By Tacy Callies Citrus growers and researchers alike are learning more about the role intensive nutrition management plays in keeping HLB-infected trees productive. The March issue of Citrus Industry magazine provides two features on nutrition management. The first is a foliar nutrition research update from a team of University of Florida scientists. The article offers a summary of results on …
Tools for Integrated Management of Citrus Psyllids and Leafminers
By Jawwad A. Qureshi, Philip A. Stansly and Lukasz L. Stelinski Pest management has always been important for citrus production in Florida. It has become even more critical following invasion of the Asian citrus psyllid (ACP) and citrus leafminer (CLM), due to their association with huanglongbing (HLB or citrus greening) and canker diseases, respectively. ACP and CLM develop and reproduce …
Psyllid Protection by Photonic Fence Under Development
By next year, a fence utilizing light sources is expected to be available to help protect some citrus structures and maybe even grove perimeters from the HLB-spreading psyllid. U.S. Department of Agriculture research entomologist Joe Patt explains the technology. “Photonic fence is a multi-modal system that uses several different types of light in order to detect, track, identify and, if …
USDA Invests in Fighting Citrus Greening Disease
The U.S. Department of Agriculture’s (USDA) National Institute of Food and Agriculture (NIFA) announced awards to combat citrus greening disease. The funding to support research and Extension programs is made through the emergency Citrus Disease Research and Extension Program (CDRE). CDRE was authorized as part of the 2014 Farm Bill. “The need to advance research and Extension to develop management …
Cold-Tolerant Citrus Industry Update
Two University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) professionals spoke at the recent Cold-Tolerant Citrus Production for the Southeastern Coastal Plain event about the current state of the industry. UF/IFAS entomologist Xavier Martini said he has seen growth in interest for cold-tolerant citrus between 2016 and 2017. He also said he has seen an increase in the …
California Citrus Research Board: Serving Growers for 50 Years
By Len Wilcox The grower-funded California Citrus Research Board (CRB) is celebrating its 50th anniversary this year. Headquartered in the Central Valley city of Visalia, under the direction of president/CEO Gary Schulz, the CRB awards more than $7 million each year to researchers throughout California. Since 2008, CRB has focused much of its efforts on huanglongbing (HLB), with approximately $33 …
Tools for Growing Citrus in the HLB Era
Economist Tom Spreen thinks advanced production systems (APS) and citrus under protective screen (CUPS) offer hope for some growers in the face of HLB. Spreen, a University of Florida Institute of Food and Agricultural Sciences professor emeritus, discussed APS and CUPS at a recent Gulf Citrus Growers Association economic seminar in LaBelle. Spreen says growing with APS “means you have …
Sneak Peek: January 2018 Citrus Industry Magazine
Citrus Industry magazine subscribers have one more Christmas present to open. The January issue comes packaged with a complimentary copy of a brand new magazine, Vegetable and Specialty Crop News. Brought to you by AgNet Media, VSCNews is geared to growers in the Southeast. It contains production-related information as well as updates on big-picture agricultural issues like trade reform and …
Psyllid Control Strategies
University of Florida Institute of Food and Agricultural Sciences entomologist Jawwad Qureshi discussed several means of Asian citrus psyllid control at Citrus Expo in August. He provides an overview of his presentation. Qureshi says it is best to start psyllid sprays during the winter dormant period. “Do it individually or do it in a collaborative effort, but you must do …
Update on Citrus Undercover Production Systems Research
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 …
What Lies Ahead for Florida Citrus?
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) …
A Look Back at 100 Years of Citrus Innovation
By Beverly James, Alec Richman, Brad Buck, Samantha Grenrock and Tom Nordlie The year was 1917. In April, the United States entered World War I. Florida’s population was fast approaching 1 million, and agriculture was the state’s most important economic driver. Citrus cultivation, introduced to Florida 400 years earlier by Spanish explorers, had spawned an industry following the Civil War. …
Citrus Production in Argentina
By Stephen H. Futch and Ariel Singerman In May of 2017, we visited the northwestern citrus production region of Argentina in the provinces of Jujuy, Salta and Tucumán. The purpose of the trip was to learn more about Argentina’s citrus industry and programs being developed to deal with both the Asian citrus psyllid (ACP) and huanglongbing (HLB). Argentina has a …
Keep Spraying Psyllids in HLB-Infected Groves
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 …
Impact of Temperature on Psyllid Survival
By Nabil Killiny and Steve Futch Citrus growers frequently inquire if Florida temperatures in the summer or winter are sufficiently high or low enough to control or suppress the Asian citrus psyllid (ACP). This question is the subject of this short article. The reason growers pose the question about how temperature impacts psyllids is because ACP is a phloem feeder …
Bactericides, Psyllids and HLB-Resistance/Tolerance
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 …
System Screens Out Citrus Greening-Carrying Insect
Imagine camping in the deep woods. You’d want a tent with mesh that prevents bugs – even those as small as gnats – from entering into your wildlife hangout. That’s the idea behind citrus under protective screens, or CUPS, which helps keep away a pinhead-sized insect that causes citrus greening, University of Florida/Institute of Food and Agricultural Sciences (UF/IFAS) scientists …
Grower Response to Psyllid Insecticide Resistance
Lee Jones was in the Citrus Expo seminar audience recently when a scientist reported there have been incidences of HLB-spreading psyllids being resistant to insecticides. Jones, general manager of Gardinier Florida Citrus, has one recommendation for dealing with the issue, at least partially. “I would really suggest that October to March window as an application window for the imidacloprids (a …
HLB-Spreading Psyllids Resistant to Insecticides
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 …
HLB Found in California Citrus Birthplace
A citrus tree in the city of Riverside tested positive for huanglongbing (HLB) disease. The detection is the first case of HLB found in a major citrus-producing county and the most northern in California. The California Department of Food and Agriculture (CDFA) confirmed the detection of HLB disease in a sample taken from a grapefruit tree located in a Riverside …




























