CITRUS NURSERY SOURCE: What Florida Citrus Growers Are Talking About

Daniel CooperCitrus Nursery Source

By Peter Chaires When June rolls around, the last of the oranges are generally coming in and it’s time to reassess what worked and identify areas for improvement. Research-based entities are making every effort to steer dollars to where they will have the most immediate impact. The name of the game right now is capacity preservation. We must do what …


Texas Researcher Honored for HLB Work

Daniel CooperAwards, Research, Texas

Texas A&M researcher Kranthi Mandadi has received the 2024 American Phytopathological Society (APS) Syngenta Award given to select scientists working in areas of crop protection and plant pathology. Mandadi is an associate professor in the Department of Plant Pathology and Microbiology at the Texas A&M AgriLife Research and Extension Center at Weslaco. He was selected for the award primarily for his breakthrough research on fastidious, …


Herbicide Application During Rainy Weather

Daniel CooperTip of the Week, Weather, weeds

By Ramdas Kanissery Finding the right time to apply post-emergent herbicides for controlling weeds in citrus groves is challenging in the summer months due to frequent rain. Rainy conditions delay grove maintenance, including herbicide spraying, while also impacting the effectiveness of the herbicides. Monitoring weather forecasts and identifying optimal conditions for herbicide applications can help achieve the best results. Below …


Supporting Citrus Science

Daniel CooperResearch

By Rob Gilbert,, @IFAS_VP Let’s start with the most important thing. Citrus science remains a top priority of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS). Citrus is special. My goal for citrus is sustainability. That means profitability. Here are a few new ways UF/IFAS has demonstrated its support for citrus science during the past five …


Worldwide Orange and OJ Production Declining

Daniel CooperFlorida Citrus Commission, Florida Department of Citrus, Production

Continuing low orange production in Florida has left Florida processors relying significantly on imports to meet the ongoing demand for orange juice (OJ), the Florida Citrus Commission (FCC) was told in June. Economist Marisa Zansler told the FCC that world juice availability is expected to decrease in the 2024–25 season, influenced by the decline in Brazilian production and reduced inventory …


Ways to Cut Postharvest Waste

Daniel CooperInternational, Research

Citrus farming worldwidedelivers an annual 140 million tons of oranges, tangerines and other citrus fruits, but much of the postharvest crop is lost before it reaches the market. “Up to 30% of citrus fruit is lost to decay and disease following harvesting,” says food scientist Yang Shan, a member of the Chinese Academy of Engineering and head of the Dongting …


Brazil’s Harvest+ Reports Progress

Daniel CooperBrazil, Harvesting

Brazil’s Harvest+ project coordinator, Efraim Albrecht, recently traveled to Europe in search of mechanized and semi-mechanized solutions to improve citrus harvesting in Brazil. Harvest+ seeks to establish partnerships with companies that develop equipment and technologies that serve Brazilian orchards. It also seeks to contact universities and research centers that have innovative projects. In Seville, Spain, Move Agro’s coordinator and process …

Active Atlantic Hurricane

Extremely Active Atlantic Hurricane Forecast Maintained

Daniel CooperCitrus, hurricane, Weather

Colorado State University (CSU) hurricane researchers in June maintained their April forecast for an extremely active Atlantic hurricane season in 2024. The maintained forecast for the 2024 season, with the average for 1991-2020 in parentheses, is: The researchers also maintained the probabilities for at least one major hurricane landfall on each of the following coastal areas: “This forecast is of …

gall wasps

Parasites Fight Citrus Gall Wasps

Daniel CooperInternational, Pests

Jianhua Mo, a research entomologist with Australia’s New South Wales Department of Primary Industries (NSW DPI) authored an article about the release of parasitic wasps for the control of citrus gall wasps (CGW). Edited excerpts follow: CGW is a pest of major concern in the southern citrus-growing regions of the Riverina, Sunraysia and Riverland. With the exception of the adult …


