,882 per acre. Those estimates are down $214 per acre compared to the previous season. This is the result of growers reducing costs across all grove programs, except for fungicides and irrigation. Such a cutback …

Cover Crops Can Benefit Citrus

Ernie NeffCover Crops

Cover crops, which are not planted for harvest and sale, offer numerous potential benefits to Florida citrus growers. The benefits and additional information were addressed in a presentation offered at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) booth at Citrus Expo in August. The crops can improve the physical, chemical and biological properties of the soil. …

phytophthora

Brown Rot Management Advice

Ernie NeffDiseases

University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) multi-county citrus Extension agent Ajia Paolillo discussed brown rot management in the September Extension newsletter, Citrus from the Ridge to the Valley. Her article follows. As we move into September, it is essential to remember that brown rot can impact yield, especially early varieties. Brown rot is caused by either …

areas

UGA Lab Offers Free Testing for Citrus Greening

Tacy CalliesGeorgia

The University of Georgia (UGA) Plant Molecular Diagnostic Lab is a key resource for Georgia citrus growers hoping to stay sustainable. While it is a fee-based service lab for the UGA Department of Plant Pathology, it provides free testing for citrus producers concerned about citrus greening, says Jonathan Oliver, UGA assistant professor and small fruits pathologist. “The diagnostic lab here …

marketing

Florida Citrus BMPs: Update and Suggestions

Ernie NeffBMPs

Work on finalizing a newly revised citrus best management practices (BMPs) manual has slowed, and that’s a good thing, according to Highlands County Citrus Growers Association (HCCGA) Executive Director Ray Royce. In a recent HCCGA newsletter article, he stated that a number of issues, especially related to nutrient management and application efficiency, need to be better understood. “It is the …

Lessons on Yield and Root Health From Modified Nutrition

Tacy CalliesNutrition

By Davie Kadyampakeni, Evan Johnson, Kelly Morgan and Ali Atta Citrus production in Florida has been decreasing over the last 15 years due to several factors, with huanglongbing (HLB) a major driver. This disease has severe effects on citrus growth and production, including stunted vegetative growth, misshapen small fruits and poor color development, root mortality, stunted branches, excessive fruit drop, …

New Fruit Crop Agent in Florida

Ernie Neffextension

Brandon White became the new commercial fruit crop agent for Lake and Orange counties on Aug. 16, working at the Lake County Extension office in Tavares. White was born and raised in Florida and lives in Ocoee. “Not having grown up in agriculture, I have been in it to some capacity for over a decade since I changed my major …

Impact of High-Density Planting and Enhanced Nutrition on HLB-Affected Grapefruit

Tacy CalliesNutrition

By Rhuanito S. Ferrarezi, Waqar Shafqat, Hernan Soto, Mark Ritenour, Lorenzo Rossi,Davie Kadyampakeni, Evan Johnson and Kelly Morgan Florida citrus growers have been using high-density planting and different soil and foliar fertilizer application strategies to compensate for the adverse effects of huanglongbing (HLB). Recent studies indicate that high-density plantings and enhanced nutritional programs with higher micronutrient levels, such as the …

Insurance Improvements for Citrus From USDA

Ernie Neffcrop insurance

The U.S. Department of Agriculture’s (USDA) Risk Management Agency (RMA) recently announced improved and expanded insurance options for citrus growers and others. 2022 CHANGES FOR FLORIDANext year, Florida producers will be able to insure several citrus commodities under an Actual Production History Plan that offers advantages over the existing Florida Citrus Fruit Dollar Plan. This product provides individualized coverage based …

acp

Psyllid Management Key for Georgia Growers

Tacy CalliesGeorgia, HLB Management

The Asian citrus psyllid (ACP) is not yet well established in Georgia. University of Georgia (UGA) assistant professor and small fruits pathologist Jonathan Oliver wants to keep it that way. The ACP vectors citrus greening disease (HLB), which has decimated Florida’s citrus production. Oliver encourages producers to scout their groves regularly to avoid a similar fate happening in Georgia. “It’s …

greening

Seeking Microbes for Disease Control

Ernie NeffResearch

The next key to winning the battle against citrus diseases such as citrus canker may be in the tiniest microbes that live inside the citrus tree.  University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers hope to discover how these microbes may benefit citrus trees in their natural fight against diseases. The end result may be an environmentally …

FDOC

Florida Citrus Acres and Crop Value

Ernie NeffAcreage

Florida’s citrus acreage declined another 3% in 2021, to 407,348 acres, the U.S. Department of Agriculture’s National Agricultural Statistics Service (NASS) reported Sept. 8. That’s the lowest level since the NASS started keeping track of the acreage in 1966. ACREAGE DETAILSThe net loss of 12,104 acres is 955 acres more than was lost last season. New plantings at 10,448 acres …