 |  |  |  |  |  |  |  |  |
Below you'll find a list of all posts that have been categorized as “Nutrition”
Severe pruning combined with enhanced foliar nutrition did not prove cost-effective. By Monica Ozores-Hampton, Fritz Roka, Robert Rouse and Pamela Roberts Citrus trees affected by huanglongbing (HLB) become diminished, weak and develop dieback resulting in reduced production. Decline in fruit yield ultimately prevents economically acceptable commercial citrus production. Pruning and spraying foliar nutritionals are two practices being considered to restore …
A Dinuba, California-based company specializing in plant nutrition has developed a phone app that helps growers identify and treat crop nutrient deficiencies. The company — Nutrient Technologies, Inc. — has been manufacturing and selling agricultural fertilizer products since 1986 in the Central Valley and throughout California, specializing in citrus crops. The app, called Crop Nutrient Advisor, shows photos of plants …
By Tripti Vashisth Mineral nutrition plays an essential role in a plant’s life cycle and is critical for its growth and development. Since the early 19th century, the importance of mineral nutrition for plants has been recognized, and fertilization has become an important aspect of crop production. At least 17 mineral nutrients are considered essential for plants. These include carbon, …
By Pete Spyke, Joby Sherrod and Jude Grosser Part 1 of this article, published in the April 2017 issue of Citrus Industry magazine, provided some background information on controlled-release fertilizer (CRF) along with a discussion of practical applications in citrus production. This article, part 2, includes summaries of observations from several case studies in which CRF has been applied for …
Tripti Vashisth, a University of Florida/Institute of Food and Agricultural Sciences horticulturist, reports on brassinosteroid and nutrient uptake studies aimed at alleviating HLB symptoms. She reported on these studies at a recent HLB Grower Day summarizing scientific presentations made at an international HLB research conference. The brassinosteroid (a plant growth regulator) study was conducted at the University of Havana in …
Recent studies shed light on foliar nutrient and irrigation practices. By Kelly T. Morgan and Said Hamido Most citrus growers are well aware that citrus greening (HLB) is one of the most devastating citrus diseases in many parts of the world. The disease is widespread in Florida, Texas, Brazil, Mexico and other major production areas, causing significant concerns about the …
By Jim Graham and Kelly Morgan Huanglongbing (HLB), greening and yellow shoot are names for the most devastating citrus disease in the world. Symptoms of HLB include a distinctive chlorotic mottle on fully expanded leaves. Infected shoots are stunted, and branches gradually die back as the symptoms appear in other sectors of the tree canopy. HLB reduces fruit size, weight …
The topic of nutrition takes center stage in the May issue of Citrus Industry magazine. Part two of an article co-authored by growers and a researcher presents case studies on how controlled-release fertilizer can boost the health of HLB trees. Also included in the May issue is an update on grower citrus nutrition trials being conducted by University of Florida. …
By Pete Spyke, Joby Sherrod and Jude Grosser Editor’s note: Look for part 2 of this article in the May 2017 issue of Citrus Industry magazine. Part 2 will present case studies using controlled-release fertilizer. Until now, most growers have considered controlled-release fertilizer (CRF) to be primarily for use on young trees, especially resets in existing groves. There is increasing …
By Christopher Vincent I recently spent a morning with a grower who was trying to find out how efficient his citrus fertility program was. His fertilizer practices were carefully considered combinations of granular fertilizer and fertigation based on foliar sampling and yield history. We were there to observe some European consultants who were measuring mineral nutrient levels in the root …
Several Florida growers recently have said that groves in the Gulf citrus region of Southwest Florida are looking better than most groves in the state. Additionally, statistics indicate production in the Gulf region exceeds production in the state as a whole. Multi-county citrus Extension agent Mongi Zekri, who represents the Southwest/Gulf region, was recently asked why the Gulf was doing …
Several growers participating in a forum in Sebring on March 9 said trees are looking better this year than last year. They also agreed that postbloom fruit drop (PFD), a major problem last season, has not yet been a big issue this season. Grower Aaron Himrod of Himrod Citrus Nursery, a forum participant, says good tree condition and high fruit …
Agronomist Oscar Ruiz with Waypoint Analytical, one of the key presenters at a recent soil testing seminar in Sebring, discusses the importance and basics of soil sampling. “Soil testing is very important,” Ruiz says. “It gives you a baseline for your general soil fertility at the beginning of the cropping cycle. Based on that soil report, you can gauge approximately …
University of Florida researcher Jude Grosser, best known for his work on citrus breeding, has become a champion of micronutrients to improve root health and battle HLB. At a recent Highlands County OJ Break, he discussed the use of micronutrients, including why he got involved. “I guess just like any farmer, you don’t like watching your plants get sick and …
Rhuanito “Johnny” Ferrarezi, a new citrus horticulture scientist at the Indian River Research and Education Center near Fort Pierce, discusses his research plans. “I’m going to be focusing on irrigation, plant nutrition and cultural practices to improve our current practices and try to maximize plant survival under greening conditions,” he says. Most of his attention will be on Indian River …
The Georgia Citrus Association (GCA) will hold its annual meeting February 27 in Tifton, Georgia. The meeting will be conducted from 9 a.m. to 3 p.m. at the University of Georgia (UGA) Tifton Campus Conference Center. GCA Vice President Andy Jackson expects more than 100 to attend the meeting, including growers and exhibitors. Topics will include crop diversification, packing and …
A handful of citrus growers discussed January bloom and postbloom fruit drop (PFD), bactericides, nutrition and replanting strategies at a grower forum in Sebring on January 12. Laurie Hurner, Highlands County Extension director and citrus Extension agent, summarizes the discussions. “We are looking at areas where we’ve got bloom coming on. That is a little bit nerve-wracking for January,” Hurner …
University of Florida horticulturist Arnold Schumann recently discussed new ways growers might better manage citrus nutrition. During the Citrus Nutrition Day at the Citrus Research and Education Center, he spoke about the potential future use of a Diagnosis and Recommendation Integrated System (DRIS) that he’s working on. He also addressed the benefits and results of hydroponics in citrus nutrition management. …
Central Florida citrus grower Vic Story tells why he’s participating in grower nutrition trials being conducted by University of Florida researcher Tripti Vashisth, and urges other growers to participate. “We need to look at some of the varying programs that the university has proposed in practical, out-in-the-grove situations over a period of time,” Story says. “I’m measuring these programs against …
Citrus grower Paul Fabry discusses grove practices that led to a huge increase in production in a newly acquired Basinger grove in just a few seasons. The grove has approximately 750 net acres. “Two years ago when we first got the grove, it was in a shape that needed some renovation and I was advised by several prominent industry leaders …
