Millennium Block

Millennium Block Research Update

Daniel CooperIndian River, Rootstocks, Varieties

Flavia Zambon, assistant professor with the University of Florida Institute of Food and Agricultural Sciences, recently provided an update about Millennium Block research at the Indian River Research and Education Center. The block, established in 2019–20, is a large-scale, 5,500-tree trial seeking HLB-tolerant citrus varieties. Zambon says some varieties in the trial are showing strong fruit attributes without the need …

weeds

The Harm Weeds Do

Daniel Cooperweeds

Before HLB, canker and diaprepes root weevils became major problems for Florida citrus growers, weeds were among the constant and major annoyances in groves. Even with the pests and diseases growers have faced over the past five decades, the need for weed control may be as important, and costly, as ever. A University of Florida Institute of Food and Agricultural …

fire ant

Fire Ant Management

Daniel CooperPests, Tip of the Week

By Lauren Diepenbrock Red imported fire ants (Solenopsis invicta), commonly referred to as fire ants, are found throughout Florida. This pest infests a broad range of habitats, including urban regions, natural areas and production fields. In citrus, there are a range of impacts from this pest — from human health to both direct and indirect tree impacts. From a human …

nitrogen application

Optimizing Nitrogen Applications in North Florida

Daniel CooperCold Hardy, Nutrition

Four University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) horticulture researchers recently wrote an update in the Cold Hardy Citrus Connection about optimizing citrus nitrogen applications in North Florida. The authors are Muhammad A. Shahid, Davie Kadyampakeni, Shahid Iqbal and Muhammad Nadeem. The following edited excerpts explain the research project and provide conclusions: THE RESEARCH The need for …

tree

Bridging the Gap to the Tree of the Future

Daniel CooperEvents, HLB Management

The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center hosted an OJ Break seminar on May 14. The speakers provided updates on developing a gene-edited citrus tree with resistance to HLB and how growers can use existing tools to mitigate the disease. Nian Wang, UF/IFAS professor, provided an update on the status of …

spinach

Spinach Peptides Provide Defense Against HLB

Daniel CooperHLB Management

Texas A&M AgriLife Research scientists have developed an approach to countering the citrus disease HLB as well as zebra chip disease in potatoes and other vegetables. Their method uses spinach antimicrobial peptides, known as defensins, which naturally defend plants against a broad range of pathogens. Their study results were recently published in the Plant Biotechnology Journal. The effects show significant …

pest

CUPS: Pest Monitoring and Management

Daniel CooperCUPS, Pests, Tip of the Week

By Jawwad A. Qureshi Several insect pests and mites colonize citrus crops in traditional open orchards. Most pests are localized and are suppressed by predators, parasitoids and entomopathogens to levels that are not economically damaging to the crops. The Asian citrus psyllid (ACP) is the primary vector of huanglongbing (HLB) disease. Despite biological and chemical control of ACP, growing a …

mites

Management of Mites for Fresh Market Citrus

Daniel CooperCold Hardy, Pests

University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Associate Professor Xavier Martini recently wrote an article In the Cold Hardy Citrus Connection about management of mites for fresh market citrus. Martini is an entomologist at the North Florida Research and Education Center. An edited version of his article follows.  Two types of mites mainly affect citrus production in …

Snail Management

Snail Management Can Be Complex

Daniel CooperPests, Tip of the Week

By Lauren Diepenbrock Snail management is becoming a more common discussion in Florida citrus with the arrival of a newer species in the Southeast. The snail of concern is Bulimulus bonariensis, previously referred to as Bulimulus sporadicus (Figure 1). Over the past three years, the first emergence of newly hatched snails was noted in late April through early May. The …

management

Developing Snail Management Programs in Florida Citrus

Daniel CooperFlorida, Pests, Research

By Lauren Diepenbrock and Nicole Quinn In recent years, a new pest has been added to the ever-evolving scope of pest management in Florida citrus: Bulimulus bonariensis snails. These snails, also referred to as ghost snails or peanut snails, were reported to be clogging irrigation jets in Central Florida in 2020 in limited locations. Now, in 2025, they have spread …

