A Grower’s Plan to Survive HLB

Ernie NeffHLB Management

HLB

An Indian River-area grapefruit grower told the crowd at Florida Citrus Mutual’s recent annual conference about his company’s plans for coping with HLB. The plans include replanting with some diverse citrus varieties at higher densities, said Daniel Scott, vice president of Scott Citrus Management. Grapefruit has for the most part proven extremely difficult to grow profitably in the face of … Read More

Extra Manganese and Boron for HLB

Ernie NeffHLB Management

Research

University of Florida Institute of Food and Agricultural Sciences researcher Jude Grosser discusses small experiments that indicated manganese and boron can help citrus trees cope with HLB. In a greenhouse experiment from a few years ago, HLB-infected sweet orange trees were overdosed with micronutrients and secondary nutrients. “It looked like … manganese had the biggest effect on growth of the … Read More

Zinkicide Could Help Manage HLB

Ernie NeffHLB Management

HLB

University of Florida Institute of Food and Agricultural Sciences researcher Evan Johnson reports that the product Zinkicide appears promising as a management tool for HLB. “Zinkicide is a zinc-based nanoparticle that is designed to become systemic inside the tree and has high bactericidal activity so that hopefully it can target Liberibacter,” Johnson says. Liberibacter is the causal agent of HLB. … Read More

Rucks on Citrus Varieties and Industry Recovery

Ernie NeffHLB Management, hurricane, Varieties

HLB

Phil Rucks of Phillip Rucks Citrus Nursery weighs in on the increasing demand for late versus early orange varieties, the impact of Hurricane Irma and HLB. Rucks notes that over the past 30 years, the demand for early-season oranges versus late-season oranges has essentially reversed. In the past, he says, early varieties accounted for about 60 percent of plantings. Now, … Read More

For Psyllids, Kaolin Clay Beats Foliar Insecticides

Ernie NeffHLB Management, Psyllids

psyllids

University of Florida Institute of Food and Agricultural Sciences researcher Christopher Vincent says kaolin clay outperforms foliar insecticides for management of HLB-spreading psyllids at times when kaolin’s use is practical. His presentation on the topic followed the Citrus Research and Development Foundation (CRDF) meeting on May 22 at the Citrus Research and Education Center in Lake Alfred. The presentation, part … Read More

Citrus Greening, CRDF and the National Academy of Sciences

Ernie NeffHLB Management

HLB

Citrus Research and Development Foundation (CRDF) Vice President and Governance Committee Chairman Rick Kress comments on a recent National Academy of Sciences (NAS) report regarding HLB and CRDF. He says NAS reported that CRDF has pursued all angles on HLB, also known as citrus greening, and declared there won’t be a single solution or cure. When NAS worked with CRDF … Read More

Researchers Find How HLB Bypasses Citrus Immune System

Len WilcoxHLB Management

citrus greening

Researchers at the University of California, Riverside (UCR) claim they have made an important step in understanding the molecular mechanism of huanglongbing (HLB). They believe they have found the mechanism by which the disease evades detection and destruction by the natural immune system of citrus trees. HLB, or citrus greening disease, has devastated groves in Asia, South America and the … Read More

HLB-Tolerant Interstocks

Ernie NeffHLB Management

The use of highly HLB-tolerant genotypes as interstocks on a tree with a Swingle rootstock and a Valencia scion infected with HLB is offering hope for help against HLB, Jude Grosser reports. Grosser is a plant breeder with the University of Florida Institute of Food and Agricultural Sciences at the Citrus Research and Education Center in Lake Alfred. “Virtually every … Read More

CRDF Focuses on HLB Research Communication

Ernie NeffHLB Management, Research

HLB

The Citrus Research and Development Foundation’s (CRDF) board of directors, which is focused on HLB, discussed ways to improve communications with growers and others during a meeting in Immokalee on Tuesday. The directors asked numerous growers attending the meeting at the Southwest Florida Research and Education Center for their input regarding improved communication. One grower said he needs more detail … Read More

Grower Discusses HLB Management Strategies

Ernie NeffHLB Management, Psyllids

HLB

Jim Snively, vice president of grove operations at Southern Gardens Citrus, discusses his company’s management of HLB and the psyllids that spread it. He summarizes a presentation he made at the International Citrus Business Conference in March. “By reducing stress, the trees can deal with disease much better,” Snively says. “We’re doing this through continuous-type feeding or frequent feeding with … Read More