Florida Citrus Forecasts Changed

Daniel CooperCitrus, Crop Forecast, Florida

The June 11 federal citrus crop forecast for 2023-24 shows mostly slight changes for all Florida varieties and no production changes in other states. ORANGES The Florida all-orange forecast rose less than 1% from May, or 60,000 boxes, to 17.86 million boxes. That exceeds 2022-23 production of 15.82 million boxes but is far below 2021-22 production of 41.2 million boxes. …

early varieties

Have Questions About Trunk Injection? Ask the Expert for Answers

Daniel CooperHLB Management, OTC Expert

Sponsored Content In this special series, Tom Johnson, owner of TJ BioTech, tackles questions about optimizing trunk-injection applications to treat HLB. Q: Are there any advantages or disadvantages to making a ReMedium TI® Injection in the rootstock or the scion? Tom Johnson: To start, agronomically there is really no difference in a ReMedium TI® injection into the rootstock or the …

herbicide efficiency

How to Improve Herbicide Efficiency

Daniel Cooperweeds

University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) weed scientist Ramdas Kanissery offered numerous tips and observations for improving herbicide efficiency at this spring’s Florida Citrus Growers’ Institute. They included: In addition to discussing herbicides, Kanissery reported that cover cropping, an emergent practice in Florida citrus production, may contribute to longer-term weed management in row middles. Read more …


Pest Management in CUPS

Daniel CooperCitrus Greening, HLB Management, Tip of the Week

By Jawwad Qureshi The Asian citrus psyllid (ACP, Figure 1) continues to feed on citrus trees infected with citrus greening and spread the disease to newly planted young trees. Therefore, it is not possible to produce a healthy citrus tree in an environment where citrus greening is endemic. Only the citrus under protective screen (CUPS, Figure 2) system allows the …


Moving Beyond Greening

Daniel CooperCitrus Greening, Economics

By Tom Spreen When citrus greening was first discovered in Florida, it did not have a profound impact on production. The big news at that time was the multiple hurricanes that had crossed Florida in 2004 and 2005. The hurricanes served to spread citrus canker so sufficiently that the state of Florida was forced to abandon its efforts to eradicate …


Making the Most of Georgia Satsumas

Daniel CooperGeorgia, Mandarins

“The satsuma mandarin industry in Georgia is currently experiencing tremendous growth and economic success, but it also faces many challenges.” That quote from the recent University of Georgia (UGA) Extension publication, Maximizing the Value of Georgia-Grown Satsumas Through Food Innovation, summarizes the state’s citrus industry that is composed primarily of satsuma mandarins. TOO MUCH FRESH FRUIT? The publication by Emma …

HLB resistance

CRDF Focused on the Search for HLB Resistance

Daniel CooperCitrus, Citrus Greening, HLB Management

According to Rick Dantzler, Citrus Research and Development Foundation (CRDF) chief operating officer, the past seven days have been busy for CRDF’s committees. First, the Plant Improvement Committee, chaired by grower Joby Sherrod, reviewed several projects and ideas seeking HLB resistance in detail. A three-year plan for the plant improvement programs for University of Florida Institute of Food and Agricultural …

sterile insect

Sterile Insect Program Supported in South Africa

Daniel CooperInternational, Pests

South Africa’s Western Cape Department of Agriculture has given the country’s Citrus Growers’ Association (CGA) 2 million rands (approximately $109,000) to support the Sterile Insect Technique (SIT) program to suppress false codling moth. False codling moth is a phytosanitary pest affecting export crops such as citrus, table grapes and stone fruit. The support from the provincial government will help expand …

Argentine ants

Fighting Argentine Ants to Assist ACP Biocontrol

Daniel CooperCalifornia Corner, HLB Management, Pests

Agriculture officials and researchers in California have drastically reduced populations of HLB-spreading Asian citrus psyllids (ACP) through biocontrol measures. Now they’re working on ways to control other insects that are intent on protecting the ACP — Argentine ants. Mark Hoddle, professor of Extension in biological control at the University of California, Riverside, Department of Entomology, explained the ACP/Argentine ant dynamics …


Standing Up Against Hurricanes

Daniel Cooperhurricane, Research, Rootstocks

By Ute Albrecht, Bo Meyering, Carol Tardivo, Gabriel Pugina and Kim D. Bowman The approaching hurricane season poses the question of why strong winds cause some citrus trees to topple over while others remain firm in the ground. Grove location, grove topography and soil type are factors that influence a tree’s ability to withstand tropical-force winds. The tree’s root structure …