By Tacy Callies Before they were married, Nate and Anna Jameson vowed they would one day farm for themselves. They met while attending the University of Florida. Nate graduated with a Bachelor of Science in ag operations management, while Anna earned her degree in animal science. After graduation, Anna worked for Lykes Meat Group and Nate for Ben Hill Griffin …
Transgenic Efforts Against HLB
Matthew Mattia recently provided an overview of work at the U.S. Department of Agriculture Agricultural Research Service (USDA ARS) transgenic test site in Fort Pierce. Transgenic refers to an organism that contains genetic material into which DNA from an unrelated organism has been artificially introduced. Scientists at the Picos Farm screen transgenics for suppression of citrus Candidatus Liberibacter asiaticus (CLas), …
Prevent and Recover From Hurricane Damage
By Christopher Vincent, Tripti Vashisth and Gillian Zeng Michalczyk Hurricane Ian harmed citrus trees in much of Florida, especially in areas where sweet oranges are grown. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers are tracking the health of trees in groves around the state as they struggle to recover. Fall applications of gibberellic acid before the storm …
Reasons for Less Argentine Lemon Production
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 …
USDA Funds Three Georgia Citrus Projects
The U.S. Department of Agriculture Agricultural Marketing Service (USDA AMS) funded three citrus projects in Georgia for fiscal year 2023. SATSUMA EDUCATIONThe Georgia Department of Agriculture (GDA) received $103,225 for a satsuma education project. GDA will partner with local farmers and produce distributors to increase the availability of Georgia-grown satsuma mandarins in retail locations. The project will work closely with …
What To Do When Groves Flood
By Mongi Zekri During heavy rains in the summer, excess water must be removed from the root zone. Flooding injury can be expected if the root zone is saturated for three days or more during extended summer rains at relatively high soil temperatures (86 to 95 degrees). Flooding during the cooler December–March period can be tolerated for several weeks at …
Global Mandarin Production Declining
Global production of tangerines/mandarins for 2022–23 is estimated by the U.S. Department of Agriculture Foreign Agricultural Service (USDA FAS) to be 36.9 million metric tons (MMT), down 900,000 metric tons (MT) from the prior year. China production, which accounts for almost 72% of global tangerine/mandarin production, is estimated to be down 2% to 26.5 MMT due to lower yields. European …
The Status of Citrus Canker in Georgia
Citrus canker was found for the first time in Georgia this past season. Unfortunately, it may be here to stay. Jonathan Oliver, University of Georgia (UGA) assistant professor and small fruits pathologist, talked about the disease during a citrus meeting in Valdosta, Georgia, on Aug. 9. He emphasized that Georgia producers may have to learn to live with the disease …
Doubling Down on CRISPR Research
By Michael E. Rogers We have all been waiting (and waiting some more) for new varieties to be developed that are resistant to HLB. Ten years ago, researchers thought they were really close to having new HLB-resistant varieties developed using gene-editing CRISPR technology. But as science goes, the story was much more complicated than first believed. A single edit to …
Update on Citrus Greening in Georgia Groves
Citrus greening disease is no longer just a problem in residential trees in Georgia. For the first time last year, citrus greening, also known as huanglongbing or HLB, was observed in commercial plantings in Pierce, Wayne and Grady counties, says Jonathan Oliver, University of Georgia (UGA) assistant professor and small fruits pathologist. Oliver discussed the disease during a citrus meeting …
The Benefits of Growing Citrus on UV-Metalized Reflective Mulch
By Jawwad Qureshi, Lauren Diepenbrock and Davie Kadyampakeni Protecting citrus trees from the Asian citrus psyllid (ACP) is critical to reducing the spread and severity of huanglongbing (HLB) or citrus greening disease. ACP, the vector of the pathogen responsible for causing HLB in citrus, needs young shoots to develop and reproduce. The frequent availability of viable shoots in young trees …
Stelinski Elected Entomological Society Fellow
Lukasz Stelinski, a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) entomology professor, has been elected a fellow of the Entomological Society of America (ESA) for 2023. He is one of six recognized for outstanding contributions to entomology via research, teaching, Extension, administration, military service or public engagement and science policy. Stelinski works at the UF/IFAS Citrus Research …
South Africa Mandarin Production to Grow
Tangerine/mandarin production in South Africa is forecast by the U.S. Department of Agriculture Foreign Agricultural Service (USDA FAS) to grow by 6% in 2022–23 to 680,000 metric tons (MT). There is a growing trend to establish new orchards under netting, which has improved water efficiency, yields and the overall quality of mandarins in South Africa. INCREASED PLANTINGSThe South African tangerine/mandarin …
Return-on-Investment Potential of CUPS
By Ariel Singerman and Arnold W. Schumann To exclude the Asian citrus psyllid (ACP, Diaphorina citri) vector of huanglongbing (HLB) and thereby produce disease-free healthy fruit, fresh citrus can be grown under protective screen structures. The expected economic benefit from adopting citrus under protective screen (CUPS) and excluding the ACP is increased yield and quality of fruit, which in turn, are …
Citrus Production Guide Available at Expo
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 …
Biologically-Based Management of Citrus Pests
By Jawwad Qureshi Management of the Asian citrus psyllid (ACP, Figure 1) is critical because it is responsible for spreading huanglongbing (HLB) disease. Although HLB is established in Florida, it continues to spread through ACP feeding in already infected trees and by infecting newly planted young trees. Some ACP control occurs naturally in the environment by beneficial organisms such as …
UF/IFAS Educational Programs at Expo
University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) citrus researchers and Extension staff will provide multiple educational programs at the Citrus & Specialty Crop Expo Aug. 16–17. The event will be held at a new location this year — the Florida State Fairgrounds in Tampa. Attendance is free to growers, but registration is required. UF faculty and staff …
Fruit Quality Evaluations for Georgia Citrus Varieties
Characteristics of 30 varieties and 45 variety/rootstock combinations were reported in Evaluating Fruit Quality of Citrus Varieties in Georgia, 2021-22. Jacob Price, county Extension coordinator for Lowndes County and Extension citrus specialist with University of Georgia (UGA) Extension, authored the report. Price noted that most groves in Georgia were planted after 2014. Initially, satsuma mandarins (Citrus unshiu) on trifoliate rootstocks …
South Africa Lemon/Lime Production to Shrink
Fresh lemon/lime production in South Africa is forecast to shrink by 13% to 653,000 metric tons (MT) in 2022–23, the U.S. Department of Agriculture Foreign Agricultural Service (USDA FAS) reported recently. In the prior season, the country produced a record 748,000 MT. The yield reduction this year is due to hailstorm damage in the Eastern Cape in November 2022. PLANTINGS …
Accelerating Citrus Breeding Efforts
By John M. Chater Professors Jude Grosser and Fred Gmitter have been breeding improved citrus varieties at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center (CREC) for decades. Over time, they have released several of their advanced selections. Many of these selections are sweet oranges. There is a subset of these creations …