The historic cold snap that has frozen Texas this week has left citrus growers with little hope for saving their crops. “We’ve had the perfect trifecta this season,” says Dale Murden, citrus grower and president of Texas Citrus Mutual. “We’ve endured the lingering drought, Hurricane Hanna and now the St. Valentine’s Day Massacre — all on top of the pandemic. …
Georgia Citrus Conference to Be Online
Due to COVID-19, the 2021 Georgia Citrus Association (GCA) Conference will not be held in person. Instead, the GCA is launching a new website and membership platform. This state-of-the-art tool will allow members to view presentations by experts at any time. Topics include weed management, citrus diseases and disorders, testing for diseases, precision agriculture, crop insurance, cold protection and the …
Thrips Management Tips
As Florida growers prepare for the spring bloom, it is time to think about a pest that thrives on citrus flowers: thrips. Most notably, flower thrips are known to cause damage to developing flowers in sweet orange. Feeding damage can range from negligible to causing abortion of the flower or developing fruitlet. This pest is particularly challenging because it migrates …
Coordinated Treatment Planned for California Citrus
Citrus growers and industry members recently gathered virtually to discuss the Asian citrus psyllid (ACP) and huanglongbing disease (HLB) situation throughout the Central Valley of California. The reason for the concern is a negative trend seen in 2020. ACP DETECTION HISTORYACPs, the vectors for the disease, are widespread in Southern California where HLB-infected trees have been found. There are ongoing …
Georgia Owari Rootstock Trial Update
Ongoing citrus rootstock trials being conducted by the University of Georgia (UGA) hold promise for Georgia’s growing citrus industry. Jake Price, UGA Extension agent and Lowndes County Extension coordinator, has produced six local citrus rootstock/variety trials with varying objectives. The oldest trial, planted in 2014, is growing Owari satsuma trees on standard and new trifoliate hybrid rootstocks. Each year, as …
Nutrition Management Program Yields Results
University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers have found that following nutrition and irrigation guidelines designed for a specific grove will help growers promote tree health and produce high-quality citrus. Last year, UF/IFAS scientists offered Florida growers a unique nutritional counseling program, commonly referred to as the nutrition box program. It provides free soil and leaf …
Florida Citrus Forecast for February Sees Some Changes
The February Florida orange forecast released by the U.S. Department of Agriculture (USDA) is 56 million boxes, up 2 million boxes from the January forecast. This represents a 4 percent increase from the January forecast. If realized, it will be 17 percent less than last season’s final production. ORANGESThe forecast change was for non-Valencia production, which now stands at 22 …
UF/IFAS VP Scott Angle on HLB Efforts
Florida’s citrus growers are counting on research to help sustain what’s left of an industry decimated by huanglongbing (HLB). The disease remains a focal point of research at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS). Scott Angle, vice president for agriculture and natural resources at UF/IFAS, understands the ramifications if improved HLB management options aren’t available …
Scout Early Bloom for PFD
By Andre B. Gama and Megan M. Dewdney Postbloom fruit drop (PFD) of citrus is a disease caused mostly by the fungus Colletotrichum acutatum. This fungus survives by producing resting structures on leaves and stems. When flowers start to appear in groves, these resting structures produce spores that can cause PFD. However, the fungus requires specific weather conditions to be …
Cold Hardy Citrus Association Building a Solid Foundation
The Cold Hardy Citrus Association (CHCA), founded in 2017, was established to ensure all growers, large and small, have a unified voice in an emerging industry and to provide education on best management practices in light of HLB. CHCA members include growers, packers, processors, industry suppliers, nurseries, consultants, homeowners and academia representing Florida, Georgia, Alabama, Louisiana and Mississippi. Kim Jones …
Foliar Disease Management in 2021
By Megan Dewdney There were many challenges in 2020, but fortunately the Florida season for foliar citrus diseases was relatively normal. Little to no postbloom fruit drop (PFD) was reported during the 2020 bloom because of a sudden dry spell as the flowers opened. As spring 2021 approaches, the forecast is for a La Niña weather pattern with slightly warmer …
Field-Testing Natural Compounds to Fight HLB
Field tests of numerous antibacterial products and plant-derived compounds are underway with the goal of eliminating the HLB-causing bacteria in citrus and reversing plant damage to restore tree health. University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) plant root biologist Lorenzo Rossi discusses a new research project funded by the U.S. Department of Agriculture’s (USDA) National Institute of …
Speeding Up Citrus Growth
Two University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) researchers will study citrus roots and stems to improve photosynthesis in plant leaves. Christopher Vincent and Fred Gmitter hope to find the optimal relationship between citrus tree “sources” and “sinks” so that plant breeders can select varieties — and growers can use practices — that lead to faster-growing plants. …
Miss Florida Citrus Has a New Squeeze!
By Brenda Eubanks Burnette In January, the Florida Department of Agriculture and Consumer Services (FDACS) hosted virtual “Florida Citrus Squeeze” events at elementary schools throughout Florida with Chef Paula Kendrick and Miss Florida Citrus Leila Sabet. The program was announced in December to Florida food service personnel and teachers that participate in the division’s Harvest of the Month Program. Participating …
ACP Monitoring Efforts in Georgia
The citrus industry is expanding in Georgia. With that growth comes the need to slow the spread of the Asian citrus psyllid (ACP), the vector of HLB disease. Although not yet found in Georgia’s commercial citrus production, there have been confirmed HLB-positive residential citrus trees. The disease has the potential to greatly hinder the state’s citrus industry. Therefore, University of …
Seminar to Address Fruit Drop Questions
Citrus fruit drop before harvest has been a perennial problem for Florida growers but has been particularly challenging this season. Tripti Vashisth and Fernando Alferez of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) will present their latest research on fruit drop and answer questions from growers in a Zoom seminar on Feb. 16. The seminar is …
Cold Acclimation and Leaf Freezing Temperatures
Citrus Extension agent Chris Oswalt reports the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) is determining the acclimation of Florida citrus trees to cold weather by measuring citrus leaf freezing temperatures. “Certain environmental conditions will initiate this acclimation process,” says Oswalt. “These environmental cues will cause physiological changes to occur within the plant that will depress the …
Time to Cut the Dead Wood
By Megan Dewdney, Tripti Vashisth and Lauren Diepenbrock Dead wood has long been challenging for fresh citrus fruit production. Spores in twigs can form which cause blemishing diseases that downgrade fruit for lower profits. More recently, it has come to light that there are horticultural and entomological reasons to remove this wood as well. Many growers are familiar with melanose, …
Making Sense of Biologicals: Interest Increasing in Biologicals
By Clint Thompson Increased interest in biologicals stems from their long-term sustainability and the belief that synthetic materials have reached their ceiling of productivity. Tate McPherson, vice president of marketing and business development at Douglas Plant Health (DPH), shares those sentiments about biologicals, which represent a group of products derived from living organisms. Farmers utilize these environmentally friendly products in …
The Goals of Pest Management
By Ajia Paolillo Editor’s note: This article grants one continuing education unit (CEU) in the Core category toward the renewal of a Florida Department of Agriculture and Consumer Services restricted-use pesticide license when the accompanying test is submitted and approved. Integrated pest management (IPM) uses a combination of methods to keep pest populations at an acceptable level, which are economical …