Research Update on Oxytetracycline Injection for HLB Management

Josh McGill HLB Management, Research

By Ute Albrecht The German scientist Paul Ehrlich pioneered the research for “magic bullets” — chemicals that could kill a microorganism but did not harm the patient. He also coined the term “chemotherapy” and paved the way for developing synthetic drugs. The first synthetic antibiotic (the first sulfa-type antibiotic) to successfully treat human bacterial diseases without major side effects was …

The Push for Pruning in Brazil’s Dense Groves

Josh McGill Brazil, Pruning

Due to major problems with pests and diseases, Brazilian producers have adopted alternative practices, such as dense planting, Fundecitrus’ Citricultor magazine recently reported. These practices reduce costs, increase yield and achieve a faster return on investment. As a result of this trend, new production practices are needed to improve management, including the frequent pruning of trees, which is essential in …

Seeking Injection Alternatives and Additions

Josh McGill CRDF, HLB Management, Research

The Citrus Research and Development Foundation (CRDF) approved three new projects during its September board of directors meeting. The projects will test the injection of different antimicrobial materials to treat HLB. One project will be managed by Ozgur Batuman, a citrus pathologist with the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS). Another will be run by Kranthi …

Improved Lebbeck Mealybug Detection

Josh McGill Pests

The U.S. Department of Agriculture-Agricultural Research Service (USDA ARS) scientists and research partners have found a faster, safer and less expensive way for growers to detect the invasive lebbeck mealybug. A recent study published in Journal of Applied Entomology describes their work. The lebbeck mealybug (Nipaecoccus viridis) feeds on and damages various citrus fruit and ornamental plants. The invasive species …

Biopesticide Products Patented

Josh McGill Pesticides

Research by Rhodes University PhD graduates Tamryn Marsberg and Michael Jukes has led to the patent of two viral-based products. MultiMax and CodlMax are alternatives to chemical pesticides on citrus, apples and litchi. The advantage of these products includes their lack of non-target effects; the pest is controlled without harming the environment. The products could assist with control of the …

Reasons for Less Argentine Lemon Production

Josh McGill Crop Forecast, International, lemons

Fresh lemon production in Argentina in 2022–23 is forecast to decline to 1.65 million metric tons (MMT), down from 2.1 MMT the prior year, the U.S. Department of Agriculture Foreign Agricultural Service (USDA FAS) reported recently. The decline is due to the impact of rising costs, which have prompted smaller producers to limit the maintenance needed on lemon-bearing trees and …

Citrus Production Guide Available at Expo

Josh McGill Citrus Expo, Production

The 2023–2024 Citrus Production Guide will be available to growers at the Citrus & Specialty Crop Expo in Tampa on Aug. 16–17. The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) publication includes the latest technical advice on HLB management, tree nutrition, grove management and other aspects of Florida citrus cultivation. The guide is a comprehensive reference meant …

A Guide to Safe, Effective Pesticide Use

Josh McGill CEU, Pesticides

By Danielle S. Williams 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. Pesticides are vital tools in agriculture that help protect crops from pests and diseases. Pesticide use must be managed …

Another Attempt to Bring Back Aldicarb

Josh McGill Pesticides

Pesticide-maker AgLogic has asked the Environmental Protection Agency (EPA) to approve use of the pesticide aldicarb on Florida oranges and grapefruit, the Center for Biological Diversity reported. The center, which opposes the approval, says it is dedicated to the protection of endangered species and wild places. The EPA approved a similar aldicarb request in the waning days of the Trump …

Greasy-Green Research Update

Josh McGill Diseases, Research

University of Florida Institute of Food and Agricultural Sciences researchers Megan Dewdney, Mark Ritenour, Liliana Cano, Eva Mulandesa and Monty Myers recently provided an update of their greasy-green disorder research. Excerpts follow from the Indian River Citrus League’s River Ramblings publication: “Greasy green” is a term applied to fruit that develop what appears to be greasy spot rind blotch symptoms …

