 |  |  |  |  |  |  |  |  |
Below you'll find a list of all posts that have been categorized as “Tip of the Week”
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. …
By Amir Rezazadeh The giant swallowtail butterfly (Papilio cresphontes) is a beautiful insect, admired for its large wingspan and vibrant yellow and black coloration. However, for citrus growers, this butterfly is often viewed with less enthusiasm. The larvae of the giant swallowtail, commonly referred to as “orange dogs,” can cause significant damage to citrus trees. Understanding the nature of this …
By Davie Kadyampakeni, Tripti Vashisth and Duplicate Sambani The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) conducted an experiment for four and a half years to determine effects of soil amendments on soil pH. The impacts of fulvic acid, humic acid and sulfuric acid with and without elemental sulfur were compared. Canopy size, fruit yield, fruit quality, …
By Michael E. Rogers Do you plan to attend the Citrus & Specialty Crop Expo on Aug. 21–22 at the Florida State Fairgrounds in Tampa? If so, you’ll want to stop by the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Extension booth to pick up the latest publication on HLB management assembled by UF/IFAS citrus experts. …
By Jamie D. Burrow and Michaela Ivy Since the spring, planning has been underway for the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) citrus Extension team booth to be on display at the Citrus & Specialty Crop Expo. The event is Aug. 21–22 at the Florida State Fairgrounds in Tampa. The booth will be in the same …
By Ramdas Kanissery Managing weeds during the summer is crucial for Florida citrus. However, due to the high temperatures typical of Florida’s summer months, several factors must be considered when using herbicides in citrus groves during hot weather. INCREASE EFFECTIVENESS High heat and drought stress can slow plant growth and affect how herbicides move or translocate in weeds. When temperatures …
By Davie Kadyampakeni, Muhammad Shahid and Alisheikh Atta Current citrus nutrient guidelines are based on studies of healthy citrus trees conducted in the pre-huanglongbing (HLB) era. These guidelines may no longer be valid for the present situation where 100% of mature citrus trees in Florida are HLB-affected. Scientists at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) …
By Brett Bultemeier and Lauren Diepenbrock The status and availability of chlorpyrifos has had numerous, and at times, confusing changes due to new rules, court rulings and Environmental Protection Agency (EPA) decisions. The point of this article is to clearly define if chlorpyrifos can be used and until what date. As always, changes are possible in the future and users …
By Chris Oswalt During this time of the year, Florida growers should be aware of the potential for the development of citrus brown rot disease. It can infect fruit at color break. If severe, the disease can cause a significant amount of infected fruit to drop. For this reason, groves with a history of brown rot in areas that recently …
By Jawwad Qureshi The Asian citrus psyllid (ACP, Figure 1) is the vector of huanglongbing (HLB) disease associated with the phloem-limited bacterium Candidatus Liberibacter asiaticus. Infected trees start to decline and produce poor-quality fruit, which drops prematurely. Consequently, citrus production has decreased dramatically since the advent of HLB in Florida in 2005. There is no cure for the disease yet. …
By Davie Kadyampakeni and Miurel Brewer Row middle management is a key area that can improve tree performance. Row middles encompass 80% of citrus orchards, and 70% of the root system of citrus trees was located in row middles before huanglongbing (HLB). Typically, Florida citrus growers manage row middles using physical, chemical and mowing practices, often leaving them free of …
By Ramdas Kanissery Finding the right time to apply post-emergent herbicides for controlling weeds in citrus groves is challenging in the summer months due to frequent rain. Rainy conditions delay grove maintenance, including herbicide spraying, while also impacting the effectiveness of the herbicides. Monitoring weather forecasts and identifying optimal conditions for herbicide applications can help achieve the best results. Below …
By Jawwad Qureshi The Asian citrus psyllid (ACP, Figure 1) continues to feed on citrus trees infected with citrus greening and spread the disease to newly planted young trees. Therefore, it is not possible to produce a healthy citrus tree in an environment where citrus greening is endemic. Only the citrus under protective screen (CUPS, Figure 2) system allows the …
By Amir Rezazadeh Citrus fruit splitting is an important problem for growers, causing frustration and economic losses. This phenomenon occurs when the rinds of citrus fruits crack open, exposing the inner pulp. Understanding the reasons behind citrus fruit splitting is crucial for growers to implement effective preventive measures. IRRIGATION PRACTICES Inconsistent watering regimes, particularly irregular watering followed by heavy irrigation, …
Chilli thrips (Scirtothrips dorsalis) has been documented in Florida since 1991. This pest has a history of impacting ornamentals, some vegetables, grapes and berry crops. Most recently, chilli thrips has affected citrus, but only in nurseries and in citrus under protective screens (CUPS). Feeding damage includes death of young flush (Figure 1), leaf damage on expanded flush that results in …
By Ute Albrecht and Larissa Nunes Citrus growers who injected oxytetracycline (OTC) last year most likely experienced sectoring, which is the appearance of some portions of the canopy looking considerably healthier than the rest of the tree. RECENT RESEARCH In a recent trial in a commercial citrus grove, University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers injected …
