review

New Review Details Plant Growth Regulator Research

Daniel CooperPGRs, Research

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 …

Kaolin

How To Keep Kaolin on Your Trees Through the Rain

Daniel CooperHLB Management, Research, Tip of the Week

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 …

Rabobank

Brazilian OJ Industry ‘Challenging,’ Rabobank Reports

Daniel CooperBrazil, Orange Juice

According to a September 2026 Rabobank report, the current environment for Brazilian orange juice (OJ) remains challenging for both farmers and the industry, with prices still low but starting to show some slightly positive signs. It reported that spot orange prices for the industry increased from BRL 25/box (approximately $4.30/box in U.S. dollars) in May to BRL 31/box (approximately $6.03/box …

rate

Brazilian Psyllid Rate Increases 372%

Daniel CooperBrazil, Psyllids

Psyllid capture rates in São Paulo and the Triângulo/Southwest Minas Gerais region of Brazil rose sharply during the second half of August. The average jumped from 1.3 psyllids per trap in the previous two-week period to 6.13 psyllids per trap — a 372% increase. This spike serves as a warning regarding management of the greening-spreading psyllid, particularly during a time …

chilli thrips

Weed Management Key To Reducing Chilli Thrips in CUPS

Daniel CooperCUPS, Pests, weeds

Chilli thrips’ damage in Florida citrus under protective screen (CUPS) should motivate growers to manage weeds more effectively. Lauren Diepenbrock, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) associate professor and entomologist, shared that advice during this year’s Citrus & Specialty Crop Expo in Fort Myers, Florida. Diepenbrock said chilli thrips feed on citrus trees but they also …

royalty reimbursement

CRAFT Announces Royalty Reimbursement

Daniel CooperCRAFT

The Citrus Research and Field Trial (CRAFT) Foundation recently announced the addition of a royalty reimbursement component to Cycle Eight, along with other updates. GROWER ASSISTANCE The royalty reimbursement provides growers with additional assistance to help offset the cost of planting eligible citrus trees and utilizing eligible biological delivery technologies that require a royalty payment. This new opportunity expands on …

Mexfly

Mexfly Quarantine Removed in Hidalgo County, Texas 

Daniel CooperPests, Regulation, Texas

The U.S. Department of Agriculture Animal and Plant Health Inspection Service (APHIS) has removed the Mexican fruit fly (Mexfly) quarantine in Hildalgo County, Texas, designated the Peñitas-Granjeno quarantine. The action was taken in cooperation with the Texas Department of Agriculture (TDA). It releases 58.66 square miles from quarantine, including 45.03 acres of commercial citrus. APHIS originally established the quarantine, restricting …

mandarins

USDA To Buy Fresh Mandarins

Daniel CooperMandarins, USDA

The U.S. Department of Agriculture (USDA) recently announced its intent to purchase $25 million in fresh mandarins from American farmers to distribute to schools and food banks across the country. The mandarin purchase was part of a planned purchase of $156 million in multiple agricultural commodities, including canned peaches, concord grape juice, pork products, prunes, raisins, walnuts and wild-caught shrimp.  …

application

Fall Fertilizer Application in Florida

Daniel CooperNutrition, Tip of the Week

By Noor Ul Basar, Davie Kadyampakeni and Muhammad Adnan Shahid As citrus trees transition into the fall season, the nutrient demand of the trees will change. Therefore, nutrient application should be adjusted accordingly. NITROGEN Applying nitrogen (N) beyond October through December encourages tree canopy development at the expense of fruit yield and should be avoided. Excessive application of N in …

severity

Greening Severity Increasing in Brazil

Daniel CooperBrazil, Citrus Greening

Despite a slowdown in Brazil’s citrus greening incidence growth rate in 2026, the severity of the disease continues to climb in trees remaining in the field, according to Fundecitrus’ annual citrus disease survey. Average severity rose from 22.7% to 27% across orchards of all ages, and from 25.9% to 31% when considering only orchards currently in production. The survey also …