Imidacloprid Alternatives for Psyllid Control

Ernie NeffHLB Management, Psyllids

HLB

Phil Stansly, University of Florida Institute of Food and Agricultural Sciences entomologist, discusses alternatives to imidacloprid for helping to control HLB-spreading Asian citrus psyllids (ACP). “Imidacloprid of course is typical of the neonicotinoids that we’ve been using as soil applications to protect young trees,” Stansly says. “We’ve seen and the growers have seen, too, that soil applications of systemic insecticides … Read More

USDA Researcher: Bactericides Increase Yields

Ernie NeffBactericides, HLB Management

bactericides

Several trials indicate that after one year of application, bactericides increase citrus yields in HLB-infected trees compared to non-treated controls, a U.S. Department of Agriculture researcher reported Tuesday at the Florida Citrus Growers’ Institute. But the researcher, Robert Shatters, says the results are variable. “We’ve seen three studies now, done totally separately in different ways, and they all show about … Read More

‘Flip’ Psyllid Control for Better HLB Management

Ernie NeffHLB Management, Psyllids

HLB

Mike Irey of Southern Gardens Citrus explains why he thinks “flipping” the standard focus of psyllid control from young trees to mature trees can actually help young trees grow stronger in the face of HLB. Irey, director of research and business development, spoke at the recent International Citrus Business Conference in Daytona Beach. Irey explains that HLB is spread two … Read More

Nutrition and HLB

Ernie NeffHLB Management, Nutrition

morgan

University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) professor Kelly Morgan discusses the importance of nutrient leaf concentrations in HLB-infected citrus trees. “The leaf concentration (of nutrients) is reduced in all HLB trees,” he says. “We’ve known that for a long time, since HLB was found in Florida.” Morgan, who works at the Southwest Florida Research and Education … Read More

Spoon-Feeding Nutrition and Protecting New Flush for HLB

Ernie NeffHLB Management, Nutrition

Research

Spoon-feeding nutrients through root systems and protecting new leaf flushes are among ways Jude Grosser believes growers can maintain tree health in the face of HLB. Grosser, a University of Florida Institute of Food and Agricultural Sciences professor, is best known as a citrus breeder. Grosser said he started working with nutrition because “like any grower, I don’t like to … Read More

Hall of Famer Kahn: HLB Will Be Overcome

Ernie NeffHLB Management

Sebring grower and grove manager Marvin Kahn, one of two inducted into the Florida Citrus Hall of Fame on March 9, says the industry will survive greening disease, or HLB. “I’m sure that we’ve got a real handicap now with this greening disease,” Kahn says. And no doubt we could have other diseases even following it. But with a real … Read More

Browning to Take New Role in HLB Battle

Ernie NeffBactericides, HLB Management

HLB

Citrus Research and Development Foundation Chief Operations Officer Harold Browning will resign at the end of March to pursue HLB control strategies for Premier Citrus ApZ, a branch of Vero Beach-based Premier Citrus. At his new position, Browning says he will work “on further testing and commercialization of strategies to control HLB in the field.” Specifically, Browning will work with … Read More

Nurseryman Discusses HLB, Grapefruit and Lemons

Ernie NeffGrapefruit, HLB Management, lemons

HLB

The impact of HLB on total citrus tree propagations, including the decline in grapefruit and growth in lemons, is addressed by nurseryman Nate Jameson. Jameson, owner of Brite Leaf Citrus Nursery, discusses some points he made at the annual Florida Citrus Show in January. “A few years ago we were propagating about 4.7 million trees a year,” Jameson says. “We’re … Read More

California Researchers Work Toward Early HLB Detection

Abbey TaylorCitrus Greening, Diseases, HLB Management

hlb

Although the Florida and California citrus industries may differ, they are both vulnerable to citrus greening disease. The brightest minds from both states are working to detect, manage and control this devastating disease. Most recently, University of California researchers have been working to find methods for early detection of huanglongbing (HLB), or citrus greening disease. AgNet West’s Taylor Hillman has … Read More

HLB Conference to Be Held in California

Len WilcoxHLB Management

citrus greening

The sixth International Research Conference on Huanglongbing (IRCHLB VI) will be held in California. The conference has been scheduled for March 12-16, 2019, at the Riverside Convention Center in Riverside. This is the first time the conference will be held in California. Sponsored by the California Citrus Research Board (CRB) with the support of California’s citrus industry partners, the gathering … Read More