Walls Aim to Keep Psyllids Out

Ernie NeffHLB Management, Psyllids


Walls consisting of insect-proof screen held up by telephone poles hold promise for helping growers reduce the cost of controlling HLB-spreading psyllids. The walls serve as artificial windbreaks in a new model grove planted in June at the Citrus Research and Education Center (CREC). The grove was one of numerous projects viewed by more than 500 attendees who came to … Read More

Millennium Block Resurrected for HLB Research

Ernie NeffGrapefruit, HLB Management


An approximately 35-acre research plot that fell victim to citrus canker years ago will soon become a new research site helping growers pick trees that fare best with HLB. The plot at the Indian River Research and Education Center (IRREC) in Fort Pierce will keep its former name, the Millennium Block. University of Florida Institute of Food and Agricultural Sciences … Read More

Update on Citrus Undercover Production Systems Research

Tacy CalliesHLB Management

By Arnold Schumann, Laura Waldo, Alan Wright and Rhuanito Ferrarezi  Authors’ note: This article was written before Hurricane Irma passed through Florida. We are still assessing the full impact and implications of storm damage to both University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) citrus undercover production systems (CUPS) facilities and will provide updates in future articles. Citrus … Read More

California Ag Chief Prepared to Battle HLB

Len WilcoxCalifornia Corner, HLB Management

citrus greening

In an interview at the Citrus Research Board’s (CRB) annual conference last month, Karen Ross, secretary of the California Department of Food and Agriculture (CDFA), said the present status of huanglongbing (HLB) disease is similar to another disease that challenged the California citrus industry years ago. Pierce’s disease was a potentially devastating threat long before HLB. “One of the things … Read More

For HLB: ‘We’ve Done Everything That Could Be Done’

Ernie NeffCitrus Greening, HLB Management


The long-time project manager for the Citrus Research and Development Foundation (CRDF) says the group formed to find solutions to HLB has done the best it can. Tom Turpen with Technology Innovation Group was recently honored for his service, which is being curtailed. Turpen actually began work with CRDF’s predecessor, the Florida Citrus Production Research Advisory Council, soon after HLB … Read More

Replanting Trees in the Face of HLB

Ernie NeffCitrus Greening, HLB Management, planting


  At Citrus Expo, Aaron Himrod of Himrod Citrus Nursery made the case for replanting citrus trees lost to HLB and other causes. “I think growers need to replant because we are having some success with young trees that we’re not having with older trees,” Himrod said. “The young trees are responding a lot better to our treatments. And we … Read More

What Lies Ahead for Florida Citrus?

Tacy CalliesDiseases, HLB Management, Pests, Varieties

Editor’s note: This article is part of the special coverage on the 100th Anniversary of the UF/IFAS Citrus Research and Education Center, found in the October 2017 issue of Citrus Industry magazine. By Tom Nordlie Although it’s difficult to predict future events, directors of the University of Florida Institute of Food and Agricultural Sciences Citrus Research and Education Center (CREC) … Read More

CRDF Update on NuPsyllid Project and More

Ernie NeffHLB Management, Psyllids

Citrus Research and Development Foundation (CRDF) Chief Operations Officer Harold Browning reports on the conclusion of the five-year NuPsyllid project aimed at developing a psyllid that won’t spread HLB. “The NuPsyllid project was a project funded through the USDA competitive grant program and was established in 2012 to develop a psyllid that would not be capable of transmitting the (HLB-causing) … Read More

Gmitter on Surviving HLB, What to Plant and Lemon Potential

Ernie NeffHLB Management


In a wide-ranging talk at Citrus Expo in August, University of Florida Institute of Food and Agricultural Sciences researcher Fred Gmitter discussed many topics important to growers. Subjects included making variety decisions when planting, surviving HLB, and the potential for lemons in Florida. He summarizes his discussion: “We can give information (about citrus varieties), but we don’t want to give … Read More

Keep Spraying Psyllids in HLB-Infected Groves

Ernie NeffHLB Management, Psyllids


  In a Citrus Expo talk, University of Florida Institute of Food and Agricultural Sciences entomologist Phil Stansly focused on the importance of continuing to spray psyllids in groves already infected with HLB. The main reason to do that, he says, is to keep psyllids from re-inoculating trees with HLB by “pumping more and more bacteria into that tree.” He … Read More

