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Below you'll see everything we could locate for your search of “hlb”
By Megan M. Dewdney Algal spot has not been seen frequently for many years, but in the last few years I have been getting more questions about identification and management. The disease is caused by a green alga, Cephaleuros virescens. The alga is not considered a parasite, as it grows superficially, but it does cause damage to trees if left …
The March issue of Citrus Industry magazine focuses on fertilization and other production practices to keep citrus trees healthy. Tripti Vashisth’s article summarizes a three-year University of Florida (UF) study that looked at 10 different controlled-release fertilizer treatments in two different locations. The research results revealed that when it comes to citrus nutrition, one size does not fit all. Surprisingly, …
A sheet of “Nutrient Management Concept Questions” was passed out at the January Citrus Research and Development Foundation (CRDF) board meeting in Fort Pierce. It included questions that growers and researchers have agreed need to be answered in future nutrition-related research funded by CRDF. Rick Dantzler, CRDF chief operating officer, explains how the questions were developed. “We had a Nutrition …
This month’s podcast includes three timely interviews on topics of interest to the citrus industry. Citrus Research and Education Center Director Michael Rogers gives an update on the Citrus Nutrition Box Program that started last fall, including the individualized nutrition recommendations being made by University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) experts. Rogers also shares the latest …
University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) geneticist and plant breeder Jude Grosser discusses the need for new juice oranges and some new cultivar choices. Grosser says one reason for new varieties is the decline in orange juice sales. “In my opinion, the best way to combat that is to have a higher quality orange juice that’s …
Evan Johnson, a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) plant pathologist at the Citrus Research and Education Center, updates efforts to help citrus tree roots cope with HLB. He starts by noting that around 10 years ago he and former UF/IFAS researcher Jim Graham discovered “that HLB causes severe damage to the root system.” They hoped …
Over 200 people from the citrus industry and University of California (UC) Riverside gathered on Jan. 29 for Citrus Day. Growers and scientists alike were informed about the current status of huanglongbing (HLB) disease and the tiny insect that spreads it, the Asian citrus psyllid (ACP). The consensus of the speakers was that while HLB is a serious threat to …
By Megan Dewdney and Evan Johnson In 2019, the trend of fewer problems with foliar fungal diseases for Florida citrus continued, which was good news for the industry. Despite the El Niño conditions during the spring, little postbloom fruit drop (PFD) was observed because the temperatures were low (< 75 F) when it rained during bloom. The southern parts of …
(USDA/ARS) — Dogs specially trained by Agriculture Research Service (ARS) scientists have proven to be the most efficient way to detect huanglongbing— also known as citrus greening — according to a paper just published in the Proceedings of the National Academy of Sciences. Currently, the only solid hope of curtailing the spread of citrus greening is to eliminate trees with the …
Citrus under protective screen (CUPS) and young trees covered with individual protective covers (IPCs) have generally been well protected from HLB-spreading Asian citrus psyllids, but not from all other pests. Entomologist Jawwad Qureshi says the psyllids only get to trees when a CUPS structure or IPC is damaged, as happened to CUPS during Hurricane Irma in 2017. “Otherwise they do …
The mission of the California Department of Food and Agriculture (CDFA) is to promote and protect the food supply, enhance trade and protect the environment. The agency annually provides information on the steps it takes to fulfill its mission goals. In such a diverse and highly populated state, the challenges are great. Much of the growing regions are geographic islands …
The first episode of the year of the All In For Citrus Podcast includes efforts to get research information out to growers, threshold numbers on production costs that are a little shocking with current juice prices the way they are, nutrition programs that continue to help manage HLB-affected trees, and breeding work to solve citrus challenges. Senior Correspondent-at-Large Ernie Neff …
One of Lauren Diepenbrock’s props at a Jan. 14 OJ break at the Citrus Research and Education Center was a paper plate bearing the message “Easy diagnostic: smashed lebbeck mealybug = purple guts.” Diepenbrock, a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) entomologist, explains the meaning of the plate’s message. UF/IFAS researcher Lance Osborne found a lebbeck …
New sweet orange cultivars for processing can be harvested throughout the Florida citrus season. By Jude Grosser, Fred Gmitter and Bill Castle Florida orange juice has always been the gold standard among the growing portfolio of fruit juices and blends available to consumers. However, the now endemic citrus greening disease or huanglongbing (HLB) threatens this status by causing reduced fruit …
Multi-county citrus Extension agent Chris Oswalt took several baggies of soil to an OJ break he hosted Jan. 14 at the Citrus Research and Education Center. He inserted a handheld pH meter into the soil in one of the baggies and within seconds told watching growers the content’s pH level. “Soil pH is real important, especially with HLB-infected trees today,” …
By Nabil Killiny A dynamic research collaboration between several labs at Washington State University (Gang, Beyenal and Omsland labs), University of Arizona (Brown lab) and University of Florida (Killiny lab) recently reported an important step in the long-sought culture of the bacterium [Candidatus Liberibacter asiaticus (CLas)] associated with huanglongbing (HLB). The work, published in the journal Biofilm, describes a new …
The Citrus Research and Development Foundation (CRDF) has spent $149 million during 10 years of existence, Chief Operating Officer Rick Dantzler reports. He adds that 457 projects have been funded. Dantzler made a report on total CRDF activities to the group’s board of directors in November. He also announced a new slate of CRDF officers. “This has been quite an …
By Lukasz L. Stelinski and Jawwad A. Qureshi Getting rid of Asian citrus psyllids (ACP) from your grove is almost like trying to remove the sand from a beach. You can make a huge noticeable impact, but getting every last grain of sand will be impossible. What makes the prospect of ACP management so complex is achieving it in a …
Two growers participating in a Dec. 16 program about local agricultural issues shared some of the best management practices (BMPs) their companies employ. The event was hosted by the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Southwest Florida Research and Education Center (SWFREC) in Immokalee. Danny Sutton, president and general manager of Alico Citrus, said Alico sprayers …
Soil organic matter benefits citrus, but there isn’t much of it in Florida groves, says University of Florida Institute of Food and Agricultural Sciences soil microbiologist Sarah Strauss. Most Florida citrus land typically contains only 1 to 2 percent soil organic matter, says Strauss, who works at the Southwest Florida Research and Education Center. “Areas near the Everglades with muck …
