This project from the Citrus Research and Education Center (CREC) will survey citrus groves across the state to assess Hurricane Ian’s impact and how quickly the trees recover from it. We hope the results of these surveys will help you better understand the medium-term impacts of hurricanes based on windspeeds. Other goals for the project include equipping you with knowledge to develop plantings that are more resilient against storms. We hope this information can help with recovery, both now and in the future. Overall, we hope this knowledge will be applicable and useful for growers to protect their groves from storm damage. To do this we will be surveying your groves monthly to measure over time the impact of Hurricane Ian.
A hurricane damaged tree and a tree involved in the study.
This is the first update that will summarize the results of the surveys and share their potential application for grower practices. Results will eventually be published in Citrus Industry Magazine as well. An EDIS document for grower use will also be published in late 2023 outlining how to make plantings more resilient, recover from wind damage, and predict the severity of the damage on their groves based on the storm.
For questions or more information, please contact project leader Christopher Vincent at email@example.com.
We are excited to share our results with you over the next year. Please share this blog with anyone who also might find this information pertinent!
Huanglongbing (HLB; “citrus greening disease”) is currently the biggest threat to the Florida citrus industry. HLB has caused declines in citrus production and has infected trees at a rate of 100%. Insecticides reduce Asian citrus psyllid, the pest that transmits HLB, but they don’t prevent more psyllids from moving into the planting, and they often kill the pest after transmission. This is why growers need non-insecticidal prevention options. One of these options is to apply kaolin particle films on trees to help manage psyllids.
Kaolin particle films cover the natural color of the plants, which is what ACP are attracted to. White kaolin was already known to reduce ACP, but this study tested whether red kaolin may also help mitigate ACP. ACP are attracted to the blue and ultraviolet light in the leaves and red was thought to further reduce this. We made the kaolin red by taking naturally white kaolin and mixing in a dye and a binding agent, resulting in a pinkish color.
This field study tested the effect red and white kaolin particles had on ACP pressure over the course of two years. The particles were added to the leaves of young non-bearing Hamlin trees. Another set of trees were treated with foliar insecticide and one control set received no treatments.
Overall, trees with red kaolin had the lowest number of ACP. Trees with white kaolin had less than the trees with foliar insecticide. The control trees had the most ACP. Important to note, none of the kaolin treatments completely prevented ACP from infecting trees but merely slowed the infection down. The onset was slower in red trees than white. These findings indicate that kaolin particle films may be an alternative pest management to foliar insecticides when it comes to reducing ACP and slowing HLB infection.
Here Monique Rivera, entomologist at UC Riverside, and Christopher Vincent, physiologist at UF, discuss using particle films in citrus management. At some point I make a particularly effusive gesture, and smack my fancy microphone and lose sound for a minute. What can I say physiology is just too exciting to keep my hands down!
Fasih Khalid came to CREC from Pakistan for a six-month program to work as a horticulturist focused on stress physiology. He also wanted to learn about physiological techniques and how to use different instruments. In Pakistan, he spent time working on abiotic stresses like water deficits and salinity. In our lab, he worked on experiments dealing with sap flow and hydraulic conductance. He said with the results the lab can determine whether “the sap flow movement is OK in relation to the regular irrigation.” Because of rising prevalence of water deficit problems in the world, it is important to see how irrigation levels in plants can be adjusted to save water and lead to more efficient water practices in the future.
Fasih loves research and learning. After his Master’s he spent about a month working in a farmer’s co-op in Pakistan, which he didn’t enjoy. As soon as an opportunity presented itself, he entered his PhD. He had done research on lychee in his Master’s and had published it, so he decided to go back to school and into the research field. After a couple of months in his PhD, he decided “…there is nothing in the world for me except research. I have to be researching.” He initially was interested in horticulture after going through his required two years of studying it in Pakistan. He thought he wanted to work in floriculture and landscaping but ultimately found pomology to be the most engaging because there are many different opportunities in that field. Plus, “The good thing of fruit is you can research or if you don’t want to research you can eat.”
During his time at CREC, he was also able to participate in several competitions, most of which were academic, though one was a t-shirt design contest for CREC, which he won! The academic competitions allowed Fasih to share the work he did at CREC, as well as help him improve his English. He liked to share that his work is important because it helps growers understand how to adapt to a world with climate change. He believes it is important for all people, not just growers, to care about changing water conditions and how this affects plants because “…we have to save water for the world and for the plants, for the next [plants].” If growers are unable to find solutions for their plants in water scarce conditions, this will cause further problems for the world as demand for fresh water reserves increases, eventually affecting our food supply, which would affect us all. He wants to take the things he’s learned during his time here back to Pakistan. His two big takeaways were time efficiency and the benefits of using hydraulics instrumentation for research. He hopes to apply these lessons as he continues horticulture research in the future.