Postbloom fruit drop (PFD), along with the use of bactericides to control HLB, were the big issues for more than 40 participants in a grower roundtable Wednesday in Wauchula. LeAnna Himrod, one of the roundtable hosts, summarizes the issues addressed. Regarding bactericides, she reports: “There were a lot of questions about the bactericides regarding timing: What’s the best time of …
How to Achieve Accurate Herbicide Application
By Ramdas Kanissery As the summer season of weed control kicks off in citrus groves, now is the perfect time to make sure your spray rigs are set up for success. Effective weed control depends on: In many cases, poor herbicide performance is caused by two main issues: spraying at the wrong time and using incorrect application techniques. We’ve already …
Management Methods for Alternate Bearing
Practices that might help with alternate bearing were recently addressed in a report by Mary Sutton, University of Georgia (UGA) assistant professor and citrus Extension specialist. Alternate bearing, a common problem in many mandarin varieties, is the tendency of a tree to produce a heavy crop one year followed by a light crop the subsequent year. A slightly edited version …
Dealing With Disease: Canker, Black Spot and More
As the rainy season in Florida is set to begin, we caught up with Megan Dewdney to discuss citrus canker and other disease issues. Dewdney is a plant pathologist with the University of Florida Institute of Food and Agricultural Sciences. Q: How has the prevalence of citrus canker been in Florida in the past year or so? A: Dewdney: Citrus …
Millennium Block Research Update
Flavia Zambon, assistant professor with the University of Florida Institute of Food and Agricultural Sciences, recently provided an update about Millennium Block research at the Indian River Research and Education Center. The block, established in 2019–20, is a large-scale, 5,500-tree trial seeking HLB-tolerant citrus varieties. Zambon says some varieties in the trial are showing strong fruit attributes without the need …
The Causes of Alternate Bearing
Mary Sutton, University of Georgia (UGA) assistant professor and citrus Extension specialist, recently wrote about the causes of alternate bearing in Georgia groves. Alternate bearing is a common problem in many mandarin varieties. A slightly edited version of Sutton’s report follows. CARBOHYDRATES During photosynthesis, leaves produce sugars that are either exported and utilized for growth or stored as starch in …
Pest Scarring Damage Can Differ by Citrus Variety
A new pictorial guide can help California growers differentiate between the damages caused by the same pest on different citrus varieties. Comparing the Fruit Rind Scarring That Three Early-Season Pests Cause in Mandarin Species and Sweet Orange was published by University of California Agriculture and Natural Resources. Early-season insect pests — such as katydids, earwigs and citrus thrips — feeding …
Biosolids: The Scoop on Processed Poop
By William Mitchell, Taylor O’Bannon and Michelle Danyluk Biosolids, sometimes referred to as sewage sludge, are a primarily organic solid product produced by wastewater treatment processes. These organic solids are often used as an inexpensive soil amendment to enhance soil quality. KNOW THE RULES AND RISKS The Food Safety Modernization Act (FSMA) Produce Safety Rule (PSR) prohibits the use of …
Citrus Crop Forecast Shows Changes in All States
The April 10 citrus crop forecast from the U.S. Department of Agriculture National Agricultural Statistics Service (USDA/NASS) showed increases for most citrus-producing states. FLORIDA In Florida, grapefruit and tangerine/mandarin crops climbed 8% and 14%, respectively. The Florida grapefruit crop increased by 100,000 boxes, to 1.3 million boxes. The tangerine/mandarin crop rose by 50,000 boxes, to 400,000 boxes. Florida’s orange crop …
Citrus Forecast Has Slight Changes
The March citrus forecast from the U.S. Department of Agriculture National Agricultural Statistics Service (USDA/NASS) calls for slight increases in Florida’s orange and grapefruit crops compared to the prior season. Florida’s lemon and tangerine/mandarin forecasts were unchanged from February’s forecast. FLORIDA ORANGES The Florida all-orange forecast rose 1%, or 100,000 boxes, from the February forecast to 11.6 million boxes. The …
