The drop in Brazil’s 2024 citrus harvest is due, among other factors, to the long period of drought observed in the Citrus Belt, according to Fundecitrus. Mitigating problems related to periods of drought is the objective of several studies being conducted by Fundecitrus, Embrapa Cassava and Fruits, Coopercitrus Credicitrus Foundation and the Agronomic Institute (IAC). One of these studies takes …
Clemson to Host Southeast Citrus Expo
With citrus crops gaining popularity in South Carolina, Clemson University announced that the 2024 Southeast Citrus Expo will be held Nov. 22–23 in Charleston. The event will feature drop-in tours, a banquet and a full day of educational sessions. Zack Snipes, horticulture agent with Clemson University Cooperative Extension Service, is the event coordinator. “More and more people are asking for …
Post-Hurricane Disease Concerns
Phytophthora, citrus black spot and HLB are among diseases that could be spread in Florida groves as a direct or indirect result of Hurricane Milton, researcher Megan Dewdney cautioned. Dewdney, a University of Florida Institute of Food and Agricultural Sciences associate professor of plant pathology, offered suggestions for dealing with those diseases during a recent hurricane recovery webinar. PHYTOPHTHORA Phytophthora …
CITRUS NURSERY SOURCE: Tree Propagations Provide Insight on Plantings
By Peter Chaires The summer of 2024 has been one of suspense, hope and anticipation. There is great suspense in learning how many acres will remain in citrus production, be repurposed or worse yet, be developed. There is a great sense of hope that Mother Nature will provide ideal growing conditions for the crop, and natural disaster recovery will not …
What To Do if Brown Rot Surprises You
By Megan Dewdney It is late summer or early fall, and the usual time to consider brown rot treatment options has passed. However, you smell a sharp fermented fruit odor. When you look closer, fruit have the telltale soft brown lesions of brown rot. What options exist to minimize losses now? It is too late for the traditional control options …
Symptoms and Management of Brown Rot and Greasy Spot
University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) presenters on Aug. 30 discussed symptoms and management of the fungal citrus diseases brown rot and greasy spot. Plant pathologist and associate professor Megan Dewdney, the featured speaker, focused on management. Multi-county citrus Extension agent Mongi Zekri, who hosted Dewdney’s talk, described disease symptoms. BROWN ROT Brown rot is usually …
Algal Spot an Increasing Problem in Florida Groves
Algal spot, not frequently seen in Florida citrus groves before 2015, has become more severe in recent years, University of Florida Institute of Food and Agricultural Sciences speakers reported Aug. 30. And the disease is likely to intensify as a problem with average temperatures increasing, said Megan Dewdney, associate professor of plant pathology at the Citrus Research and Education Center …
Getting a Handle on the Giant Swallowtail
By Amir Rezazadeh The giant swallowtail butterfly (Papilio cresphontes) is a beautiful insect, admired for its large wingspan and vibrant yellow and black coloration. However, for citrus growers, this butterfly is often viewed with less enthusiasm. The larvae of the giant swallowtail, commonly referred to as “orange dogs,” can cause significant damage to citrus trees. Understanding the nature of this …
Global Citrus Crops on the Rise
Global production of tangerines/mandarins, grapefruit and lemons/limes is expected to climb in 2023–24, the U.S. Department of Agriculture Foreign Agricultural Service (USDA FAS) reported in its Citrus: World Markets and Trade publication. TANGERINES/MANDARINS Global tangerine/mandarin production for 2023–24 is estimated up 1.2 million tons to 38.2 million tons. Here are expectations for major producing countries: GRAPEFRUIT Global grapefruit production in …
Inclement Weather Cuts South African Orange Export Projections
The Orange Focus Group of the Citrus Growers’ Association of Southern Africa (CGA) on July 23 cut its projections for navel and Valencia orange exports in the 2024 season. NAVELS The projected number of 15-kilogram cartons of navel orange exports is now 21 million. That continues the downward trajectory that was started in May when the season-opening estimate of 25.7 …
Update on Global Orange and OJ Production
Global orange production for 2023–24 is expected to rise slightly while orange juice (OJ) production dips. This forecast is from the U.S. Department of Agriculture Foreign Agricultural Service (USDA FAS) Citrus: World Markets and Trade July report. ORANGES Global orange production for 2023–24 is estimated to rise 1% to 47.4 million tons. Lower production in Brazil and the European Union …
Foliar Feed Your Trees
By Mongi Zekri Foliar fertilizer application is certainly not a new concept to the citrus industry. For over six decades, foliar fertilization has been recommended to correct zinc, manganese, boron, copper and magnesium deficiencies in citrus. It is now common knowledge in agriculture that properly nourished crops may tolerate insect pests and diseases. Traditionally, citrus growers try to achieve optimum …
Slight Changes in European Citrus Production
The U.S. Department of Agriculture Foreign Agricultural Service (USDA FAS) projected a slight decrease in European orange production in 2023–24 and a slight increase in orange juice (OJ) and grapefruit production. ORANGES The USDA FAS semi-annual report projects 2023–24 EU orange production at 5.475 million metric tons (MMT), down from the already short prior-year crop of 5.58 MMT. Orange production …
Irrigation and Fertilization Advice for Georgia Citrus
Jake Price, University of Georgia (UGA) county Extension coordinator, recently wrote the following article about irrigation and fertility for Georgia citrus: I don’t think it has rained since my last blog! Make sure to check your irrigation to make sure it’s working properly. In the research plot, it is very common for the microjets to be stopped up or not spraying properly. …
ACP Management in High-Density Plantings
By Jawwad Qureshi The Asian citrus psyllid (ACP, Figure 1) is the vector of huanglongbing (HLB) disease associated with the phloem-limited bacterium Candidatus Liberibacter asiaticus. Infected trees start to decline and produce poor-quality fruit, which drops prematurely. Consequently, citrus production has decreased dramatically since the advent of HLB in Florida in 2005. There is no cure for the disease yet. …
Worldwide Orange and OJ Production Declining
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 …
Florida Citrus Forecasts Changed
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. …
California Sweet Orange Scab Quarantine Area Expanded
The U.S. Department of Agriculture Animal and Plant Health Inspection Service (USDA/APHIS) is expanding the quarantine area in California for Elsinoë australis, the fungal causal agent of sweet orange scab (SOS). The expansion aligns with the state interior quarantine that the California Department of Agriculture (CDFA) implemented Oct. 1, 2023. SOS infection causes scab pustules that give fruit a corky …
Florida Citrus Crop Reduced
The U.S. Department of Agriculture (USDA) Agricultural Statistics Board released an update to the 2023–24 citrus crop forecast on May 10. FLORIDA ORANGES The Florida orange forecast is lowered 1 million boxes to 17.8 million boxes, representing a 5% decrease from the April forecast. The reduction is in the Valencia crop, which dropped 8% from 12 million boxes to 11 …
Panel Discussions Highlight Florida Citrus Show Seminars
A pair of panel discussions during the citrus seminars at the Florida Citrus Show gave growers the opportunity to engage with experts on top-of-mind topics. BREEDER RECOMMENDATIONS The citrus seminar program started with a discussion among citrus breeders moderated by Flavia Zambon, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) assistant professor at the Indian River Research and …