Organic Management for HLB

Abbey TaylorCitrus Greening, HLB Management, Organic

citrus greening

By Jaci Schreckengost One of the topics researchers and growers discussed at the 2017 Organic Food & Farming Summit was what can be done organically to combat huanglongbing (HLB), also known as citrus greening disease. Florida Organic Growers hosted the summit in Gainesville. It featured many workshops in which researchers and growers could discuss challenges and management practices. Tripti Vashisth, … Read More

Hurricane Recovery Hotline for Citrus Growers

Tacy CalliesHLB Management


As growers assess the damage from Hurricane Irma, University of Florida/Institute of Food and Agricultural Sciences (UF/IFAS) citrus specialists are available to answer their questions related to hurricane recovery practices for HLB-affected citrus groves. To provide answers as quickly as possible, the UF/IFAS Citrus Growers’ Hotline (863-956-8611) has been established for growers to call with their questions. Staff will be answering the … Read More

Growers Report on Use of Bactericides for HLB

Ernie NeffBactericides, HLB Management


Ariel Singerman, economist with the University of Florida’s Institute of Food and Agricultural Sciences, reports on a grower survey he conducted regarding use of bactericides against HLB. “According to my survey, which included 62 growers accounting for approximately 160,000 acres, 92 percent of the growers applied bactericides,” Singerman says. “The majority did three applications, and they spent between $100 and … Read More

Grower Jerkins Revises Stance on Bactericides

Ernie NeffBactericides, HLB Management


At Citrus Expo in August, Premier Citrus President Tom Jerkins clarified comments about bactericides and their effectiveness that he made at the June Florida Citrus Mutual conference in Bonita Springs. “In Bonita Springs, I kind of stated publicly it was difficult for Premier to see a difference in the treated (with bactericides) versus untreated,” Jerkins says. “I said it was … Read More

Bactericides, Psyllids and HLB-Resistance/Tolerance

Ernie NeffBactericides, HLB Management, Psyllids


At a recent meeting of the Citrus Research and Development Foundation’s (CRDF) Commercial Product Delivery Committee, approximately half of the agenda was devoted to bactericides and HLB-spreading psyllids. Reflective mulch that keeps psyllids away and field trials for HLB-resistant or tolerant rootstocks and scions were also addressed. CRDF Chief Operations Officer Harold Browning summarizes some of the discussions. “The issue … Read More

HLB-Spreading Psyllids Resistant to Insecticides

Ernie NeffHLB Management, Psyllids


Ears perked up in the Citrus Expo seminar hall last week when Lukasz Stelinski reported incidences of Asian citrus pysllid resistance to insecticides, “particularly the neonicotinoid group of insecticides in Florida.” The neonicotinoids have been a key weapon against the psyllids that have spread HLB to groves statewide. Stelinski, an entomologist with the University of Florida’s Institute of Food and … Read More

Rootstocks and HLB Tolerance — Another Perspective

Tacy CalliesHLB Management, Rootstocks

By Ute Albrecht Tolerance to a disease is generally defined as the ability to be productive in the presence of disease-causing organisms. This is contrary to resistance, which is defined as the ability to completely evade a pathogen due to specific resistance mechanisms. The question as to what defines an HLB-“tolerant” rootstock was posed in an article by Bill Castle, … Read More

CRDF and Bayer Announce Partnership at Citrus Expo

Tacy CalliesCitrus, HLB Management, Industry News Release

The Citrus Research and Development Foundation (CRDF) and Bayer CropScience announced a new partnership at Citrus Expo. In an effort to discover new technologies to manage citrus greening disease, CRDF will invest $12 million with Bayer over a three-year period. Bayer will focus on product research and development of both biological and chemical controls. Adrian Percy, head of research and … Read More

How the Best Growers Cope with HLB

Ernie NeffBactericides, Citrus Greening, HLB Management


  Some of Florida’s “best” citrus growers recently told Citrus Research and Development Foundation (CRDF) researcher Jim Syvertsen how they try to cope with HLB. There was much agreement among the growers on fertilization, irrigation, the management of psyllids that spread HLB, and bactericides that have been used against HLB for more than a year. Syvertsen says a survey conducted … Read More

Management Plan for Roots of HLB-Infected Trees

Abbey TaylorCitrus Greening, HLB Management

HLB management

By Jaci Schrekengost As huanglongbing (HLB) continues to decimate citrus crops, researchers continue to search for new, efficient ways growers can manage the disease. HLB, also known as citrus greening disease, is vectored by the Asian citrus psyllid. The disease affects the entire tree, including the roots and fruit. Tripti Vashisth, assistant professor and citrus Extension specialist at the University … Read More