Sponsored Content Q: With the 2025–26 trunk-injection season near, what steps can be taken to make the ReMedium TI® injections the most effective for increased fruit yield and quality? A: The basics of the injection are still the same: There is one factor that is new in the injection realm. Research conducted at the University of Florida shows that injection …
Influence of Rootstock and OTC Injection on Valencia Yield
By Kim D. Bowman, Ute Albrecht and Caroline Tardivo Profitability of citrus in Florida has been severely reduced by the impact of huanglongbing disease (HLB). Previous studies have demonstrated that rootstock selection and injection of established trees with oxytetracycline hydrochloride (OTC) can both significantly improve the health, cropping and fruit quality of trees affected by HLB. However, neither a superior …
The Potential of Trunk Injection for Fresh Market Citrus
By John M. Chater Citrus tree trunk injection of antibiotics has been recently and widely used in Florida. The success of oxytetracycline (OTC) in sweet orange to mitigate huanglongbing (HLB or citrus greening) disease has been documented by the laboratory of Ute Albrecht, associate professor at the University of Florida. Some results suggest that OTC injection can improve Brix, ratio, …
Recommendations for Oxytetracycline Injections
Three University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers recently issued the document Suggested Use Pattern of Injectable Antimicrobials for Huanglongbing (HLB) Management. The authors are Ute Albrecht, associate professor of horticulture; Ozgur Batuman, associate professor of plant pathology; and Megan Dewdney, associate professor of plant pathology. The antimicrobials for Florida citrus are ReMedium TI and Rectify; …
Injection Month Affects Fruit Size, Juice Quality and OTC Residues
By Ute Albrecht, Gabriel Pugina, Caroline Tardivo, Jasmine de Freitas and Deived de Carvalho The month during which oxytetracycline (OTC) injections are performed can have a considerable impact on fruit size, juice quality and OTC fruit residues. Citrus fruit development can be divided into three overlapping stages: If injections are performed during Stage I, they promote cell division, which increases …
Trunk-Injection Biopesticide for HLB
Ching-Hong Yang, University of Wisconsin-Milwaukee (UWM) biological sciences professor, was recently awarded a $1.5 million federal grant to support research on a compound that suppresses HLB disease. His project is titled Bringing RejuAgro to Market: Development of a Groundbreaking Trunk Injection Biopesticide for Huanglongbing (HLB). The grant is from the U.S. Department of Agriculture National Institute of Food and Agriculture …
OTC Injections Spark Optimism
It can be hard to have hope if you are a farmer in today’s agricultural climate. It can be even harder to have optimism if you are a Florida citrus grower. Yet, Matt Joyner, Florida Citrus Mutual executive vice president and chief executive officer, has hope that the industry is trending upward even amid HLB and multiple hurricanes in previous …
Highlands Citrus Banquet Highlights Trunk-Injection Research
The Highlands County Citrus Growers Association hosted its annual banquet on March 6 in Sebring. The event drew a good crowd to catch up on the association’s activities. Two of the featured speakers during the event discussed alternative trunk-injection therapies to the current standard of oxytetracycline (OTC). Tanishka Aglave, a sophomore at Strawberry Crest High School, received the H. Robert …
Lessons From Oxytetracycline Injection Trials
By Ute Albrecht, Carol Tardivo, Gabriel Pugina, Larissa Nunes, Jasmine de Freitas and Gerardo Moreno Since the approval of oxytetracycline (OTC) injection to manage citrus greening (huanglongbing, HLB) in Florida, the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) plant physiology team at the Southwest Florida Research and Education Center (SWFREC) has completed various research trials with multiple …
Making the Most of ReMedium TI® Injections
Sponsored Content In this special series, Tom Johnson, owner of TJ BioTech, tackles questions about optimizing trunk-injection applications to treat HLB. Q: How do I get the best performance out of my ReMedium TI® injections? Tom Johnson: Getting the most out of your ReMedium TI® injections begins by properly evaluating individual tree size and tree health. While that may sound …
