By Nabil Killiny and Christopher Vincent The citrus industry has suffered numerous setbacks over the past 20 years because of the devastating effects of huanglongbing (HLB) disease. Many options for controlling the disease are being investigated to make groves as productive as possible under the current HLB pressure. Even small improvements in tree health or yield of diseased trees may …
Updates on Irrigation and Nutrient Management
Proper irrigation and nutrient management are necessary to maximize root density and tree health, especially in trees infected with HLB. Davie Kadyampakeni, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) assistant professor, shared a few irrigation and nutrient research updates during the March episode of the All In For Citrus podcast. IRRIGATION RECOMMENDATIONS Young citrus trees require optimal …
Managing Citrus Root Pests
Nematologist Larry Duncan discussed efforts to control the root pests sting nematode and Diaprepes root weevil in his presentation during the virtual April 6 Florida Citrus Growers’ Institute. Duncan works at the University of Florida Institute of Food and Agricultural Sciences’ (UF/IFAS) Citrus Research and Education Center. The sting nematode and Diaprepes are especially concerning in the age of HLB, …
Soil Moisture Sensor Q&A
By Sandra Guzman Understanding how to obtain and interpret data from soil moisture sensor (SMS) systems is crucial for efficient irrigation management. These systems help create an efficient and informed irrigation schedule based on soil moisture readings collected from the field. Below are answers to some common questions about managing SMS systems, including how to view SMS data on a …
Managing Asian Citrus Psyllid with RNA Interference
Researchers at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) are using RNA interference (RNAi) to alter field populations of the Asian citrus psyllid (ACP). Nabil Killiny, UF/IFAS associate professor, shared the latest findings from his team’s RNAi research in a recent All In For Citrus podcast episode. He says the team is using RNAi to attack …
Economically Sustainable Psyllid Control
Spraying for the HLB-spreading Asian citrus psyllid (ACP) is essential for HLB control even when virtually all trees are already infected with the disease. Entomologist Lukasz Stelinski made that declaration early in his virtual presentation at the April 6 Florida Citrus Growers’ Institute. Stelinski is an entomologist at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus …
Trials to Seek Hamlin Alternative
Twenty-four citrus scions were approved by the Citrus Research and Development Foundation (CRDF) on March 23 for eventual use in multiple field trials around Florida. The purpose of the trials will be to find an early-season orange that is more tolerant of HLB disease than Hamlin, said CRDF Chief Operating Officer Rick Dantzler. Hamlin has long been the primary early-season …
Managing Pests in a CUPS System
Citrus under protective screen (CUPS) does a great job of safeguarding trees from the HLB-spreading Asian citrus psyllids. However, CUPS does not protect trees from all other pests. The benefits of eliminating HLB are immediate and include rapid, normal tree growth, higher yields of premium-quality fruit and less fruit drop. Since CUPS is a relatively new system, researchers are still …
Tweaking the Sunshine for Better Citrus Health and Yield
By Christopher Vincent, Anirban Guha, Joon Hyuk Suh and Yu Wang It may surprise you to learn that citrus trees can get too much sunshine in the Sunshine State. Manipulating the light environment around a plant can have several surprising benefits. Shade can suppress the HLB cycle and enhance citrus health and yield. Overall, a mildly shaded citrus plant is …
Scouting Tips for Finding Asian Citrus Psyllids
A presentation at the recent Citrus Pest & Disease Prevention Committee State of the Central Valley meeting in California highlighted the importance of scouting for Asian citrus psyllids (ACP) in groves. Scouting becomes even more critical as the risk of ACP and HLB, the disease the insect transmits to trees, rises. The presenter, University of California (UC) Riverside Extension Specialist …
Making Sense of Biologicals: Crop Optimization With Seaweed
Sometimes growers must think outside the box to remain sustainable amid high input costs and devastating diseases. That is the situation facing citrus growers who are struggling to remain viable in the era of citrus greening. What if seaweed could be used to aid in the quality of citrus production? Seaweed is a biostimulant that is part of the biological …
EPA Sued Over Streptomycin in Citrus
A coalition of groups on March 25 sued the Environmental Protection Agency (EPA) for approving spraying of streptomycin on citrus trees to prevent or treat HLB or citrus canker. The groups claimed that the practice of spraying antibiotics on trees has been ineffective in combating the diseases and can drive antibiotic resistance in bacteria, which can threaten human health. The …
Task Force Recommendations for ACP in Kern County
The San Joaquin Valley ACP/HLB Area-Wide Task Force strongly recommends citrus growers in Kern County, California, to add an Asian citrus psyllid (ACP)-effective material to their pre-bloom or spring foliar treatments. Since ACP build populations on the young leaf flush, the sooner growers spray, the better. Fortunately, this timing coincides with pre-bloom treatments for katydid, worms, thrips and other pests. …
Florida Citrus Growers’ Institute Returns
The annual Florida Citrus Growers’ Institute, hosted by University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Extension, will be held on April 6. The event will be delivered via a Zoom webinar from 8:30 a.m. to 12:00 p.m. “We hope to reach a broad audience despite the limits imposed on us because of the COVID-19 pandemic,” said Chris …
CRDF Selects Research Topics
Citrus Research and Development Foundation (CRDF) directors on March 23 voted to request research proposals from scientists in nine topic areas for the coming year. The nine areas, mostly focusing on HLB, are: Understanding the mechanisms for increasing fruit retention in HLB trees by manipulating hormonal balance in the fruit and the tree or by altering the relationship between vegetative …
Sneak Peek: April 2021 Citrus Industry
Ask any Florida citrus grower what the top priority is, and you’ll likely get the same answer: Keeping HLB-affected trees productive and profitable. The April issue of Citrus Industry magazine provides research on production practices aimed to meet this goal. Adjusting the amount of sunlight plants receive has proven to increase citrus tree health and yield. University of Florida Institute …
The Do’s and Don’ts of Spraying for Psyllids
Psyllid sprays have been a point of contention for Florida citrus growers. Under endemic HLB conditions, high psyllid control costs have cut into the grower’s bottom line, which has already been hit by reduced production. So, what is the right time to spray and how can a grower remain sustainable and profitable? Lukasz Stelinski, University of Florida professor of entomology …
Protecting Honey Bees in Citrus Groves
By Sylvia Willis, Amy Vu and Jamie Ellis When people think of Florida, the first thing that comes to mind is Fresh From Florida oranges. Florida accounts for 44 percent of total U.S. citrus production. Citrus, like many other fruits, vegetables and specialty crops, requires certain inputs to grow and produce fruit. But how are pollinators and the production of …
All In For Citrus Podcast, March 2021
March’s All In For Citrus podcast brings news of in-person events, details on controlling the vector of HLB disease, as well as potential changes to nutrient and water management recommendations. Citrus Research and Education Center Director Michael Rogers begins the episode discussing several upcoming events for growers. On April 6, the Florida Citrus Growers’ Institute will return as a virtual …
Highlands County Youth Citrus Project Winners
Rylan Turner’s tree was crowned Grand Champion of the Highlands County Youth Citrus Project, and Christopher Garrison’s tree garnered the Reserve Grand Champion award. Those two trees were sold in a live auction during the livestock auction night at the Highlands County Fair on Feb. 18. Lykes Bros. purchased the Grand Champion tree for $1,400 and Big T Tire bought …