In the latest All In For Citrus podcast, Ozgur Batuman talks about his research into biological control of the Asian citrus psyllid (ACP). Batuman is an assistant professor at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Southwest Florida Research and Education Center. ACP control is necessary for management of citrus greening disease, or huanglongbing (HLB). Batuman’s …
A Closer Look at CUPS-Grown Grapefruit
By Arnold Schumann, Ariel Singerman and Yu Wang Grapefruit production in Florida has been drastically reduced by huanglongbing (HLB) disease, from 40.9 million boxes in 2003–04 to 4.5 million boxes in 2018–19, according to the U.S. Department of Agriculture. Grapefruit varieties are particularly vulnerable to HLB due to cumulative losses from stunted tree growth, low fruit yield, high-percentage fruit drop, …
Viruses in the Gut of Asian Citrus Psyllid: Friends or Foes?
By Ozgur Batuman and Amit Levy Management options for huanglongbing (HLB) are limited and rely heavily on insecticides for controlling Asian citrus psyllid (ACP) populations, even when integrated with other cultural control methods. Chemical strategies are expensive and, if not rotated, can contribute to the development of chemical resistance among ACP populations. In some cases, long-term chemical applications may have …
California and Florida Collaborate on HLB Research
University of California, Riverside (UCR) professor Georgios Vidalakis recently provided an update on the state of California citrus for researchers in Florida. Vidalakis is a noted professor and Extension specialist in UCR’s Microbiology and Plant Pathology Department. Among other honors, he was recently named Presidential Researcher for Sustainable Citrus Clonal Protection. Vidalakis pointed out that California has benefited greatly from …
Aiming to Improve Production of Florida Grapefruit
(UF/IFAS) — Dinesh Phuyal, who is pursuing a master’s degree in horticultural sciences from the University of Florida’s College of Agricultural and Life Sciences, recently garnered a prestigious Yara North America Crop Innovation Scholarship. The award is Phuyal’s fourth academic honor this year for his efforts to improve Florida grapefruit tree size, fruit yield and fruit quality. Phuyal studies higher …
Citrus Rootstock Guide Updates Available Online
(UF/IFAS) — Florida’s citrus growers may now access the updated Florida Citrus Rootstock Selection Guide, which is more user- and mobile-friendly. Revisions include current University of Florida rootstock horticultural traits, three new rootstocks that tolerate citrus greening and an updated bibliography. “The fourth edition of the Florida Citrus Rootstock Selection Guide has a new look and information for a comprehensive description …
Rubio Secures Funding for Citrus Greening
The Senate passed an appropriations minibus package that included critical funds for Florida secured by Senator Rubio (H.R 3055, Commerce, Justice, Science, Agriculture, Rural Development, Food and Drug Administration, Interior, Environment, Transportation, and Housing and Urban Development Appropriations Act of 2020). In his role on the Senate Appropriations Committee, Senator Rubio secured major funds for Florida’s citrus industry: $8.5 million …
UF/IFAS Adds Fourth Citrus Nutrition Workshop
Responding to strong grower interest, the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) has added a fourth event to its roster of citrus nutrition workshops this fall. The event happens 9:30 a.m. to 1 p.m. on Friday, Nov. 8, at the UF/IFAS Extension Highlands County office in Sebring. For more information, visit citrusnutritionprogramsebring.eventbrite.com. Admission is free and …
IPCs for HLB Prevention in Young Trees
By Fernando Alferez, Susmita Gaire, Ute Albrecht, Ozgur Batuman, Jawwad Qureshi and Mongi Zekri Controlling the Asian citrus psyllid vector of huanglongbing (HLB) is critical, especially in young trees. Reducing HLB incidence is essential for tree survival and productivity under current endemic conditions. Individual protective covers (IPCs) are a novel strategy based on psyllid exclusion by means of a protective …
New Grapefruit Rootstock, Scion Experiment
The world’s peerless grapefruit grows in the Indian River Citrus District. Balanced with sugar and tart, and a thin rind for easy peeling, the fruit is sold mostly for export to European and Asian markets, where it is a high-price delicacy. But the once-thriving industry is in decline, and a plant pathogen is present in all of the state’s grapefruit …
Does Reducing Psyllids Help When HLB Is Present Everywhere?
