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A newly published study suggests that the use of individual protective covers (IPCs) followed by monthly applications of homobrassinolide (HBr) after IPCs are removed is beneficial. The two-step approach can help young mandarin trees stay healthier longer and produce more fruit in Florida’s HLB-endemic environment. The study, “Combining Individual Protective Covers and Homobrassinolide Treatment Prolongs Tree Health and Increases Fruit …
By Flavia Tabay Zambon and Paulo Eduardo Branco Paiva Florida’s citrus industry has faced severe decline due to huanglongbing (HLB, also known as citrus greening). Production has dropped 92% since the 2003–04 season, according to the U.S. Department of Agriculture Economic Research Service. Growers have relied on cultural practices, tolerant varieties and antimicrobial treatments, especially oxytetracycline (OTC), which has recently …
Mary Sutton, assistant professor and citrus Extension specialist at the University of Georgia, provided an update on the status of the state’s citrus crop and discussed a fertilizer trial her laboratory is conducting. FRUIT DROP AND FRUIT SIZE Sutton reported that June drop is wrapping up for much citrus. “We should see less fruit drop as we move into the …
The Citrus Industry section of the July 2026 issue of Specialty Crop Grower magazine provides conference coverage, new research on a biofertilizer, details on citrus under protective screen (CUPS) expansion and more. The section opens with coverage of the Florida Citrus Industry Annual Conference. Optimism ran high following a $196 million budget allocation for the citrus industry from the Florida …
The June All In For Citrus podcast features Tripti Vashisth, associate center director and professor of horticultural sciences at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center. She discusses the benefits of combining plant growth regulators (PGRs) with trunk injection of oxytetracycline (OTC). For most Florida citrus growers, application of OTC has …
Compost-amended plots (left) had more weeds than those with no compost. A new study published in Scientific Reports examines whether repeated compost applications could improve the health and productivity of young citrus trees growing under endemic huanglongbing (HLB) conditions in Florida. Gabriel Pugina, Caroline Tardivo, Brittney Monus, Emma Dawson, Sarah Strauss and Ute Albrecht of the University of Florida Institute …
University of California Riverside Extension subtropical horticulturist Mary Lu Arpaia recently discussed the uses of the plant growth regulators 2,4-D, NAA and ethylene in California citrus. Her June 9 presentation was part of the Citrus Research Board Webinar Series. 2,4-D One use of 2,4-D in California is to increase fruit size of navel oranges, grapefruit, mandarins and mandarin hybrids. For …
There are numerous preharvest and postharvest uses of gibberellic acid (GA) in California citrus, a University of California Riverside Extension subtropical horticulturist reported during a June 9 webinar. Mary Lu Arpaia’s GA discussion was a major portion of her broader topic of plant growth regulators in California citrus. Her presentation was part of the Citrus Research Board Webinar Series. WHAT …
Rabobank recently forecast a challenging 2026–27 harvest year for the global orange juice (OJ) industry. It reported that while global supply is forecast to contract, the ongoing decline in OJ demand is likely to continue. As a result, global frozen concentrated orange juice (FCOJ) prices are expected to struggle to recover sustainably. This article, focusing on OJ supply, consists of …
By Lauren Fessler Mathews, Ana Redondo and Ozgur Batuman Citrus canker continues to impact Florida citrus, increasing premature fruit drop and decreasing yield and fruit quality. While copper sprays have long been relied upon to control this disease, concerns about environmental impact and possible resistance development have led to efforts to find sustainable alternatives. Previous studies have shown that plant …
Brazil’s Fundecitrus on May 8 forecast 2026–27 orange crop production for the Citrus Belt of São Paulo and the Triângulo/Southwest Minas Gerais region at 255.2 million 40.8-kilogram boxes. That’s a 12.9% reduction from the previous crop of 292.94 million boxes and a 14.7% decline relative to the average of the last decade. REASONS FOR LESS ORANGES The projection for lower …
April and May are typically the driest months in Florida. But South Florida crop consultant Gene McAvoy said conditions are dire even for this time of the year. “We haven’t had a drought like this in 20 years, at least,” McAvoy said. “We didn’t have much of a rainy season. It’s really impacting citrus. You do irrigate trees, but you’re …
The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) recently provided additional information about the UF-1424 mandarin variety previously known as Greenie. “UF Citrus Selection 1424: A Promising Early-Season Mandarin for Cold-Hardy Regions,” an article by Alaiha Asif, Muhammad Shahid, John Chater and Fred Gmitter, appeared in the April Cold Hardy Citrus Connection. FRESH MARKET SUITABILITY UF-1424 is …
The U.S. Department of Agriculture (USDA) Animal and Plant Health Inspection Service (APHIS) in cooperation with the California Department of Food and Agriculture (CDFA) have expanded the area quarantined for citrus greening in California. APHIS established a new quarantined area in the Ramona area of San Diego County of 93 square miles. The agency also expanded the quarantined area in …
Fundecitrus on April 10 reported the final forecast for the 2025–26 orange crop for Brazil’s São Paulo and West-Southwest Minas Gerais Citrus Belt. The forecast is for 292.94 million 90-pound boxes. Of the total, about 25.69 million boxes were produced in the Triângulo Mineiro region. Production this season was 26.9% higher than the previous crop, which reached 230.87 million boxes. …
University of Georgia (UGA) Assistant Professor and Citrus Extension Specialist Mary Sutton reported on the impact of this winter’s freeze on fruit quality and trees in Georgia: FRUIT QUALITY A Tango trial was harvested at the end of January as a winter storm was hitting. A subsample was taken prior to that on Jan. 15 and sampled again after the …
Florida citrus producers have long used copper as a way to protect against citrus canker. However, it’s time for growers to have other options. That’s a message shared by Ozgur Batuman, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) associate professor and citrus pathologist at the Southwest Florida Research and Education Center in Immokalee. He spoke on this …
Agriculture officials have expanded the areas quarantined for sweet orange scab (SOS) in the Los Angeles and Villa Park areas of Los Angeles and Orange counties in California. The U.S. Department of Agriculture Animal and Plant Health Inspection Service (APHIS) in cooperation with the California Department of Food and Agriculture (CDFA) expanded the quarantine. SOS is a disease caused by …
By Tripti Vashisth and Prudhvi Vulchi Plant growth regulators (PGRs) have become an important management tool for Florida citrus growers facing the challenges of huanglongbing (HLB). HLB disrupts the tree’s hormonal balance by reducing growth-promoting hormones like cytokinin and gibberellins and increasing stress-related hormones. This imbalance weakens carbohydrate transport, reduces sink strength and accelerates canopy decline. PGRs can help restore …
The Feb. 10 forecast for Brazil’s São Paulo and Triângulo/Sudoeste Mineiro region is 292.6 million boxes of oranges. That’s a 0.7% reduction from the Dec. 10 forecast of 294.81 million boxes, and a 7% reduction from the initial forecast of the season on May 9 of 314.6 million boxes. The reduction is due to a decrease in the average size …
