By Ramdas Kanissery Florida citrus growers face weed management problems throughout the year because of conditions that favor rapid weed growth in groves. A weed-free tree row is desired in a citrus grove to minimize weed competition with trees. Hence, chemical weed control using post-emergent, systemic herbicides like glyphosate has become a vital production practice in the Florida citrus industry. …
Managing Pest and Predatory Mites in CUPS
By Emilie Demard Mites are pests of economic importance in traditional groves and citrus under protective screen (CUPS). Results from a two-year survey in CUPS at the Indian River Research and Education Center (IRREC) in Fort Pierce, Florida, showed that the citrus rust mite and the citrus red mite populations can reach high levels resulting in leaf and fruit damage. …
New Advancements in Herbicide Spraying
By Ramdas Kanissery, Yiannis Ampatzidis, Mahesh Bashyal and Shea Teems Weed control is vital for profitable citrus production since weeds compete for nutrients and water, can harbor diseases and pests, and get in the way of equipment and workers. Without proper management, weeds lead to reduced crop yield and economic losses. Chemical weed control using herbicides is the most common …
Post-Hurricane Weed Management
By Ramdas Kanissery Hurricanes and the associated flooding will impact weed management in the affected season and the following years. Weeds should be effectively managed after these severe weather events as weeds may take advantage of the reduced competitiveness of recovering trees. INTENSIFY SCOUTINGA critical step in weed management after hurricanes is to scout groves and note the emergence of …
Changing Psyllids to Make Them Incapable of Spreading HLB
By Kirsten S. Pelz-Stelinski and Lukasz L. Stelinski Managing Asian citrus psyllids (ACP) remains a consideration for growers because psyllids transmit the citrus greening disease pathogen, Candidatus Liberibacter asiaticus (CLas), to newly planted trees. There are several tools that can reduce psyllid populations or mitigate the symptoms of HLB and improve the health of infected trees. However, additional methods that …
Fungi Controlling Whiteflies in North Florida
Entomopathogenic fungi have recently been seen attacking citrus whitefly and cloudywinged whitefly nymphs in North Florida citrus groves. Muhammad Shahid, Mujahid Hussain and Danielle Sprague, all with the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), wrote about the “friendly” fungi in the October UF/IFAS Cold Hardy Citrus Connection newsletter. Shahid is a horticulturalist and Hussain is a …
Evolution of Sting Nematode Integrated Pest Management
By Homan Regmi, Larry Duncan and Johan Desaeger Two field trials were initiated in a Polk County, Florida, commercial grove of 15-month-old Valencia on Kuharske trees in 2019 to measure the effectiveness of integrated pest management (IPM) tactics for managing sting nematodes (Belonolaimus longicaudatus). Six chemical nematicides, many newly released, were compared in one trial. In the second, perennial peanut …
Extension Agents Assess Hurricane Damage
“Hurricane Ian has devastated much of Florida’s citrus industry,” said Michael Rogers, director of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center. “The harsh reality is that the 2022–2023 season will be one of the most challenging that any of us has faced.” Several UF/IFAS Extension agents made early assessments of the …
Grower Says Fruit Drop Worsening Each Day Since Ian
A week before Hurricane Ian tore across Florida, Glenn Beck of Beck Bros. Citrus reported that there were hopeful signs for the coming season. Fruit in his better-looking groves were in the size range that tends to hold on trees until harvest. Beck, and his brother Mark, own and manage citrus groves across the state. He says each day since …
Alico: Fruit Drop Significant; Most Trees Intact
Alico, Inc. reported on Sept. 30 that initial observations following Hurricane Ian indicate there was significant drop of fruit in its groves. However, most trees remain intact. The magnitude of the fruit drop will be formally calculated by the company’s staff and insurance companies in coming weeks. Alico has 48,900 acres of citrus groves in Charlotte, Collier, DeSoto, Hardee, Hendry, …
CRAFT Adds Assistant Program Manager