By Freddy Ibanez, Nabil Killiny, L. Gene Albrigo and Lukasz L. Stelinski With both Asian citrus psyllids (ACP) and huanglongbing (HLB) distributed throughout Florida groves, there is no longer a need to slow the spread of the disease. So, it is logical to ask whether reducing vector numbers is still something that is worth pursuing, given the investment needed in …
Martin Named New California CRB President
Marcy L. Martin was named the new president of the Citrus Research Board (CRB). The appointment was announced by CRB Chairman Dan Dreyer, who said that Martin was selected after a nearly year-long national search for the best candidate to lead the organization. Martin joins the CRB with more than 25 years of experience with California commodity organizations. She most …
Citrus Research Facility Opening Set
Sept. 26 will be the official opening day for a new bio-safety citrus research facility at the University of California, Riverside (UCR). A ribbon-cutting ceremony and other activities are scheduled to highlight the day. Members of the California Citrus Research Foundation, California Citrus Mutual (CCM) and the Citrus Research Board will be in attendance. The facility was funded by California …
Sugar Belle® Shows Potential in Orange Juice Processing
By Yu Wang, Charles Sims, Zhifeng Gao, Lisa House, Frederick Gmitter and Jude Grosser The citrus industry has faced significant declines in both production and consumption during the huanglongbing (HLB) era. For example, Florida orange production has dropped about 70 percent over the last two decades. In the absence of effective interventions, the spread of HLB will continue to reduce the …
Researchers to Look Deeper Into HLB Management
By Karla Arboleda University of Florida Institute of Food and Agricultural Sciences researchers are getting ready to conduct several trials on tools used to protect young citrus trees from HLB. The team of five researchers will receive $665,471 in funding from the U.S. Department of Agriculture for experiments at the Citrus Research and Education Center (CREC) in Lake Alfred. Lauren …
Manipulating Flowering for Better Grove Management
By Tripti Vashisth, Garima Singh and Megan Dewdney Citrus trees grown in the field undergo various types and levels of stress continuously. The stressors can be several things, including heat, cold, drought, soil pH, chemicals, pests and diseases. The constant presence of huanglongbing (HLB) and psyllid infestation adds stress to the trees, which compromises the plant response and makes the …
Oxytetracycline Sprays vs. Trunk Injections
Since 2016, federal authorities have allowed Florida citrus growers to spray oxytetracycline solutions on their trees to combat citrus greening disease. A newly published University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) study suggests that the bactericide would be more effective if it were injected into citrus tree trunks, a practice not currently approved under U.S. law. Citrus …
The Real Cost of HLB in Florida
By Ariel Singerman This article summarizes the major changes in the cost of production for processed oranges in Florida since the outbreak of huanglongbing (HLB). To deal with the disease, growers have significantly changed their cultural practices. Those changes have had a considerable impact on the cost of production per acre. NOMINAL COSTS VS. REAL COSTSHowever, given that inflation also …
The Facts on Preharvest Fruit Drop
By Tripti Vashisth, Lisa Tang and Sukhdeep Singh In citrus, huanglongbing (HLB) causes an increase in the mature fruit drop rate up to three months prior to commercial harvest. This preharvest fruit drop results in a great reduction in yield and overall grove productivity. Since the plant growth regulators that improve fruit retention on healthy trees do not have consistent …
Citrus Research at SWFREC
Southwest Florida Research and Education Center (SWFREC) Director Kelly Morgan provides an update on citrus research being conducted at the center. SWFREC is operated by the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS). Morgan says most of the research is “related to greening, but not all of it.” Greening is another term for huanglongbing (HLB), the citrus …





