Safeguarding Citrus From Heat Stress

Josh McGill Tip of the Week, Weather

By Amir Rezazadeh Rising temperatures and climate change challenges of recent years have brought a significant threat to citrus trees. Heat stress, caused by prolonged exposure to high temperatures, poses a severe risk to citrus trees. Excessive soil evaporation, inconsistent rainfall and poor soil water-holding capacity can make trees even more sensitive to heat. High temperatures result in shortened internodes, …

What To Do When You’ve Been Exposed to a Pesticide

Josh McGill CEU

By Matt Smith 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. “In retrospect, I would rather have been a poet. Or a farmer.” Instead, British Special Air Services Agent John Patrick …

Seeking Environmental Stewards

Josh McGill Awards, Environment

The Florida Farm Bureau Federation County Alliance for Responsible Environmental Stewardship (FFBF CARES) is seeking nominations of farmers and ranchers who are implementing best management practices (BMPs) to enhance and conserve the state’s natural resources. Nominations will be accepted through June 16. Farmers and ranchers may nominate their own operation or that of a colleague. Learn more about the program and …

Organic Juice Company Reports Earth-Friendly Practices

Josh McGill Industry News Release, Organic

In celebration of Earth Day on April 22, Uncle Matt’s Organic described how it uses numerous environmentally friendly practices. The company said use of cover crops in its groves helps control weeds and promotes healthy soil. The complex root systems from the cover crops nurture robust biodiversity in the soil. This ecosystem provides water retention, nutrient availability and carbon capture. …

CRDF Funds Project to Arrest HLB Bacteria

Josh McGill CRDF, Research

At the latest Citrus Research and Development Foundation (CRDF) board of directors meeting, funding was approved for a project by Robert Turgeon. He is a professor of plant biology at Cornell University. “Dr. Turgeon is considered by some to be the world’s foremost expert on phloem physiology. If his project succeeds, it could solve our problem with HLB,” CRDF chief …

Orange Light: New Name for Uncle Matt’s Product

Josh McGill Industry News Release, Orange Juice, Organic

Uncle Matt’s Organic is reintroducing its Matt50™ Orange Juice (OJ) Beverage as Orange Light. Orange Light contains half the sugar and calories as regular OJ. It is boosted with vitamin C, plus prebiotics and probiotics for gut health and immune support. Orange Light is available at Whole Foods Market and Sprouts Farmers Market locations nationwide and is also available for purchase directly …

Legal Arguments Start Over Streptomycin in Citrus

Josh McGill Legal, Pesticides

The Ninth Circuit Court of Appeals was scheduled to hear oral arguments in late January challenging the U.S. Environmental Protection Agency’s (EPA) approval of the antibiotic streptomycin as a pesticide on citrus crops. The lawsuit, brought by farmworker and public-interest groups, argues the use of streptomycin on citrus crops is unlawful under the Federal Insecticide, Fungicide, and Rodenticide Act and …

Ever-Changing MRLs for Fresh Citrus Exports

Josh McGill Export, Pesticides

By Mark A. Ritenour Modern production practices for fresh fruits and vegetables usually include the use of various preharvest and postharvest chemicals, some of which are pesticides. Legally, these materials must be labeled for use on specific crops and may only be used according to label instructions. Chemical residues on fruits and vegetables are monitored by industry and regulators to …

Sustainable Citrus Group Meets in Brazil

Josh McGill Brazil, Research

Researchers, professors and representatives of institutions participating in a sustainable citrus project recently visited Brazil’s Fundecitrus for a progress meeting. The project is Sustainable Citrus Culture Through the Controlled Release of Antibacterial Compounds From Formulations Based on Microgels. The project aims to develop sustainable technologies for the protection of citrus and as an alternative to copper, which is recognized as …

The Essential Elements of Reset Management

Josh McGill planting, Tip of the Week

By Mongi Zekri For maximum efficiency of a grove, it is essential that every location is occupied by a tree and that every tree is healthy. Prompt replacement of dead and declining trees means higher average long-term returns from the grove. If the declining trees remain in the grove, they keep getting weaker and yield less fruit each year. Therefore, …