The Citrus Research and Field Trial (CRAFT) Foundation recently hired Tina Buice as assistant program manager. The Highlands County resident had previously worked for nearly two decades at the Florida Department of Agriculture and Consumer Services Division of Plant Industry (FDACS DPI). She was most recently an environmental specialist in the FDACS DPI Avon Park office. Through her work with …
CRAFT Cycle 4 Coming Soon
The application window for Cycle 4 of the Citrus Research and Field Trial (CRAFT) program is expected to open in early October and remain open for a period of 60 days. Projects approved for year four of the CRAFT program in Florida will have a planting deadline of June 2024. CRAFT is working to finalize a presentation of factors of …
Controlling Diplodia SER on Grapefruit
Studies that show some potential for control of Diplodia stem-end rot (SER) on fresh grapefruit were discussed at the recent Citrus Packinghouse Day. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researcher Mark Ritenour made the presentation. Ritenour works as a professor of postharvest physiology and management at the Indian River Research and Education Center in Fort Pierce. …
Varroa Mite Management Guide to Protect Honey Bee Health
By Sabrina Halvorson The Honey Bee Health Coalition unveiled the 8th edition of the Tools for Varroa Management Guide. The guide provides information on the latest tools and options for beekeepers and others in the United States and Canada to keep bees healthy and manage varroa mites, which spread disease within and among honey bee colonies. An expert team of beekeepers, …
How to Get Certified for Paraquat Dichloride Use
By Ajia Paolillo and Lourdes Pérez Cordero If you use herbicides containing paraquat dichloride in your citrus groves, it is important that you are aware of the use certification requirements for this product. In 2016, certification and training for the use of this pesticide were put into place in accordance with the Environmental Protection Agency’s (EPA) risk mitigation requirements. Any …
California CRaFT Project Targets Psyllids
All commercial citrus producers in California are invited to apply for participation in the Citrus Research Board’s (CRB) California-focused Citrus Research and Field Trials (CA-CRaFT) project. The overarching goal of CA-CRaFT is to demonstrate the effects of additional mitigations on Asian citrus psyllid control within commercial citrus groves across the various citrus-growing regions in California. The project is supported by …
Fruit Fly Actions in California and Texas
Federal and state officials in July established an Oriental fruit fly (OFF) quarantine in California and removed two Mexican fruit fly (Mexfly) quarantine areas in Texas. The U.S. Department of Agriculture’s Animal and Plant Health Inspection Service (APHIS) took the actions along with the California Department of Food and Agriculture (CDFA) and the Texas Department of Agriculture (TDA), respectively. CALIFORNIA …
A Two-Pronged Approach to Suppress Psyllids
By Bryony C. Bonning and Lukasz L. Stelinski Asian citrus psyllids (ACP) transfer the pathogen that causes citrus greening from plant to plant as they feed. After confirmation of citrus greening in Florida in 2005, growers intensified their use of insecticides against ACP to try to stop disease spread. However, this method alone has yielded variable success and increased costs. …
European Mandarin Production to Drop
European Union (EU) mandarin production in 2021–22 is forecast at 3.16 million metric tons (MMT), a 2.3% decrease from the previous year, the U.S. Department of Agriculture’s Foreign Agricultural Service (FAS) recently reported. Spain will be the largest EU producer of mandarins in 2021–22 at 2.1 MMT, down from 2.3 MMT the prior year. Italy’s expected mandarin production of 832,300 …
Update to Hurricane Forecast Issued
On Aug. 4, Colorado State University (CSU) decreased its hurricane forecast for Atlantic seasonal activity and landfall strike probability for 2022. But citrus growers and other agriculturists shouldn’t relax their guard because the CSU Department of Atmospheric Science continues to call for an above-average Atlantic hurricane season. NEW PROJECTIONSCSU now forecasts the Atlantic will have 18 named storms in 2022, …





