Grower Meeting Features Trunk-Injection Results and Hurricane Relief
Florida Citrus Mutual hosted a grower informational meeting on Nov. 13 at Kenny and Cookie Sanders’ Grove House in Zolfo Springs. About 80 citrus growers gathered for the event to hear more about the latest research on trunk-injection therapy and discuss recovery efforts after Hurricane Milton. Ute Albrecht, associate professor of plant physiology with the University of Florida Institute of …
Ongoing Research Shows the Promise of Trunk-Injection Therapy
Trunk injection of oxytetracycline (OTC) has been the center of attention in Florida citrus for the past two years since the Environmental Protection Agency registered formulations of the material for use. But experience with antibiotics in Florida citrus is not new. That was part of the message Lukasz Stelinski delivered to attendees of the Citrus & Specialty Crop Expo in …
The Good, the Bad and the Ugly: Optimizing OTC Injections
By Ute Albrecht, Caroline Tardivo, Larissa Nunes, Gabriel Pugina, Gerardo Moreno and Jasmine de Freitas As growers are well into the second year of oxytetracycline (OTC) injections since approval for commercial use, more and more data are accumulating. The good news is that in all University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) trials, trees have been responding …
Tree Age and Trunk-Injection Effectiveness
Sponsored Content In this special series, Tom Johnson, owner of TJ BioTech, tackles questions about optimizing trunk-injection applications to treat HLB. Question: It is known that ReMedium TI® is working to fight HLB in young trees. Are ReMedium TI® injections proving to be effective in older citrus trees? Answer: ReMedium TI® is indeed effective in older citrus trees. The caution …
Tree Age and Yields: Implications for Trunk Injection
By Ariel Singerman This article examines the impact of HLB and other factors on yield by tree age group in Florida using U.S. Department of Agriculture statewide average data from 1994 to 2021. To focus on the impact of HLB and other relevant lasting factors, seasons in which there were hurricanes or freezes are excluded. YIELD REDUCTIONS Figures 1 and …
Maximizing the Value of a Trunk-Injection Product
Sponsored Content In this special series, Tom Johnson, owner of TJ BioTech, tackles questions about optimizing trunk-injection applications to treat HLB. Q: What is the proper way to handle and inject ReMedium TI® to get the most value from the product? Tom Johnson: Because purity matters, it is important to purchase a trunk-injection product for HLB control in citrus that …
Talking Trunk Injection at Citrus & Specialty Crop Expo
The educational program on the first day of the Citrus & Specialty Crop Expo focused on trunk injection of oxytetracycline (OTC) being applied to citrus to treat HLB. Trees have received their second OTC treatment, and growers are hopeful trees will respond with better fruit retention and improved quality. Ute Albrecht, University of Florida Institute of Food and Agricultural Sciences …
Purity Is a Two-Part Consideration in Trunk Injection
Sponsored Content In this special series, Tom Johnson, owner of TJ BioTech, tackles questions about optimizing trunk-injection applications to treat HLB. Q: Is there more to the purity of a trunk injection of ReMedium TI® than just the purity of the active ingredient? Tom Johnson: The purity of a trunk injection is important to the overall performance of the active …
Survey Asks Growers About Oxytetracycline Trunk Injection
University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers are conducting a grower survey about the use of oxytetracycline (OTC) trunk injection in citrus production. The researchers want to learn about the adoption, efficacy and economic feasibility of OTC injections. The survey, which can be accessed here, will take approximately 15 minutes to complete. It should be completed …
Low pH Does Not Cause Tree Injury in Trunk Injections
Sponsored Content In this special series, Tom Johnson, owner of TJ BioTech, tackles questions about optimizing trunk-injection applications to treat HLB. Q: Some are suggesting that oxytetracycline injections may be creating tree injury due to low pH. What have you learned about this from your ongoing research? Tom Johnson: A substantial amount of research has been conducted by TJ BioTech …

























