Growers know the negative impacts of any kind stress on trees infected by HLB. That raised a question: Can injury from herbicides make fruit drop worse? Ramdas Kanissery, an assistant professor of weed science with the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), conducted a research project to help answer that question. Kanissery discusses the research in …
Progress With SuperSour Rootstock Trials
By Kim D. Bowman The breeding of new citrus rootstocks is not an endeavor for the impatient. Two of the most popular rootstocks in Florida, US-942 and US-812, each were included in field evaluation for more than 20 years before the U.S. Department of Agriculture (USDA) released them for commercial use. In these cases, the time invested in thorough testing …
Australia Evaluating Dwarfing Rootstocks
Tahir Khurshid of Australia’s New South Wales Department of Primary Industries (NSW DPI) is leading a project evaluating several overseas rootstocks budded to a range of mandarin and sweet orange varieties. One of the components is evaluating the rootstocks for their dwarfing effect, which will potentially produce small trees for high-density planting systems for the citrus industry. Size-controlling rootstocks have …
Are Finger Limes the ‘Next Big Thing?’
Will Florida finger limes be the “next big thing,” or will they show mediocre or poor performance in the commercial market? That’s a question two University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers hope to answer. Trent Blare and Fredy Ballen, both with the Tropical Research and Education Center in Homestead, discussed their work in a virtual …
Oak Leaves and Turnpike Signs
Citrus growers Travis Murphy and Tom Thayer developed a formulation based on oak leaf extract that was observed to rejuvenate trees back to economic productivity. But the rejuvenation effects observed in the growers’ trials were not observed in field trials using a modified version of the formulation. U.S. Department of Agriculture (USDA) research geneticist Randall Niedz reported that result in …
Heritage Practices for Today’s Challenges
By Brad Turner Cover cropping and composting in Florida citrus production are not new concepts. Our ancestors understood the basic principles and implemented these practices just a couple of generations ago. YESTERDAY AND TODAYAs a boy, I can remember an old citrus grower telling me how beggarweed and crotalaria, both native nitrogen-fixing legumes, growing wild in neighboring fields would be …
Hurricane Season Is Here. Are You Prepared?
By Amir Rezazadeh Every year, hurricanes and tropical storms can occur in Florida from June 1 to Nov. 30. Hurricanes and tropical storms damage citrus trees by blowing fruit off trees or from flooding due to too much rain or high tides. Also, high tides due to wind may cause rising water levels and saltwater flooding. The best practice for …
International Partnership Strengthens HLB Research
Brazil’s Fundecitrus reported that the exchange of international researchers and technicians working on the PRE-HLB (Preventing HLB Epidemics for Ensuring Citrus Survival in Europe) project strengthens research on the disease. In recent months, Fundecitrus received a researcher from the University of Amsterdam (Netherlands) and sent a researcher to the University of Valencia (Spain). Counting on the expertise of more than …
Finger Limes Introduced for Florida
Two recently released University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) varieties of finger limes were introduced at a virtual Finger Lime Symposium held in March. Manjul Dutt of the UF/IFAS Citrus Research and Education Center hosted the symposium; he also introduced the new varieties. Lourdes Pérez Cordero, UF/IFAS Extension agent in Highlands County, reported on the new …
Fruit Flies Are Major Cause of Fruit Drop in Brazil
Brazil’s Fundecitrus recently pointed out that fruit flies, along with citrus fruit borers, are primarily responsible for the country’s citrus fruit drop. The organization suggested that monitoring and management must be taken to avoid economic damage, since fruit flies occur throughout the year. Fundecitrus described the fruit flies that cause damage in Brazil and suggested control measures. Two species of …
Lebbeck Mealybug on the Move in Florida Groves
In the May episode of the All In For Citrus podcast, Lauren Diepenbrock, an entomologist with the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), discusses her research on the lebbeck mealybug. The pest was first identified in Florida in the Boynton Beach area in 2009 in a natural habit. “It was not until 2019 that we found …
Brazil’s First Orange Forecast for 2022–2023
The 2022–2023 initial orange crop forecast for Brazil’s São Paulo and West-Southwest Minas Gerais citrus belt is 316.95 million boxes. The forecast was published on May 26 by Fundecitrus and its cooperators. The projected volume is 20.53% higher than the previous crop, which totaled 262.97 million boxes. The orange production forecast includes:• 59.48 million boxes of Hamlin, Westin and Rubi• …
New SWFREC Director Named
Michael Burton has been named the next director of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Southwest Florida Research and Education Center (SWFREC). He’s scheduled to start at the Immokalee facility on July 1. Burton recently served for 17 months as proxy for the dean of Missouri State University’s William H. Darr College of Agriculture. He …
Program to Provide HLB-Tolerant Trees
The Florida Citrus Commission (FCC) on May 18 received an update on a propagation program intended to quickly produce and commercialize trees showing tolerance or resistance to HLB disease, also known as citrus greening. The program will focus on the Donaldson tree and other escaped trees. The Donaldson is a tree at the U.S. Department of Agriculture’s Whitmore Farm that …
Use Physical Barriers for Root Health
By Larry Duncan Citrus trees in Florida soils infested with diaprepes root weevil (Diaprepes abbreviatus) or sting nematode (Belonolaimus longicaudatus) frequently contend with devastating damage to their root systems. This is made even worse by root loss due to huanglongbing (HLB) disease. Where soil conditions are conducive to the insect or nematode, it is very difficult to prevent major economic …
Update on CRDF Research Projects
The Citrus Research and Development Foundation (CRDF) Research Management Committee and board of directors recently approved projects for funding. The first CRDF research project has approval for funding of a final year of research by the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) to study the lebbeck mealybug and its management. “The Research Management Committee debated this …
High Summer Temperatures Take a Toll on Trees
By Anirban Guha and Christopher Vincent A quick body temperature test is common these days before entering many workplaces, hospitals and clinics due to the ongoing COVID-19 pandemic. The purpose is to screen people for fevers, usually with a non-contact infrared thermometer. Measurement of plant body temperatures also has become common for many field crops, not to screen for infectious …
ACP Found at Packinghouse and Juice Plant in California
The California Department of Food and Agriculture (CDFA) recently urged all citrus industry members to be extra vigilant in their Asian citrus psyllid (ACP) mitigation steps and adherence to regulatory practices. The request is in response to ACP detections in the Central Valley over the last few weeks. ACP is the vector of HLB disease. Multiple ACP were detected on …
Representatives Ask for HLB Pesticide Approval
U.S. Representatives Kat Cammack and Al Lawson led members of the Florida congressional delegation to ask the U.S. Environmental Protection Agency (EPA) for expeditious approval of Vismax, a biochemical pesticide for HLB. A letter from the representatives asks the EPA to rapidly approve the use of Vismax in preventing HLB so the industry may access this product before the start …
Uncle Matt’s Organic Launches Low-Calorie OJ
Uncle Matt’s Organic recently announced the launch of its Matt50 orange juice beverage. Matt50 contains half the sugar and calories of regular orange juice and is boosted with Vitamin C, prebiotics, probiotics, calcium, potassium and folate. Susan McLean, Uncle Matt’s Organic vice president of marketing and innovation, said Matt50 contains just 50 calories per serving. It is sweetened with organic stevia, a …