Cold-Hardy Citrus Crop Outlook for 2025
Growers in the cold-hardy citrus region enjoyed a bountiful crop in 2024. Unfortunately, that is not expected to be the case in 2025. Lindy Savelle, executive director of the Georgia Citrus Association, said the expected drop in volume is due to multiple factors, including the winter storm last month that brought historic snowfall and sub-freezing temperatures over multiple days. But …
Global Lemon/Lime Production to Decline
Global production of lemons and limes in 2024–25 is forecast to be down 651,000 tons, to 10.2 million tons, by the U.S. Department of Agriculture Foreign Agricultural Service (USDA/FAS). The decline is due to a drop in production in the European Union (EU) and Türkiye as a result of unfavorable weather and yields. Exports are forecast to rise with high …
Florida Crop Forecast Has Changes
The Feb. 11 citrus crop forecast, as reported by the U.S. Department of Agriculture National Agricultural Statistics Service (USDA NASS), shows both decreases and an increase for Florida when compared to the January forecast. LESS ORANGESThe 2024–25 Florida orange forecast is 11.5 million boxes, down 500,000 boxes, or 4%, from the January forecast. If realized, this will be 36% less …
Positive Gains for Mexican Orange and OJ Production
The U.S. Department of Agriculture Foreign Agricultural Service (USDA/FAS) recently forecast that Mexican orange and orange juice (OJ) production will both increase slightly in 2024–25. ORANGES Orange production is forecast at 5.05 million metric tons (MMT), 2% more than the previous season. Mexico ranks fourth worldwide in the production of oranges with 10% of total production. It trails only Brazil, …
Tango Rootstock Trial Update
Members of the University of Georgia (UGA) Extension team recently wrote an update on a Tango rootstock trial in the Cold Hardy Citrus Connection. The authors were Jake Price, Mary Sutton, Doug Collins, Jacob Kalina, Josh Dawson, Holly Anderson, Michasia Dowdy, Sara Curry, Ben Reeves, Tucker Price and Justin Shealey. Edited excerpts follow: The Tango rootstock trial has been through …
Texas Citrus Industry Assessing Freeze Damage
By Maegan Beatty Across the United States, farmers have faced freezing temperatures, snowstorms and unpredictable conditions this winter. Texas citrus growers are among those evaluating the effects of the most recent temperature drop. “In regard to growers experiencing damage, we are still assessing,” said Dale Murden, president of Texas Citrus Mutual. “It’s too early to tell overall, but we will …
Temperature Inversion: Not a Friend of Pesticide Applicators
By Wael Elwakil Editor’s note: This article grants one continuing education unit (CEU) in the Core category toward the renewal of a Florida Department of Agriculture and Consumer Services restricted-use pesticide license when the accompanying test is submitted and approved. Temperature inversion is a weather phenomenon that alters the natural air movement in the lower layer of the atmosphere (troposphere). …
Brazilian Orange Juice and Trade
Orange juice processing and trade are among topics addressed in a recent U.S. Department of Agriculture (USDA FAS) report on Brazilian citrus. Approximately 80% of Brazilian orange production is used for juice processing, and 20% goes to the market as fresh fruit, USDA FAS reported. Orange juice production is concentrated in the state of São Paulo, followed by Minas Gerais. …
Sweet Orange Scab Quarantined Area Expanded
Effective immediately, the U.S. Department of Agriculture Animal and Plant Health Inspection Service (APHIS), in cooperation with the California Department of Food and Agriculture (CDFA), is expanding the sweet orange scab quarantine in the Santa Ana area of Orange County in California. APHIS is expanding this quarantined area by 32 square miles because of a sweet orange scab detection in …
Snow and Sub-Freezing Temperatures Hit Cold-Hardy Citrus
Citrus in the cold-hardy region of South Georgia, South Alabama and North Florida encountered below-freezing temperatures and historic snowfall all week. Growers are now taking stock of their groves, surveying damage and preparing for what to do next, which includes managing phytophthora. “Most all of the crop was in, so there was very little exposure there. There’s a little bit …