Last year, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) scientists offered Florida citrus growers soil and leaf testing along with tailored quarterly nutrition counseling in an effort to improve tree health. The Citrus Nutrient Management Program, more commonly known as the nutrition box program, has successfully supported 75 growers from 17 counties across the state. Michael Rogers, …
Fire Ant Management in Citrus
By Lauren M. Diepenbrock While there are many species of ants in Florida, the invasive fire ant (Solenopsis invicta) is the one most people are familiar with. These ants can be pests in agriculture, landscapes and structures. The pest’s ability to use a variety of habitats and resources makes it challenging to manage. In citrus groves, fire ants can be …
Sneak Peek: February 2021 Citrus Industry
While everyone strives to protect themselves from coronavirus disease, growers have an additional concern: protecting their trees from citrus disease. While HLB is of course the most damaging disease of citrus, there are other diseases that should not be overlooked. Disease management is the theme of the February 2021 issue of Citrus Industry magazine. University of Florida Institute of Food …
Plan Your Insect Management for 2021
By L.M. Diepenbrock Insect and mite management is a year-round challenge in Florida citrus. With the warm climate, pests are at the ready as soon as plant resources are available to them. With knowledge of insect and mite biology in relation to tree phenology, plans can be developed to protect fruit and maintain productive citrus trees. Populations of many of …
Growers Tour Indian River CUPS Houses
Citrus growers from several of Florida’s production regions joined researchers recently for a look inside 14-foot high screenhouses that protect trees from HLB-spreading Asian citrus psyllids. The CUPS (Citrus Under Protective Screens) Field Day took place at the University of Florida Institute of Food and Agricultural Sciences Indian River Research and Education Center (UF/IFAS IRREC) in Fort Pierce. Johnny Ferrarezi, …
Control Methods for Major Pests of Cold-Hardy Citrus
By Xavier Martini and Danielle Sprague Cold-hardy citrus, that is, citrus grown above the 30th parallel north, is a blooming industry. In less than 10 years, the acreage in North Florida has gone from almost nonexistent to approximately 1,000 acres. Growers in the region plan to plant more in the coming years. In Georgia, there are approximately 2,000 acres across …
All In For Citrus Podcast, January 2021
An update on the nutrition box program, shade research with some positive side effects, and a bold project analyzing compounds used against HLB headline January’s All In For Citrus podcast. The Citrus Nutrient Management Program, more commonly known as the nutrition box program, is over a year old. Citrus Research and Education Center Director Michael Rogers, with the University of …
Citrus Diseases to Pay Attention to
Phytophthora and leprosis diseases can each substantially reduce productivity of a citrus tree, but when they attack trees already weakened by HLB, the result can be fatal. Ozgur Batuman, assistant professor at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), explained how co-infection impacts HLB-infected trees during a recent UF/IFAS webinar. PHYTOPHTHORA DISEASESPhytophthora species are soil-borne fungal pathogens …
Kaolin Particle Film Reduces HLB Pressure
Researchers found use of kaolin particle film on trees reduced populations of HLB-spreading psyllids and delayed HLB infection. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) assistant professor Christopher Vincent presented his research comparing red and white kaolin particle films with foliar insecticides during a recent UF/IFAS OJ Break webinar. According to Vincent, the particles of kaolin clay …
Compost Use and Weed Management
By Ramdas Kanissery Application of compost as a soil amendment could be an integral part of citrus production’s best management practices. Compost application can potentially improve soil quality and provide additional nourishment to trees. Citrus-producing soils in Florida are generally sandy and low in soil organic matter. Compost addition tends to enhance the soil’s ability to retain both nutrients and …
La Niña and Florida Citrus
A moderate La Niña climate phase is expected through spring 2021. This indicates that slightly above average temperatures and slightly less rainfall than normal can be expected in Florida’s citrus belt. Multi-county citrus Extension agent Ajia Paolillo made that announcement during a virtual Dec. 22 OJ Break presented by the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS). …
Dormant Sprays for Asian Citrus Psyllid Management
By Jawwad Qureshi Several studies have documented the positive effects of controlling the Asian citrus psyllid (ACP, Figure 1) for citrus tree health and sustainability in Florida. The mature blocks established before and after the discovery of huanglongbing (HLB) in 2005 continue to benefit from psyllid control. One psyllid is enough to infect a tree with HLB for life, and …
Irrigation Management With Artificial Intelligence
Artificial intelligence (AI) can be an overwhelming topic, but Sandra Guzmán says it is easier to swallow when it helps growers. Guzmán, an agricultural engineering assistant professor at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Indian River Research and Education Center, has been working directly with growers to integrate the benefits of in-field technology. The influx …
Organic Acid, HLB Link Found
One obvious symptom of HLB is leaf chlorosis — yellow blotches appearing on otherwise dark green citrus leaves. Although chlorosis can indicate other health issues, in trees affected by HLB, it’s thought to be triggered by the underlying bacterial infection causing the disease. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) plant pathologist Nabil Killiny conducted a study …
Flowering Intensity, Shoot Dieback and HLB
Citrus trees grown in Florida continuously undergo various types and levels of stress. Stressors can include severe weather conditions, soil pH, chemicals, pests and diseases. The constant presence of HLB and psyllid infestation adds further stress to the tree, compromising overall tree health. Off-season flowering and prolonged flowering are common responses of trees when undergoing various stress conditions. Off-season and …
New Year’s Resolutions for 2021
By Ruth Borger It is time for a new year, and many of us cannot see 2020 end fast enough. It is almost time for 2021, and there is a lot to be hopeful for. New vaccines to fight the coronavirus hold great potential for beating the pandemic. U.S. citrus sales so far this season continue to show strong performance. …
Sneak Peek: January 2021 Citrus Industry
Now is the time of year for gifting fresh citrus to family and friends to enjoy. Unfortunately, people are not the only ones who enjoy eating citrus. Numerous pests can be found feasting on various plant parts in the grove. Keeping pests under control is the theme of the January issue of Citrus Industry magazine. Of course, the most concerning …
Update on CRISPR Research for Citrus Improvement
By Nian Wang, Fred Gmitter and Manjul Dutt Nearly all commercially important citrus types — oranges, grapefruits etc. — have originated by mutations that have accumulated over several hundreds to thousands of years, from what once was an original, individual sweet orange tree and a single grapefruit tree. The many different cultivars that we know today are descended from those …
Training Veterans for Agriculture Jobs
Veterans Florida is working with the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) to prepare former military personnel for jobs in agriculture. The organization has received a three-year, $745,000 grant from the U.S. Department of Agriculture to fund the Veterans Florida Agriculture Program (VFAP) in partnership with UF/IFAS. The program is a six-month paid fellowship designed to …
Rogers on Fruit Drop, Meetings and More
Add Michael Rogers to the list of those seeing early-season fruit drop in Florida this fall. Rogers, director of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center, saw the drop while visiting groves. In the December All In For Citrus podcast, he also addresses flower bud induction advisories and upcoming UF/IFAS presentations. …