Dual Treatment Tested for HLB Trees

Tacy CalliesCitrus, Nutrition

Severe pruning combined with enhanced foliar nutrition did not prove cost-effective. By Monica Ozores-Hampton, Fritz Roka, Robert Rouse and Pamela Roberts Citrus trees affected by huanglongbing (HLB) become diminished, weak and develop dieback resulting in reduced production. Decline in fruit yield ultimately prevents economically acceptable commercial citrus production. Pruning and spraying foliar nutritionals are two practices being considered to restore …

HLB

Growers Share HLB Frustrations and Experiences

Ernie NeffBactericides, HLB Management, Psyllids

Growers shared their frustrations and experiences with HLB at a May 4 grower roundtable meeting in Wauchula. Event co-host Steve Smith, executive director of Peace River Valley Citrus Growers Association, summarizes the discussions. “A lot of the growers were talking about fertigation and how much, and what’s working for them on the short-term basis as far as tree health goes,” …

Insight on Improved Management of HLB-Affected Trees

Josh McGillIrrigation, Nutrition

Recent studies shed light on foliar nutrient and irrigation practices. By Kelly T. Morgan and Said Hamido Most citrus growers are well aware that citrus greening (HLB) is one of the most devastating citrus diseases in many parts of the world. The disease is widespread in Florida, Texas, Brazil, Mexico and other major production areas, causing significant concerns about the …

Growers

What Growers Say and Hear at Mutual Meetings

Ernie NeffBactericides, Legislative

Florida Citrus Mutual has been cooking for its grower members, hearing what’s on their minds and telling what the association is doing for them at area meetings this spring. At a recent meeting in Bartow, Mutual CEO Mike Sparks summarized what growers are talking about, and what Mutual is telling the growers. “The entire citrus industry knows we’re still in …

Searching for Citrus Varieties Resistant to HLB

Len WilcoxCalifornia Corner, Research

Three old trees at the Lindcove Research and Extension Center (REC) might hold the key to huanglongbing (HLB) resistance, according to an article in the University of California (UC) publication California Agriculture. The Lindcove REC is located on the eastern edge of the San Joaquin Valley near Visalia, California. Several of the citrus varieties tested at Lindcove REC were bred …

Safeguarding Citrus Stock

Tacy CalliesCitrus Greening, Regulation

By Georgios Vidalakis On March 30, 2007, I received a memorable phone call in my office at the University of California (UC), Riverside. “Georgios,” said the caller, “The 2008 Farm Bill will establish the National Clean Plant Network (NCPN) for specialty crops. This program will be like no other because it will be driven from the ground up. The system …

Finger Lime Could Be New Crop for Citrus Growers

Tacy CalliesBreeding

By Manjul Dutt, Ethan Nielsen and Jude Grosser The finger lime is a citrus relative, scientifically named Microcitrus australasica. Finger limes are native to Australia and are so named because the fruits are long and fingerlike in shape (see figures 1 and 2). Finger limes belong to a group of similar citrus relatives, all originating from Australia with common names …

Freeze Damage Symptoms and Recovery for Citrus

Tacy CalliesFreeze Protection, Weather

By Mongi Zekri, Chris Oswalt, Steve Futch and Laurie Hurner The extent of cold injury to citrus depends on a number of factors, and its expression may occur over an extended period of time. Factors responsible for freeze damage include minimum temperature, duration of freezing temperatures and stage of tree acclimation. Susceptibility of trees to freezing temperatures can also be …

Citrus Research and Education Center Starts Centennial Celebration

Tacy CalliesCitrus

GAINESVILLE, Fla. — Nearly a century ago, a group of Polk County citrus growers raised about $14,000 to buy land for a research station. Now, the University of Florida/Institute of Food and Agricultural Sciences (UF/IFAS) will celebrate the 100th anniversary of the Citrus Research and Education Center (Citrus REC). In 1917, UF/IFAS established the Citrus REC. Originally, only a few …

A Holistic Approach to Production

Tacy CalliesCitrus Greening, PFD

By Owen “Sonny” Conner EDITOR’S NOTE: Citrus Industry magazine is providing a platform for growers to express their experiences and share their stories as we unite in the quest to fight HLB and bring the citrus industry back to a healthy condition. The views stated in this article are those of the author and do not represent those of AgNet …

citrus greening

USDA Invests in Citrus Greening Research

Daniel CooperCitrus Greening, Industry News Release

The U.S. Department of Agriculture’s (USDA) National Institute of Food and Agriculture (NIFA) today announced four grants totaling more than $13.6 million to combat a scourge on the nation’s citrus industry, citrus greening disease, aka huanglongbing. The funding is made possible through NIFA’s Specialty Crop Research Initiative Citrus Disease Research and Extension Program, authorized by the 2014 Farm Bill. Sponsored …

