fertilization

Greening Study: Extra Fertilization Doesn’t Increase Yield

Daniel Cooper Brazil, HLB Management, Nutrition

A study carried out by Brazil’s Fundecitrus in partnership with the Agronomic Institute (IAC) showed that additional fertilization of orchards had no effect on increasing the production of trees with citrus greening. The research was conducted in well-nourished adult orchards with a low incidence of greening. Results were published in January in the journal PhytoFrontiers of the American Society of …

fertilization

PIECES OF THE PAST: Reflections on Fertilization

Daniel Cooper Nutrition, Pieces of the Past

By Brenda Eubanks Burnette In his book, “The Cultivation of Citrus Fruits,” first published in 1926 by The MacMillan Company, H. Harold Hume covers a variety of topics, including the use of fertilizers and the different needs of young trees versus bearing trees. Following are insightful excerpts: “Young adult trees differ in their fertilizer requirements. Young trees use their food …

therapies

Nutrition Remains a Critical Element as New Therapies Roll Out

Daniel Cooper Nutrition

Growers have largely adopted new trunk-injection therapies to fight the effects of HLB in citrus groves. In addition, plant growth regulators have helped improve tree health and fruit retention. One University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) scientist reminds growers to maintain their fertilizer programs as the new therapies are deployed.  Davie Kadyampakeni, UF/IFAS associate professor of …

february

All In For Citrus Podcast, February 2024

Daniel Cooper All In For Citrus Podcast, Nutrition

Florida citrus growers are now well into their second application of oxytetracycline (OTC) via trunk injection to treat HLB. Per the label of both registered OTC products, after two applications, there is a one-year treatment pause. So, growers will be formulating plans on what to do during the off-season for OTC-treated trees. That was the subject of discussion during the …

citrus greening

New Light Shed on HLB and Fertilization

Tacy Callies HLB Management, Nutrition

The effort to help huanglongbing (HLB)-impacted citrus trees has taken another step forward. A University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) study examined the relationship between fertilization, root health and fruit yield. Researchers focused on Valencia orange trees with HLB. Associate Professor Davie Kadyampakeni led the effort at the UF/IFAS Citrus Research and Education Center. The study, …

Sticking to a Solid Production Plan

Tacy Callies Nutrition, Production, Soil Health

Matthew Machata grew up in Polk County on the family’s citrus farm, Rolling Meadows Ranch Groves in Lake Wales, Florida. After he graduated high school, he joined the Marine Corps and served two tours in Iraq. He then attended Auburn University, where he earned a degree in aerospace engineering. At the time, his plans didn’t include farming, but that changed …

HLB-affected

Root Nutrient and Fertilization Guidelines for HLB-Affected Trees

Daniel Cooper Nutrition, Tip of the Week

By Davie Kadyampakeni, Lorenzo Rossi and Alan Wright  Huanglongbing (HLB) disease lowers tree performance by reducing water and nutrient uptake as a result of root loss. HLB-affected trees have a fibrous root loss of about 30% to 80%, which increases as disease symptoms develop in the canopy. Investigating optimal nutrient concentrations in citrus roots thus improves the understanding of HLB …

Improve Fruit Yields and Juice Quality

Josh McGill Nutrition, Pest Management, Tip of the Week

By Davie Kadyampakeni and Megan Dewdney The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) conducted a six-year project to determine if plant nutritional fertilizer sources coupled with specific crop protection chemicals help mitigate citrus diseases. This project was conducted on a 5-acre commercial citrus grove block near the Citrus Research and Education Center (CREC) in Lake Alfred. …

Optimize Zinc and Potassium Applications to Prevent Fruit Drop

Josh McGill Fruit Drop, Nutrition, Tip of the Week

By Fernando Alferez, Daniel Boakye, Murillo De Sousa and Pablo Orozco After HLB was first detected in Florida, increase in disease-associated preharvest fruit drop in affected trees has significantly reduced grower returns. Fruit drop is normal in healthy citrus, accounting for 10% to 15% of the total crop. However, under endemic HLB conditions and depending on the variety, crop loss …

Breeder Advice on Nutrition, Scions and Rootstocks

Josh McGill Nutrition, Rootstocks, Varieties

Citrus breeder Jude Grosser recently shared tips on tree nutrition and discussed some scion/rootstock combinations that should work well for trees producing juice oranges. NUTRITIONGrosser became very interested in citrus nutrition several years ago in an effort to keep his newly bred trees healthy in the face of HLB. The University of Florida Institute of Food and Agricultural Sciences professor …