trunk injection

HLB Research Looks to Automate Trunk Injection

Daniel CooperHLB Management, Technology

As oxytetracycline (OTC) trunk injection becomes an important tool for managing HLB, researchers are looking for ways to make the labor-intensive treatment faster, more efficient and less expensive. Part of a research paper published in Tropical Plant Pathology discusses an automated trunk-injection system being developed for HLB-affected citrus. The authors of the paper, titled “Integrated pest management strategies to address …

orange crop

Brazilian Orange Crop Forecast Increased

Daniel CooperBrazil, Crop Forecast

Fundecitrus’ first re-estimate of the 2026–27 orange crop for Brazil’s São Paulo and Triângulo/Southwest Minas Gerais regions, released Sept. 10, indicates production of 263.15 million 40.8-kilogram boxes. That’s an increase of 7.95 million boxes, or 3.1%, from the initial estimate released in May. The revision stems from an upward adjustment in projected fruit weight for early- and mid-season varieties, which …

solutions

Ag Tech Solutions Sought for California Crops

Daniel CooperCalifornia Corner, Technology

Applications are open through Sept. 18 for University of California Agriculture and Natural Resources Connect (UC ANR Connect), a grower-informed commercialization program for agriculture technology. Selected companies in the program receive commercialization support, direct feedback from California growers and agricultural professionals, industry connections and the opportunity to demonstrate technology live at a field day. UC ANR Connect is operated by …

Egypt

Egypt Registers New Lemon Variety

Daniel Cooperlemons, Varieties

The Egyptian Ministry of Agriculture and Land Reclamation has officially registered a new seedless and thornless lemon variety named Egypt 25 (Citrus aurantium). According to state-level administrative reports published by Egypt Today, the proprietary cultivar was engineered and certified by the Horticulture Research Institute, which operates directly under Egypt’s Agricultural Research Center. This official registration marks a strategic push by …

selections

Fresh Market Selections for CUPS

Daniel CooperCUPS, Fresh

By John M. Chater Arnold Schumann, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) professor at the Citrus Research and Education Center (CREC), pioneered the citrus under protective screen (CUPS) production method in Florida. He started his CUPS work over 12 years ago to help provide horticultural tools to growers to continue producing high-quality fruit by means of …

resistant trees

Considerations When HLB-Resistant Trees Arrive

Daniel CooperHLB Management, Research

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 …

rate

Greening Growth Rate in Brazil Slows to Nine-Year Low

Daniel CooperBrazil, Citrus Greening

The 2026 citrus disease incidence survey conducted by Fundecitrus shows that greening affected 48.08% of orange trees in Brazil’s Citrus Belt spanning São Paulo and the Triângulo/Southwest Minas Gerais regions. This is a 0.9% increase compared to 2025, when the incidence rate was 47.63%. The rise was just 0.45% — significantly lower than the 3.28% increase recorded in 2025. This …

fruit split

Fruit Split Showing in Georgia; Color Break Likely Soon

Daniel CooperGeorgia, Production

Fruit split issues are starting to show up in some Georgia citrus groves, University of Georgia Assistant Professor and Citrus Extension Specialist Mary Sutton reported recently. She also noted that color break is likely to begin soon in Georgia citrus fruit. According to Sutton, fruit splits typically start at the stylar end (bottom end) of the fruit and spread vertically …

renewable energy

Guidance on Renewable Energy Leases

Daniel CooperAgriculture

Farmers and landowners are increasingly being approached about leasing land for solar, wind and battery storage projects. According to the Center for Rural Affairs (CFRA), these agreements can create opportunities to generate long-term, stable income from property as renewable energy development grows. A new fact sheet from the CFRA aims to help landowners better understand the leasing process. “Renewable energy …

South Africa

South Africa Export Forecast and Concerns

Daniel CooperExport, International

The Citrus Growers’ Association (CGA) of Southern Africa has lowered its South African citrus export forecast for the 2026 season. The association now estimates export volume of 205.3 million 15-kilogram cartons, down from the 209.4 million cartons projected before the season began. The adjustment is primarily due to lower export outlooks for mandarins, navel oranges and grapefruit. On the other …