Citrus canker has been detected in a residential area of Baldwin County, Alabama, which is bordered by Florida and the Gulf of Mexico. Federal and state plant health officials confirmed the identification of the disease from foliage and fruit samples collected by the Alabama Department of Agriculture and Industries’ (ADAI) routine citrus survey. This was the first detection of citrus …
What To Do About Algal Spot
By Megan Dewdney I did not need to visit my field trial to know that algal spot was in bloom on citrus in the last month. I have received many phone calls about it recently as growers notice the bright orange doughnuts on their tree limbs. For those unfamiliar with algal spot, it is a disease that occurs mostly on …
Spot and Stop Worker Heat Stress
By Amir Rezazadeh Heat stress happens when the body is exposed to extreme heat in a hot environment. Heat-related illnesses include heat cramps, heat exhaustion, heat rashes or heat stroke. Other signs of heat stress include sweaty palms, fogged-up safety glasses and dizziness. Those who work outdoors or in hot environments are at risk of heat stress. Workers who are …
Improving Plant Improvement
Many in the Florida citrus industry have long believed that development of trees that are resistant to or tolerant of HLB is the key to coping with the devastating disease. In Florida, most of the work on developing such trees is conducted by researchers at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) and the U.S. Department …
Hesperidin and Good Health Linked
A new systematic review links hesperidin, a flavonoid found in oranges and 100% orange juice (OJ), to health benefits. However, more research is needed to further strengthen results. The Florida Department of Citrus (FDOC)-funded review examined published studies relating to hesperidin in 100% OJ and its impact on several chronic conditions and other measurements. Those measurements included blood levels …
Making Sense of Biologicals: Improve Fruit Size and Quality
Citrus growers need as many tools in their toolbox as possible. With the Florida citrus industry decimated in recent years, mainly due to citrus greening disease, growers are exploring all options to help them succeed. CYAN 365®, a biostimulant from C Green Ag Biotechnology, is one tool that has proven to help enhance the quality and size of citrus crops, …
California Reports Two Citrus Pests
The Citrus Pest & Disease Prevention Program in California recently detected sweet orange scab (SOS) in new areas of the state. Additionally, an unofficial lime swallowtail butterfly (LSB) sample was identified from Los Angeles County, and several LSB sightings have been reported in Los Angeles and San Luis Obispo counties. SWEET ORANGE SCABSOS is a cosmetic fungal disease that impacts …
Mexican Lime Imports Controversial in Australia
Officers from the Federal Department of Agriculture, Water and the Environment in Australia held a meeting in May to discuss an import risk assessment that proposes to allow lime imports from Mexico. Many growers shared their concerns that allowing imports of Mexican limes would impact profitability of their farms at a time when labor is difficult to obtain and they …
CLM and Canker: Dangerous Summer Duo
Chris Oswalt details the connection between citrus leafminer (CLM) and citrus canker in the May/June Central Florida citrus Extension newsletter, Citrus from the Ridge to the Valley. He also offers some management tips. “I don’t think we can overstate the effect of leafminer damage on citrus foliage and the increased development of citrus canker lesions on damaged leaves,” the multi-county …
Unlocking the Citrus Microbiome
Yunzheng Zhang, Nian Wang and colleagues recently published an article, The Citrus Microbiome: From Structure and Function to Microbiome Engineering and Beyond, in the Phytobiomes Journal. It outlines the structure and potential functions of the plant microbiome. It explains how this knowledge can lead to new engineering feats and a greater understanding of the plant microbiome. Insights into the microbiome …
Grapefruit Challenges and Opportunities
A recent report summarizes the U.S. grapefruit market’s challenges, including citrus greening disease and hurricanes, and opportunities. Lijun (Angelia) Chen and Lisa House with the University of Florida Institute of Food and Agricultural Sciences authored the report, titled “An Overview of the Grapefruit Market in the U.S.” “The U.S. grapefruit industry has been facing fierce challenges in both production and …
Brutal Honesty on HLB
Rick Dantzler did not follow normal protocol in providing an update about his organization’s efforts. Dantzler, chief operating officer of the Citrus Research and Development Foundation (CRDF), didn’t talk glowingly about CRDF’s accomplishments. Rather, he started off by telling how far the Florida citrus industry has declined since CRDF was formed in 2009 primarily to find a solution to HLB. …
HLB Practices: Growers’ Attitude Studied
Although HLB has not yet been detected in a commercial citrus grove in California, growers have been provided with voluntary best management practices to limit the spread of HLB and the psyllids that transmit the disease. A study conducted by researchers at University of California (UC) Davis and UC Riverside, in collaboration with the Citrus Research Board, examined citrus growers’ …
Renewed Effort to Stop Chinese Citrus Imports
U.S. Senators Marco Rubio and Rick Scott of Florida recently urged U.S. Secretary of Agriculture Tom Vilsack to re-implement a prohibition on the importation of five varieties of citrus from China. The U.S. Department of Agriculture (USDA) in April 2020 decided to allow the importation of the Chinese varieties. “The USDA’s decision continues to risk an increase in unfair trade competition …
Florida Citrus Funding of $32.6 Million
Florida Gov. Ron DeSantis on June 2 approved all $32.6 million worth of citrus-related funding in the state budget, Florida Citrus Mutual (FCM) Executive Vice President/CEO Mike Sparks reported. The budget had been set earlier by the state Legislature. Sparks detailed the citrus appropriations: Citrus Research and Development Foundation (CRDF), $3 million Citrus Research and Field Trial (CRAFT) program, $5 …
Citrus Science Site Features Podcasts
Are you interested in learning more about the citrus industry’s ongoing fight to save citrus from huanglongbing (HLB) disease? Visit the Science for Citrus Health website for access to relevant and up-to-date information about control, treatment and prevention methods. The website also includes a collection of reader-friendly Research Snapshots about the new, cutting-edge tools and methods being developed by researchers …
Fruit Fly Pests of Florida Citrus
Exotic fruit flies are considered some of the most serious of the world’s agricultural pests due to their potential economic harm and threat to the food supply. They have a wide host range of fruit, vegetables and nuts. Most of Florida’s crops fall within the host range, including the fragile citrus industry. For this reason, it’s imperative to act quickly …
Making Sense of Biologicals: Biofertilizers Designed to Make Roots ‘Happy’
“If mama ain’t happy, ain’t nobody happy.” That same mindset can also be applied to agriculture. If the roots of a plant are not happy, the top of the plant won’t be happy either. Anything else will prove to be futile, believes Mark Egan. Egan, an agronomist at Douglas Plant Health, says biofertilizers are a management tactic that growers can …
Keeping HLB out of California Groves
The recent annual report from California’s Citrus Pest & Disease Prevention Program (CPDPP) offered insights into ways the state’s citrus industry has kept HLB out of commercial groves. Jim Gorden, chair of the group’s Citrus Pest & Disease Prevention Committee, stated that the California industry has “invested countless hours, leveraged millions of dollars and created dozens of innovative partnerships” in …
Citrus Australia Focuses on Biosecurity
Citrus Australia recently applauded the federal government’s additional investment in national biosecurity and stated that it will seek an opportunity for additional dialogue on enhancing plant biosecurity. The government announced $400 million in funding to enhance biosecurity over a four-year period. According to Citrus Australia, citrus exports alone are worth $500 million to the national economy annually. A pest incursion …