Below you'll find a list of all posts that have been categorized as “Research”
An artificial intelligence (AI) model developed by researchers in China has shown promise for detecting HLB in leaves before visible symptoms appear. The technology could eventually give citrus growers another tool for earlier disease detection and more targeted grove monitoring. The study combined three types of information: standard color photographs, hyperspectral imaging and measurements of leaf chlorophyll content. The researchers …
Even with AI-enabled and autonomous machines, orchard work still requires human knowledge, researchers at the University of California, Davis (UC Davis) determined. Their conclusion was based on a study of 16 fruit tree operations in California and Washington over three years. What changes is how the work gets done. The study, drawing on 165 in-depth interviews with workers and growers, …
Combining organic materials with conventional fertilizers may help citrus growers improve yields, fruit quality and soil health, according to a study published recently in Scientia Horticulturae. The study evaluated three citrus cultivars — Ehime, Haruka and Orah — in orchards in Chongqing, China, from 2022 to 2024. Researchers compared conventional inorganic fertilizer with fertilizers combining inorganic nutrients and organic materials …
Researchers have identified a naturally occurring citrus root bacterium that produces a compound capable of suppressing the bacterium associated with huanglongbing (HLB) disease. This offers a potential new avenue for disease management. A research study examined whether bacteria living naturally on and within citrus plants could help fight Candidatus Liberibacter asiaticus (CLas), the bacterium associated with HLB. Using an automated …
Citrus under protective screen (CUPS) provides citrus growers with a way to overcome the challenges of huanglongbing (HLB) disease. While grapefruit is the predominant variety grown in CUPS, research is underway to expand the varieties grown under screen. That’s one of the remaining CUPS research hurdles for Arnold Schumann, professor of soil fertility and water quality at the University of …
The U.S. Department of Agriculture announced Oct. 13 it is awarding $86.6 million in grant funding to support the specialty crop industry through the Specialty Crop Block Grant Program. The funding includes citrus-specific projects in Arizona, California, Georgia, Louisiana and Texas. ARIZONA University of Arizona Yuma Agricultural Center has funding of $94,506 to deploy two real-time flux tower systems in …
Controlled-release fertilizers (CRFs) may help improve leaf nutrition in citrus trees affected by huanglongbing (HLB), but choosing the right fertilizer program is critical to maintaining yields, according to new research. A University of Florida Institute of Food and Agricultural Sciences study compared two CRF programs with a conventional fertilizer program in mature Valencia sweet orange trees growing in Florida’s sandy …
Researchers have identified two emerging bacterial species on Rangpur limes in Brazil, highlighting the importance of food-safety practices when citrus is grown near livestock or poultry operations. The researchers investigated three bacterial strains recovered during screening of lactic acid bacteria from Rangpur limes. One strain was identified as Escherichia albertii and two as Kosakonia cowanii. The researchers used biochemical testing, …
A new study suggests that tackling both the bacterium responsible for huanglongbing (HLB) and the tree’s own response to infection may offer a better path for managing the disease. A report on the research — “Combating citrus greening disease by simultaneously targeting the pathogen and callose-mediated phloem occlusion” — examines how the disease disrupts the movement of sugars through citrus …
Citrus growers and researchers know that oxytetracycline (OTC) trunk injection can reduce the amount of the bacterium associated with huanglongbing (HLB) disease and improve fruit production and juice quality. However, new research shows the treatment also causes changes in microbial functions around citrus roots. Researchers conducted a field study in a commercial Southwest Florida orchard containing 8-year-old Valencia sweet orange …
Digital technology that creates virtual versions of orchards, trees and fruit shipments could eventually help citrus growers make more informed decisions about production and fruit quality, according to a new review of research. A digital twin combines real-world information, such as weather data, sensor readings and satellite or drone images, with computer models and artificial intelligence. The resulting virtual representation …
Chinese researchers have developed a nanoparticle-based formulation that combines an insecticide and a plant-derived repellent to provide longer-lasting control of HLB-spreading Asian citrus psyllids (ACP). An article about their study, published in Nanomaterials, explores a way to extend pesticide effectiveness while reducing damage to citrus leaves. The article was written by Wenhua Rao, Qianying Li, Kaidi Wang, Chao Shen, Guocheng …
Preharvest silicon (Si) applications, when combined with postharvest salicyclid acid (SA), may increase W. Murcott mandarin fruit size, according to research from Ege University in Türkiye. The study, published in the Ege University Faculty of Agriculture Journal, examined whether the Si and SA applications could help maintain mandarin quality during extended cold storage. The authors are İzzet Atakan Erdallı, Fatih …
Recent Chinese research offers a fresh, strategic blueprint for engineering cold tolerance in citrus. The study reveals that in Citrus ichangensis, a frost-hardy wild citrus relative, the expression of the protective protein CiHSP26.5 is not just turned on or off. Rather, it is fine-tuned over time by two transcription factors, CiERF023 and CiERF041, which serve as its repressor and activator, …
Editing a plant’s genes is only half the battle. Before a new, improved trait can ever reach a farmer’s field, scientists must be able to grow a whole plant from just a few edited cells. That process can be slow, unreliable and, for some plant species, impossible. A new study describes a way to speed up that bottleneck across crops, …
Plant growth regulators (PGRs) could give citrus growers another tool for managing vigorous trees, reducing pruning needs and potentially improving production efficiency, according to a review of decades of citrus research. The review — “Managing Citrus Canopy Growth for Higher Productivity: A Review of Plant Growth Regulator (PGR) Applications” — was published Sept. 8 in Horticulturae. The authors are Kare …
By Christopher Vincent and Rashmi Kumari Florida summers come with intense sunlight, high temperatures and frequent rain. Just as people use sunscreen to protect exposed skin from intense sunlight, plants can benefit from a protective coating on exposed leaf and fruit surfaces. One way to provide this protection is by spraying a kaolin clay particle film on the tree. Although …
A Chinese official’s visit to new citrus facilities in Pakistan showcased citrus research and growing agricultural cooperation between Pakistan and China. Sun Yan, consul general of the People’s Republic of China in Lahore, Pakistan, inaugurated a newly established climate-controlled glasshouse and screen house at the Citrus Research Institute (CRI) in Sargodha. He was briefed on the institute’s research programs, citrus …
The development of citrus varieties that can resist HLB could eventually change how growers manage the disease. However, a recent study suggests the transition may not be as simple as planting resistant trees and stopping control of the Asian citrus psyllid (ACP) that spreads HLB. A paper about the research, published in the April 2026 issue of Agricultural Systems, examines …
Jacob Villagomez, director of governmental affairs for California Citrus Mutual, recently discussed developments that could benefit California citrus growers. Among the topics he addressed in the AgNet News Hour podcast were the U.S. Food and Drug Administration’s (FDA) recent modernization of the federal standard of identity for pasteurized orange juice (OJ) and HLB research in California. STANDARD OF IDENTITY FOR …
