cold-hardy

Cold-Hardy Citrus Harvest Begins Early

Daniel CooperCold Hardy, Harvesting

The anticipated disappointment has become a reality for cold-hardy citrus growers; satsuma mandarins are in short supply. The predominant citrus variety grown in the region will not have much of a crop this season as harvests have already begun across the cold-hardy region of North Florida, South Georgia and South Alabama. As expected, citrus volume will be short, mostly due …

fruit drop

Dual-Action Approach to Mitigate Preharvest Fruit Drop

Daniel CooperFruit Drop, HLB Management, Tip of the Week

By Taylor Livingston and Tripti Vashisth Preharvest fruit drop is a major concern for Florida citrus growers, especially in groves affected by huanglongbing (HLB). Environmental stressors such as drought, flooding and cold snaps further accelerate fruit drop and tree decline. Recent field trials in Central Florida evaluated the use of plant growth regulators (PGRs) — specifically gibberellic acid (GA3) and …

citrus rootstock

Agromillora Introduces New Citrus Rootstock

Daniel CooperResearch

Agromillora, in collaboration with the Valencian Institute of Agricultural Research (IVIA), has introduced CIVAC-19, a new citrus rootstock. CIVAC-19 is the result of more than a decade of research between IVIA and Agromillora. It is a hybrid rootstock of Citrus reshni (Cleopatra mandarin) and Poncirus trifoliata (trifoliate orange). Its semi-dwarfing nature provides medium vigor, key for maintaining compact canopies and …

CRISPR

Taking a Closer Look at CRISPR in Citrus Breeding

Daniel CooperBreeding, Research

By Manjul Dutt Editor’s Note: This is the second article in a series outlining how genetic technology can be using in citrus breeding. Traditional methods for improving citrus, such as crossbreeding different varieties, can be time-consuming due to the creation of a random mix of genes from both parents through a process called genetic introgression. In the article last month, …

citrus canker

Citrus Canker Detection in Alabama

Daniel CooperDiseases, Regulation

Citrus canker, a federal and state regulated plant disease, has been detected in Mobile County, Alabama. As required by federal law, the Alabama Department of Agriculture and Industries (ADAI) will establish a citrus canker quarantine for the county. The Auburn University Plant Pathology Lab confirmed the first detection from foliage and fruit samples collected during ADAI’s routine citrus survey. The …

NuCitrus

NuCitrus Shows Strong HLB Tolerance

Daniel CooperHLB Management, Varieties

University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers are putting genes from a non-citrus plant into Hamlin oranges to develop citrus plants that fight huanglongbing (HLB), also known as citrus greening disease. The newly developed plant is called NuCitrus. It’s based on a protein called Arabidopsis NPR1 (AtNPR1). The new citrus shows strong tolerance to HLB, but not …

brassinosteroids

Planning This Season’s Use of Brassinosteroids for Better Juice Quality

Daniel CooperHLB Management, Tip of the Week

By Fernando Alferez and Divya Aryal Brassinosteroids (BRs) are a class of plant growth regulators with several effects on plant growth and development. They engage in crosstalk with other hormones like auxin, gibberellins, ethylene and abscisic acid, influencing all plant growth and development aspects including fruit maturation, but the timing of this effect appears to be short and tightly regulated. …

improve

Two Practices to Improve Citrus Production

Daniel CooperCold Hardy, Production

University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers recently explained the benefits of raised bed planting and mulching to improve citrus tree establishment, productivity and resilience against environmental stress. Assistant Professor Muhmmad Shahid and Postdoc Scholar Shahid Iqbal, both of the North Florida Research and Education Center, and Associate Professor Davie Kadyampakeni of the Citrus Research and …

government shutdown

Top Concern of Citrus Industry Amid Government Shutdown

Daniel CooperLabor

The potential absence of a legal workforce may be the greatest adverse impact the government shutdown has on Florida’s citrus industry, Florida Citrus Mutual (FCM) Executive Vice President and Chief Executive Officer Matt Joyner stated Oct. 31. Joyner said reports indicate that the Florida industry for the first time in years is “seeing real movement in the right direction” as …