Research Update: Citrus Undercover Production Systems and Whole Tree Thermotherapy

Tacy CalliesCitrus

By Arnold Schumann, Laura Waldo and Alan Wright Research for producing huanglongbing (HLB)-free fresh Florida citrus with covered production systems began at the University of Florida/Institute of Food and Agricultural Sciences (UF/IFAS) Indian River Research and Education Center in 2013 and at the Citrus Research and Education Center (CREC) in 2014. These citrus undercover production systems (CUPS) evolved from the …

microbes, HLB

Results of Microbial Soil Amendments in HLB-Infected Grove

Ernie NeffCitrus Greening, HLB Management

Approximately 40 people trekked into a Premier Citrus Management grove in Saint Lucie County on December 6 to learn that microbial soil amendments haven’t increased yields in an HLB-infected grove. Daniel Bott, Premier Citrus division manager for approximately 5,000 acres, including the trial site off Indrio Road, comments on the results. “There seems to be some differentiation between the products,” …

From Planning to Planting: Establishing New Groves in the Presence of HLB

Tacy CalliesCitrus

By Ute Albrecht Despite the constant threat of huanglongbing (HLB), most growers remain optimistic and are replanting citrus trees to maintain production levels necessary for sustaining the industry. The tax incentive bill under the Emergency Citrus Disease Response Act introduced in December 2015, if implemented, will help growers get back expenses associated with replanting of diseased trees immediately, instead of …

Fresh Oranges on a tree.

Analyzing Volatile Organic Compounds to Detect HLB

Kayla MercerCitrus, Citrus Greening

Another early detection and screening process for HLB has been developed at the University of California, Davis. Cristina Davis, professor of mechanical and aerospace engineering, is using volatile organic compounds (VOCs) as indicators of disease in trees. VOCs are odors that are emitted by all living things. These odors can be very meaningful, because they are distinctively different between a …

Controlling HLB with Thermotherapy: What Have We Learned So Far?

Tacy CalliesCitrus Greening, Thermotherapy

By Reza Ehsani, Megan Dewdney and Evan Johnson In the last two years, many growers looked at thermotherapy as a way of keeping HLB-affected citrus trees in production until a more permanent solution could be developed. It has been shown that thermotherapy can kill HLB-causing bacteria under controlled environments. But the exact time and temperature is not known, and it …

Pruning to Rehabilitate HLB-Affected Sweet Orange Trees

Josh McGillCitrus

By Tripti Vashisth and Troy Gainey In the last 11 years, Florida orange production has declined more than 60 percent. This dramatic reduction in yield is attributable to multiple causes, including loss of citrus acreage in the state, citrus canker and other diseases, but huanglongbing (HLB) is now recognized as the primary reason for declining citrus yields. HLB-affected trees are …

Strauss Joins UF/IFAS Fight Against Citrus Greening

Kelsey FryAgriculture, Citrus Greening

A new researcher has joined the University of Florida’s fight against citrus greening, which has devastated the state’s industry. Sarah Strauss, a soil microbiologist most recently from Davis, California, has accepted a position at the University of Florida/Institute of Food and Agricultural Sciences (UF/IFAS) Southwest Florida Research and Education Center in Immokalee. Strauss, an assistant professor with an Extension appointment, …

Rubio, Nelson Urge Senate Leaders To Address Citrus Greening in Tax Legislation

Kelsey FryAgriculture, Citrus, Citrus Greening

  RUBIO, NELSON URGE SENATE LEADERS TO ADDRESS CITRUS GREENING IN TAX LEGISLATION LATER THIS YEAR (Washington, D.C.- July 21, 2016: News Release from office of Sen. Rubio) – U.S. Senators Marco Rubio (R-FL) and Bill Nelson (D-FL) today urged Senate leaders of both parties to make citrus greening a priority in tax legislation expected to be considered by Congress …

Use of Compost in Citrus

Kelsey FryCitrus

On May 31 in Bushnell, the University of Florida’s Institute of Food and Agricultural Sciences (UF/IFAS) and Life Soils hosted a field day on the use of compost in citrus. Monica Ozores-Hampton was the featured speaker of the event. She is known as Florida’s “Compost Queen” from her UF/IFAS and US Composting Council research and workshops on compost utilization. She …