Silicon Recommendations for Citrus

Josh McGill Cold Hardy, Nutrition

A University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researcher recently wrote an article about silicon that included recommendations for its use. The article by Muhmmad Shahid, assistant professor of horticulture, appeared in the UF/IFAS Cold Hardy Citrus Connection newsletter. Silicon’s benefits may include improved yield, a strengthened root system and tolerance to abiotic stress, including cold. Excerpts …

Nutrition and Irrigation Role Reinforced for HLB Trees

Josh McGill Irrigation, Nutrition

In a virtual seminar for growers on July 19, Davie Kadyampakeni reinforced that optimal, balanced nutrition and frequent irrigation can improve HLB-affected citrus trees, yield and fruit. Kadyampakeni is a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) associate professor at the Citrus Research and Education Center in Lake Alfred. NUTRITION“Citrus fruit yields, juice quality and canopy size …

Managing Micronutrients in HLB-Affected Trees

Josh McGill Nutrition, Tip of the Week

By Davie Kadyampakeni Nutrients are needed for optimal tree growth, fruit yields and juice quality. Any nutrient deficiencies could result in low yields and decreased revenue, so it is essential to make sure citrus trees receive adequate nutrient supplies at all times. Micronutrients, though required in minute quantities, are especially important for citrus trees impacted by citrus greening. Examples of …

Critical Minerals Bill Seeks to Secure Fertilizer Supplies

Josh McGill Legislative, Nutrition

Four members of Congress have introduced a bill to include phosphate and potash on the final List of Critical Minerals of the U.S. Department of the Interior. The U.S. representatives are Kat Cammack of Florida, Barry Moore of Alabama, Elissa Slotkin of Michigan and Jimmy Panetta of California. “A nation that cannot feed itself is not secure,” Cammack said. “Without …

Silicon Could Benefit Florida Citrus

Josh McGill Nutrition, Production

There has been much focus on the benefits of applications of plant growth regulators like gibberellic acid and 2,4-D, and more recently oxytetracycline hydrochloride to improve the health of citrus trees infected with HLB. Silicon also has been highlighted for its potential benefits to citrus. Mohammad Adnan Shahid, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) assistant professor, …

Fertilizer Institute Pushes Policy Priorities

Josh McGill Biostimulants, Nutrition

The Fertilizer Institute (TFI) recently released its 2023–2024 Public Policy Priorities for working with the Biden administration, regulatory agencies and Congress. TFI’s priorities are broken down into seven key areas: “Fertilizer is a globally traded commodity and heavily influenced by geopolitical events,” said TFI President and Chief Executive Officer Corey Rosenbusch. “Over the past two years, we have seen major …

Getting the Most Out of Your Nutrition Program

Josh McGill Nutrition

By Brandon White Taking a wholistic, helicopter view of nutrient management programs can be beneficial in reducing high input costs and environmental implications in the continued era of HLB. START WITH THE SOILAn obvious first stop on the considerations list is the soil. It’s the foundation of the system. Almost any economically feasible thing growers can do to improve organic …

CUPS Irrigation and Fertilization for Grapefruit

Josh McGill CUPS, Nutrition, Tip of the Week

By Rhuanito S. Ferrarezi and Mark A. Ritenour Citrus under protective screen (CUPS) is a modern production system that excludes the Asian citrus psyllid and, consequently, the devastating disease citrus greening (huanglongbing or HLB) from plants cultivated in screenhouses. A recent study investigated the effect of different irrigation management strategies on fruit yield and quality of grapefruit grown in CUPS. …

Nutrient Uptake Potential of Rootstocks

Josh McGill Nutrition, Rootstocks

The objective of a new study published in HortScience was to evaluate and understand the nutrient uptake potential of citrus rootstocks. Conducted by University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers, it is one of the first citrus studies to report nutrient uptake efficiency and the potential of rootstocks. The information presented in the study can be …

BMP Updates Highlighted at Workshop

Josh McGill BMPs, Nutrition, Water

The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) hosted a water and nutrient management workshop at the Citrus Research and Education Center in mid-February. In addition to seminars, a grove tour was provided to demonstrate a nutrient-rate trial currently underway at the center. Kelly Morgan, UF/IFAS professor of crop nutrition, spoke on recent activity to update citrus …