spray drift

Using Pesticides Safely

Daniel CooperCEU, Pesticides

By Mongi Zekri 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. A minimum score of 70% is required to receive credit. Pesticides should not be considered the first line of defense against …

irrigation

Irrigation and Nutrient Management for Improved Tree Productivity

Daniel CooperIrrigation, Nutrition

By Davie Kadyampakeni, Alisheikh Atta, Jonas Pereira de Souza Junior, Christopher Vincent and Tripti Vashisth Typically, citrus water requirements are low in the winter and spring due to cooler temperatures but peak in summer and early fall due to rising temperatures. Thus, improved irrigation management is critical in these times of the year for improved production. Because most citrus trees …

field day

Millennium Block Field Day Set for Nov. 6

Daniel CooperEvents, Indian River, Varieties

The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Indian River Research and Education Center (IRREC) will host its annual Millennium Block Field Day Nov. 6 from 9 a.m. to noon. The field day will showcase the center’s emphasis on research to find a solution to citrus greening disease. The IRREC is located at 2199 South Rock Road …

November

Sneak Peek: November 2025 Citrus Industry

Daniel CooperSneak Peek

Coming soon in the November issue of Specialty Crop Grower magazine are several articles geared to citrus growers. The Citrus Industry section of the magazine addresses a range of topics, including irrigation and nutrient management, CRISPR breeding efforts, momentum and research projects for the Florida 2025–26 citrus season and more. One of the best ways to keep HLB-infected trees productive …

bed system

Bed System Benefits Citrus Production

Daniel CooperCold Hardy, Production

A bed system used in citrus groves is still under research at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) North Florida Research and Education Center (NFREC) in Quincy. But one researcher is already convinced that the system, which includes fabric mulch, is beneficial for growers. “This system is better for them. It’s already being used in …

contamination

How to Avoid Herbicide Contamination Issues

Daniel CooperPesticides, Tip of the Week

By Ramdas Kanissery Even a small amount of leftover herbicide in the spray tank can harm citrus trees. Contamination often occurs when the same sprayer is used on trees of different ages without being cleaned properly between applications. It can also happen when the sprayer is used for other pesticide products without a thorough rinse. Herbicide residues from certain herbicide …

CUPS research

Let’s Chat About CUPS

Daniel CooperCUPS, Technology

Citrus under protective screen (CUPS) continues to spread across the Florida landscape. The practice is allowing growers to produce high-yielding and high-quality fruit. Roughly 1,500 acres are now planted under screen in Florida. MEET CUPSchat Arnold Schumann, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) professor of soil, water and ecosystems sciences, pioneered CUPS research in Florida. His …

shutdown

FFVA Urges H-2A Processing During Government Shutdown

Daniel CooperLabor

The  Florida Fruit & Vegetable Association (FFVA) recently urged the U.S. Office of Management and Budget to authorize the U.S. Department of Labor (USDOL) to continue processing H-2A labor certifications during the government shutdown. An Oct. 17 letter from FFVA Director of Labor Relations Jamie Fussell stated that delays in H-2A certifications caused by the shutdown imminently threaten agricultural production, …

momentum

Keeping the Momentum Going

Daniel CooperFlorida Citrus Commission, Florida Department of Citrus

Florida Citrus Commission (FCC) Chairman Steve Johnson recently cited ways the Florida Department of Citrus (FDOC) has been helping keep momentum going for Florida citrus. During the Sept. 23–26 International Citrus and Beverage Conference, Marisa Zansler (FDOC director of economic and market research) gave a citrus outlook and marketing update to key stakeholders in the beverage market. The overarching message …

changes

Changes to Mexfly Quarantines in Texas

Daniel CooperPests, Regulation, Texas

The U.S. Department of Agriculture Animal and Plant Health Inspection Service (APHIS) and the Texas Department of Agriculture (TDA) have made several recent changes to Mexican fruit fly (Mexfly) quarantines in Texas. DONNA REMOVED On Sept. 10, the agencies reduced the Donna Mexfly quarantine in Hidalgo County by 66 square miles, including 945 acres of commercial citrus. The amended quarantine …