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Below you'll find a list of all posts that have been categorized as “Tip of the Week”
By Fernando Alferez and Saoussen Ben Abdallah The risk of citrus plantings to become infected with HLB is especially high for young trees, which flush frequently and attract more psyllids than mature trees. Individual protective covers (IPCs) are now being increasingly adopted to protect newly planted citrus trees from psyllid colonization. However, even though IPCs effectively protect young trees from …
By Lauren Diepenbrock Pest management is a year-round challenge in Florida citrus. With the warm climate, pests are at the ready as soon as plant resources are available to them. With knowledge of invertebrate biology in relation to tree phenology, growers can develop plans to protect fruit and maintain productive citrus trees. HIGHLY PROBLEMATIC PESTS Populations of some highly problematic …
By Manjul Dutt, Sheetal Ramekar and Gary England Developing new citrus cultivars, whether through conventional breeding or genetic engineering methods like transgenics or CRISPR is potentially the most viable long-term strategy to combat huanglongbing (HLB). Identifying potential survivor trees — citrus trees that exhibit disease tolerance in areas with endemic HLB — can also serve as a useful strategy for …
By Ute Albrecht, Gabriel Pugina and Caroline Tardivo Two years have passed since trunk injection of oxytetracycline (OTC) was approved for HLB management in Florida. Many growers have adopted this technology. While most reported positive responses, others did not. The plant physiology team at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Southwest Florida Research and Education …
By John M. Chater and Davie Kadyampakeni Soil fertility is a keystone to a productive citrus grove in Florida. In the era of huanglongbing (HLB), the need to fine-tune soil fertility takes on even more importance. The sandy soils found in citrus-growing regions of the state are great for drainage to reduce flooding stress of citrus trees in many cases, …
By Ramdas Kanissery Spot application of post-emergent herbicides provides an effective solution for controlling weeds that are missed by standard maintenance herbicide programs in citrus groves (Figure 1, left). This method is also helpful for targeting weeds in areas that herbicide boom sprayers can’t reach, like those growing near the trees (Figure 1, right). Here are some key tips to …
By Romain Exilien and Xavier Martini Residential gardens serve as reservoirs for Asian citrus psyllids (ACP) and citrus greening disease (also known as huanglongbing or HLB) due to unmanaged citrus trees. The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) conducted a survey to assess residents’ needs regarding ACP and HLB management. The survey examined their current control …
By Tripti Vashisth University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) flower bud induction advisories for 2024–25 started on Nov. 25. The advisories will be posted bi-weekly until March 2025. The goal of the advisories is to provide growers and production managers with a complete overview of flowering prediction. Every advisory will aim to deliver recommendations for that …
By Manjul Dutt, Sheetal Ramekar and Gary England The grapefruit was created by chance from a cross between a pummelo and a sweet orange. It was first discovered in Barbados in the 18th century. All the commercially sold grapefruits today trace their roots back to the Duncan variety of grapefruit. Cultivars existing today were developed through natural and induced mutations …
By Fernando Alferez and Divya Aryal Brassinosteroids (BRs) are a class of plant growth regulators with several effects on plant growth and development. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) work in the last few years has shown that BR treatments may influence internal maturity in Hamlin sweet orange if performed at the right time. Research has …
By Ozgur Batuman, Sanju Kunwar and Ana Redondo In a promising effort to protect citrus from huanglongbing (HLB), University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers are exploring the potential of Australian lime as an interstock graft for Valencia scions with Swingle rootstock. The interstock technique uses various limes, known for their natural HLB-tolerant peptides, between the …
By Taylor O’Bannon, Clara Diekman and Michelle Danyluk In July 2024, the Food and Drug Administration (FDA) finalized changes to the Food Safety Modernization Act (FSMA) Produce Safety Rule Subpart E, which covers preharvest agricultural water. Since then, the clock has been ticking on farms’ implementation of the rule changes. Large farms have nine months after the effective date to …
By Lauren Diepenbrock and Brett Bultemeier There have been a lot of changes within the Environmental Protection Agency (EPA), so much so that it seems there is an update nearly every day! This is because the EPA had to settle a mega lawsuit dealing with endangered species. In the past, the EPA did not directly address endangered species during registration. The …
By Tripti Vashisth and Taylor Livingston Hurricane Milton passed over many citrus-producing counties in Florida, resulting in canopy and fruit loss (especially in early varieties). HLB-affected trees undergo a lot of stress, and now the hurricane has added more abiotic stress to trees. High-speed winds caused significant fruit and leaf drop. The fruit and leaves that escaped the drop during the …
By Robin Koestoyo On Nov. 7, citrus growers will join University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Assistant Professor Flavia Zambon to view new citrus varieties that show tolerance to citrus greening. Zambon will guide visitors at the 2024 Millennium Block Field Day, a walk-through interpreted tour. The Millennium Block is a seminal grapefruit trial on 20 acres …
By Christopher Vincent Hurricane Helene’s path spared most of the citrus industry the kind of trouble that Hurricane Ian brought back in 2022, but Ian taught us some important lessons you can use if your trees were hit by high winds. WIND SPEED MATTERS Trees impacted by Category 3 winds were mostly defoliated, with major limbs broken and near 100% …
By Megan Dewdney It is late summer or early fall, and the usual time to consider brown rot treatment options has passed. However, you smell a sharp fermented fruit odor. When you look closer, fruit have the telltale soft brown lesions of brown rot. What options exist to minimize losses now? It is too late for the traditional control options …
By Tripti Vashisth, Jeff Brecht, Yu Wang and Faisal Shahzad In the last decade, fruit quality and size has become a major issue. Moreover, fruit peel color is another challenge to overcome for citrus growers who intend to sell for fresh fruit consumption. Many nutrients are known to improve fruit growth and quality in citrus trees. For example, potassium increases …
By Tripti Vashisth Over the past decade, HLB-associated fruit drop has become a significant problem in Florida groves. Many growers opt to harvest the fruit before the peak fruit drop begins. However, the downside to this strategy is that the fruit does not get enough time for optimal Brix accumulation. Plant growth regulators, when applied at the right time, can …
By Michael E. Rogers The 2024 Citrus & Specialty Crop Expo, hosted by AgNet Media, took place Aug. 21–22 at the Florida State Fairgrounds in Tampa. The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) citrus educational sessions were held during the afternoon of the first day of the event and in the morning on the second day. …
