By Manjul Dutt, Ethan Nielsen, Lamiaa Mahmoud, Maria Quirico and Jude Grosser All commercially cultivated citrus scion varieties are grafted onto rootstocks before being planted in the field. The rootstocks are selected based on specific desirable qualities (abiotic/biotic stress resistance) and the ability to produce a good crop in a specific location. The ideal rootstock confers disease resistance, hardiness, tolerance …
Scout for Problems, Even in CUPS
Growers should monitor for pests and diseases, even in the citrus under protective screen (CUPS) systems designed to keep HLB-spreading psyllids out of trees, according to entomologist Jawwad Qureshi. He told more than 25 people participating in a Dec. 1 virtual seminar that CUPS “are not foolproof systems,” and said citrus can’t be grown successfully without pest management. Qureshi works …
How to Own Your Data and Profit From It
With the rapid development of artificial intelligence, data derived from farms might be more valuable than the crops growers produce. That’s because farmers can make money from their information when companies use it for other purposes, says a University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) scientist. The key for producers is to take ownership of their information. …
Douglas Plant Health Is Now DPH Biologicals™
Douglas Plant Health announced it has changed its name to DPH Biologicals. The new name recognizes the century-long commitment of its parent company, Douglas Products, to deliver effective and high-quality products to its customers while more clearly focusing on expanding its biologicals product platform to deliver value to customers by sustainably increasing productivity, yield and profitability. In 2018, the assets …
BMPs Addressed in Bill
Florida Sen. Ben Albritton filed a bill (SB 1000) to address issues related to best management practices (BMPs), the Nov. 19 Florida Citrus Mutual Triangle newsletter reported. According to the Triangle, the bill addresses several issues stemming from outdated science supporting University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) nutrient recommendation rates pertaining to BMPs. The bill also …
Texas Freeze Update: Fruit Is Sparse
Surviving citrus trees in South Texas have bounced back from extreme freeze during Winter Storm Uri in February, but fruit is sparse this season, said Texas A&M AgriLife Extension horticulturist Juan Anciso. An AgriLife Extension study estimated the severe freeze caused $230 million in damage to Texas’ citrus industry. Around 80% of the orange crop and almost 70% of …
Grapefruit Import Action Protested
The state agriculture commissioners for Florida and Texas recently urged U.S. Secretary of Agriculture Tom Vilsack to reinstate juice content requirements on grapefruit imports. They stated that a so-called “patch” issued earlier this year by the U.S. Department of Agriculture creates unfair advantages for Mexico and other countries over domestic grapefruit producers. “There appears to have been a ‘patch’ quietly …
Which Rootstock to Select
Valencia trees on high-vigor (left) and low-vigor (right) inducing rootstocks in a Central Ridge field trial. Note the higher yield efficiency of the smaller trees on the right and the leaning of these trees due to Hurricane Irma. By Ute Albrecht Rootstock selection is critical for longevity and productivity of a grove. The decision should be based on compatibility with …
Mandarin: ‘The Perfect Piece of Fruit’
Mandarin citrus is “the perfect piece of fruit,” Suntreat Packing Vice President Scott Owen told a recent Global Citrus Congress audience. “It tastes great. It’s easy to peel. It doesn’t have seeds. It’s a healthy snack, so moms love to give it to kids.” Mandarins are now a $1.8 billion market, compared to $1.2 billion for oranges, Owen said. He …
ACP Management With UV-Reflective Mulch and Flush-Timed Sprays
By Jawwad Qureshi, Lauren Diepenbrock and Davie Kadyampakeni The future of the Florida citrus industry depends on successfully replacing the present bearing tree inventory with new plantings and transitioning them into crop production. This would be a relatively routine process were it not for the ubiquitous presence of huanglongbing (HLB) and its vector, Asian citrus psyllid (ACP). Early infection can …
HLB Research Grants Go to UF/IFAS
The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) was recently awarded more than $2.2 million in federal grants for HLB research. The funding came from the U.S. Department of Agriculture’s (USDA) National Institute of Food and Agriculture (NIFA) Emergency Citrus Disease Research and Extension Program. UF/IFAS researchers are also serving in leadership roles in two other NIFA-funded …
PIECES OF THE PAST: A Thanksgiving Mantra
By Brenda Eubanks Burnette Several years ago, I was at the 2017 Florida Ag Hall of Fame dinner for my friend, Bernie Lester, who was being inducted that year. He recounted such a wonderful story during his speech that I asked him to send it to me so I would have it for the Citrus Archives, and I’d like to …
Speeding Up Xf Bacteria Detection
Xylella fastidiosa (Xf) bacterium causes incurable diseases that make plants wither and possibly die, scorching and browning leaves and reducing the size of fruit in a wide variety of important crops. Citrus variegated chlorosis is among the diseases that Xf causes. Pablo J. Zarco-Tejada and Tomas Poblete with the University of Melbourne describe the Xf bacterium as “the number one …
Update on Florida’s Orange Brix Issue
Florida Citrus Mutual (FCM) provided additional information about the issue of low Brix oranges in its Nov. 19 Triangle newsletter. It reported that Florida growers and processors “are bracing for another season of low Brix oranges.” Earlier this year, FCM sought enforcement discretion regarding Brix in pasteurized orange juice, not from concentrate (NFC), from the Federal Drug Administration (FDA) with the …
Combining Multiple Methods to Manage HLB
At the recent Citrus Research and Education Center (CREC) field day and open house, Arnold Schumann showed visitors a Jackson grapefruit trial aimed at protecting trees from HLB. Schumann is a professor at the University of Florida Institute of Food and Agricultural Sciences CREC in Lake Alfred. The trial combines the use of individual protective covers (also known as IPCs …
New HLB Find Is Likely Farthest North in Florida
What is believed to be the most northern HLB find in Florida was made the first week of November in a backyard Satsuma tree in Tallahassee. A homeowner sent photos of the tree’s symptoms to Leon County Extension horticulture agent Mark Tancig, who collected samples that were confirmed as HLB. “I’ve told the homeowner he should remove it (the tree), …
Keeping Food Contact Surfaces Safe
By Matt Krug, Michelle Danyluk and Taylor O’Bannon Basic cleaning and sanitizing steps implemented on food contact surfaces are fundamental for reducing the risk of cross-contamination of foodborne pathogens during citrus harvest and post-harvest. While these steps may seem straightforward, several variables can influence effective implementation. A regular review of practices can ensure your operation is set up for success. …
HLB Research Funded for $11 Million
The U.S. Department of Agriculture’s (USDA) National Institute of Food and Agriculture (NIFA) announced an investment of nearly $11 million for research to combat HLB. “NIFA’s Emergency Citrus Disease Research and Extension program brings the nation’s top scientists together with citrus industry representatives to find scientifically sound solutions to combat and prevent HLB at the farm-level,” said NIFA Director Carrie …
Cold Protection: The Tried and the New
Tried and proven cold protection techniques and changes to the Florida Automated Weather Network (FAWN) were discussed in a virtual Nov. 17 winter weather program. Chris Oswalt, citrus Extension agent for Hillsborough and Polk counties, summarized the decades-old cold protection techniques still practiced by Florida citrus growers. One of the first steps in cold protection is being prepared by staying …
Early Performance of Orange Rootstocks in Commercial Settings
By Ariel Singerman, Stephen H. Futch and Brandon Page This article provides estimates on the performance of different rootstocks grafted with Valencia sweet orange scions in commercial field conditions. These are the first estimates obtained from side-by-side trials that compare the performance of rootstocks developed by two breeding programs: The University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) …