PGRs

PGRs Can Produce Remarkable Results

Daniel CooperAll In For Citrus Podcast, PGRs

Tripti Vashisth, associate professor of horticultural sciences with the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), has been studying the use of plant growth regulators (PGRs) to improve citrus tree health and fruit retention for several years now. Her work has culminated into a systems approach of when to use a particular PGR at a certain time …

rules

Rules and Regulations of Pesticide Use

Daniel CooperCEU, Pesticides

By Alissa Hevesh 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 are regulated to ensure the safety and well-being of the …

artificial intelligence

CITRUS NURSERY SOURCE: How Artificial Intelligence Applications Could Enhance Nurseries

Daniel CooperCitrus Nursery Source, Technology

By Peter Chairs The University of Florida Institute of Food and Agricultural Sciences’ (UF/IFAS) commitment to the use and development of artificial intelligence (AI) in production agriculture is fueling conversations throughout the citrus industry. For most of us, AI was not even on our radar a few years ago. Today, commercial and nursery growers are excited about the development of …

Citrus Growers’ Institute

Florida Citrus Growers’ Institute Put Researchers Under One Roof

Daniel CooperEvents, Research

The 2025 Florida Citrus Growers’ Institute had a different setup compared to previous years. Scientists from the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) convened at South Florida State College in Avon Park on April 8 to share research that will help shape the future of the Florida citrus industry. Chris Oswalt, UF/IFAS citrus Extension agent who …

biosolids

Biosolids: The Scoop on Processed Poop

Daniel CooperRegulation, Tip of the Week

By William Mitchell, Taylor O’Bannon and Michelle Danyluk Biosolids, sometimes referred to as sewage sludge, are a primarily organic solid product produced by wastewater treatment processes. These organic solids are often used as an inexpensive soil amendment to enhance soil quality. KNOW THE RULES AND RISKS The Food Safety Modernization Act (FSMA) Produce Safety Rule (PSR) prohibits the use of …

May

Sneak Peek: May 2025 Citrus Industry

Daniel CooperEvents, Pests, Sneak Peek

The May issue of Specialty Crop Grower magazine is where to find the latest Citrus Industry articles. If your grove is in Florida, there’s a good chance ghost snails have haunted your trees and irrigation equipment. An article from University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) assistant professors Lauren Diepenbrock and Nicole Quinn offers some advice on …

citrus seminars

Citrus Seminars Provide Research Updates

Daniel CooperEducation, Florida Citrus Show

Researchers from the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) and U.S. Department of Agriculture (USDA) delivered several presentations to a standing-room-only audience during the citrus seminars at the Florida Citrus Show in March. VARIETIES AND ROOTSTOCKS The citrus session began with a breeder panel discussing research on varieties and rootstocks. Participants were Manjul Dutt and Jude …

nitrogen

Nitrogen Reduction Needed in Cold-Hardy Citrus Region

Daniel CooperCold Hardy, Nutrition

Growers in the cold-hardy citrus region are applying too much nitrogen to their groves. Muhammad Shahid, assistant professor of horticulture at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), discovered that unfortunate reality while conducting a research project in North Florida. Most citrus growers were following recommendations in the UF/IFAS Florida Citrus Production Guide, which are mostly …

diaprepes root weevil

Improving Diaprepes Root Weevil Management

Daniel CooperPests

By Maegan Beatty During a recent citrus insect management workshop at the Citrus Research and Education Center, Larry Duncan, University of Florida Institute of Food and Agricultural Sciences professor, addressed diaprepes root weevil management. This Caribbean pest was introduced to Florida in the 1960s. The adult pests feed and lay eggs in citrus tree canopies. The larvae feed on roots …