HLB, irrigation, nutrition

New Indian River Researcher to Aid in HLB Fight

Ernie NeffHLB Management, Irrigation, Nutrition

Rhuanito “Johnny” Ferrarezi, a new citrus horticulture scientist at the Indian River Research and Education Center near Fort Pierce, discusses his research plans. “I’m going to be focusing on irrigation, plant nutrition and cultural practices to improve our current practices and try to maximize plant survival under greening conditions,” he says. Most of his attention will be on Indian River …

HLB, Replanting

Nurseryman Discusses HLB and Replanting Choices

Ernie NeffHLB Management, Rootstocks, Scions

As a member of a grower panel at the recent Florida Citrus Show in Fort Pierce, nurseryman Nate Jameson shared his thoughts on coping with HLB, choosing trees for replanting and more. The owner of Brite Leaf Citrus Nursery summarizes his presentation, starting with questions growers have for nurserymen. “I think the number-one question that we get is, ‘What tree …

FDOC

Hancock on HLB: ‘I Think We’re Winning a Few Battles’

Ernie NeffCitrus Greening, HLB Management

Ned Hancock, a citrus grower and Florida citrus commissioner, shares thoughts about HLB, including the lack of consumer awareness of the disease and how growers are coping. At the Florida Citrus Commission meeting on January 18, the Florida Department of Citrus staff reported that only 1 percent of American consumers are aware of HLB. Hancock says he would have been …

HLB

How Negative Results in HLB Research Can Help Growers

Ernie NeffCitrus Greening, HLB Management

“Everyone wants to see positive results when we do a test” to see if something helps battle HLB, says Harold Browning, chief operations officer of the Citrus Research and Development Foundation. But, he adds, “not everything we test … is going to be able to solve this problem for us, though it may contribute in a small way.” He made …

CRDF Panel Considers a “One-Two Punch” at HLB

Ernie NeffCitrus Greening, HLB Management

A panel of the Citrus Research and Development Foundation (CRDF) in December discussed combining thermotherapy and bactericides in field trials in an effort to fight HLB. Most Florida growers used bactericides throughout 2016, and several growers have experimented with thermotherapy over the last few years. CRDF Chief Operations Officer Harold Browning discusses the concept of combining the two HLB therapies: …

UF Researcher Discusses HLB-Tolerant Scions

Ernie NeffCitrus Greening, Scions

University of Florida researcher Jude Grosser told growers about new HLB-tolerant scions at this summer’s Citrus Expo. He summarizes his discussion in this report. “Without question, the most tolerant scion that we have is a fresh market tangelo that we call Sugar Belle,” Grosser says. “It’s very similar to Minneola, but matures a little bit earlier and so it can …

HLB Management in Brazil

Tacy CalliesCitrus

Observations and lessons learned from a recent citrus grower tour By Stephen H. Futch In June 2016, a group of Florida citrus growers and industry representatives embarked on a trip to tour the Brazilian citrus industry. The primary purpose of the trip was to learn more about how huanglongbing (HLB or citrus greening) is being managed in Brazil and how …

HLB

Update on Approval of Bactericides for HLB

Ernie NeffBactericides, HLB Management

Many Florida citrus growers consider the bactericides that they’ve been applying this year to be their best hope in the fight against HLB. Temporary use of the bactericides was approved this spring by Florida Commissioner of Agriculture Adam Putnam. The industry is seeking Environmental Protection Agency (EPA) approval for continued use of the products. Harold Browning, chief operations officer of …

Researcher: Well-Managed Trees Can Do OK with HLB

Ernie NeffHLB Management

Although a field trial indicates that microbial soil amendments didn’t seem to help trees with HLB, the trial project manager sees a take-home message for growers. That message is that “well-managed trees can continue getting along OK,” says Jim Syvertsen, a scientist with the Citrus Research and Development Foundation. Syvertsen summarizes results he presented at a recent field day in …

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,” …

Update on $9 Million NuPsyllid Effort Against HLB

Ernie NeffCitrus Greening, HLB Management, Pests

Citrus Research and Development Foundation (CRDF) Chief Operations Officer Harold Browning provides an update on a major five-year HLB project that CRDF is managing. “It’s (NuPsyllid) a project that started in 2012, involving a team of scientists from all over the country … And the goal is to build and release into the field the psyllid that has less capacity …

budget

HLB and Genetic Engineering: The FDOC’s Role

Ernie NeffCitrus Greening, Genetic Engineering

Communicating about genetic engineering as a partial solution to greening disease (HLB) was the topic of a recent OJ break in Sebring. Florida Department of Citrus (FDOC) Executive Director Shannon Shepp participated in the meeting and discusses the FDOC’s role in telling consumers about greening. “We’re very clear on the fact that biotechnology research is happening … We know that …

HLB management

Managing HLB Horticulturally

Ernie NeffCitrus Greening, HLB Management

University of Florida researcher Tripti Vashisth at Citrus Expo in August discussed the horticultural steps that can best help growers with managing HLB. She summarizes her presentation in an interview with Citrus Industry magazine. “The most important thing with managing HLB-affected groves is you want to fertilize your groves with good nutrition,” she says. She also emphasizes the need for …

HLB, genetic engineering

Genetic Engineering for HLB – the Growers’ Role

Ernie NeffCitrus Greening, Genetic Engineering, HLB Management

Citrus growers can play a vital role in promoting genetic engineering as a partial solution to HLB, University of Florida Horticultural Sciences Department Chairman Kevin Folta says. He summarizes a message he delivered to about 40 at a Highlands County OJ break in Sebring on November 17. “There are many great innovations at the University of Florida and other places” …

HLB, psyllids

HLB-Spreading Psyllids: Dormant Sprays and the Edge Effect

Ernie NeffCitrus Greening, HLB Management, Pests

University of Florida entomologist Phil Stansly discusses the use of dormant sprays for HLB-spreading psyllids. He also addresses the fact that psyllid populations are often higher on grove perimeters — the so-called “edge effect.” Stansly says the next coordinated grower spray for psyllids in the Gulf citrus-growing region will be a dormant spray. “The trees are dormant now and that’s …

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 …

HLB replanting

Citrus Replanting Incentives in Face of HLB

Ernie NeffCitrus Greening, Water

More than 50 attended a November 1 workshop in Lakeland to learn about incentives to induce citrus tree replanting. Replanting is needed to replace trees lost to HLB and other problems. Kayla Nickerson of the Florida Department of Agriculture and Consumer Services (FDACS) talks about a relatively new incentive – her agency’s Citrus Grove Renovation/Re-establishment Support Program. Nickerson says, “We’re …

Managing the Health and Productivity of HLB-Affected Groves

Tacy CalliesHLB Management

By Tripti Vashisth In 2005, huanglongbing (HLB or citrus greening disease) was first discovered in Florida. Florida orange production changed from 242 million boxes in the pre-hurricane, pre-HLB, 2003–2004 season to 81.5 million boxes in 2015–2016. This dramatic reduction in yield is attributable to multiple causes, including a reduction in citrus acreage, citrus canker and other citrus diseases. HLB is …

HLB

Some Growers ‘Being Squeezed More than Others’ by HLB

Ernie NeffBactericides, HLB Management, PFD

Citrus Extension agent Steve Futch answers questions following a grower forum in Arcadia on October 27. Growers discussed production, bactericides for HLB and much more. The forum opened with one grower saying he doesn’t know how much longer he can keep going. Another reported per-acre orange production of 450 to 500 boxes in some blocks – a superb level in …

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 …