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Below you'll see everything we could locate for your search of “rootstock”
Researcher Rhuanito “Johnny” Ferrarezi recently discussed experiments on citrus varieties and citrus under protective screen (CUPS) in the Indian River area. Ferrarezi is a University of Florida Institute of Food and Agricultural Sciences assistant professor of citrus horticulture at the Indian River Research and Education Center (IRREC). One large trial Ferrarezi discussed will be of grapefruit, navel and mandarins on …
By Lorenzo Rossi, Ute Albrecht and Evan Johnson Citrus root systems are confronted with many challenges that limit resource availability needed for tree productivity. Challenges are compounded by huanglongbing (HLB), which now affects nearly all citrus trees throughout Florida’s production areas. Contrary to the above-ground portion of the tree, study of the below-ground portion is considerably more difficult. This article …
Citrus Research and Development Foundation (CRDF) President Larry Black discusses the organization’s potential role in large-scale field trials to demonstrate how citrus can be grown in the face of HLB. He also talks about a communication study showing how growers like to receive information about CRDF. The Citrus Research and Field Trial (CRAFT) program would be funded for approximately $8 …
By Larry Duncan Successive hard freezes in Florida in the late 1980s resulted in widespread replanting of citrus groves. Within a few years, many groves on the Central Ridge had discrete patches of poorly growing, chlorotic young trees amid patches of vigorously growing trees. Stubby root symptoms on the declining trees suggested damage by sting nematodes (Belonolaimus longicaudatus). This nematode …
By using drone technology, Florida citrus growers can find out how many trees live in their groves and, eventually, they may detect the health status of the trees, a new University of Florida study shows. Imaging from unmanned aerial vehicles (UAVs) can accurately detect and count citrus trees and spaces where trees have had to be removed in groves, said …
By Evan Johnson Diseases caused by phytophthora continually threaten Florida citrus production. Brown rot can directly reduce yields of early maturing varieties including Hamlin and grapefruit, can delay harvest of fresh market fruit until infected fruit have dropped, or risk packinghouse rejection of the load because it can spread post-harvest. Foot and crown rot can kill trees but are uncommon …
A horticultural research scientist with experience in the development of disease-free citrus rootstock and disease-tolerant citrus varieties in Iran’s northern agricultural region will now serve the Indian River District’s growers. Amir Rezazadeh recently began his new position as multicounty fruit and field crops agent for the University of Florida’s Institute of Food and Agricultural Sciences (UF/IFAS) Extension in Saint Lucie …
Michael Rogers recently said there is increased optimism in the Florida citrus industry. “With that optimism, growers are starting to give more consideration to replanting,” said Rogers, director of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center in Lake Alfred. According to Rogers, some growers who held off on planting in the …
Editor’s Note (Feb. 20, 2019): The name of the program has been changed from the Grower Replanting Initiative Program to the Citrus Research and Field Trial Program. According to Florida Citrus Mutual CEO Mike Sparks, the U.S. Department of Agriculture (USDA) has given “concept approval” for massive Florida grower field trials to determine what existing research might work in the …
Florida grapefruit trees have taken a much harder hit from HLB, also known as greening disease, in recent years than orange trees have. Grapefruit production has plummeted drastically, and growers are desperately seeking ways to keep trees alive and productive. The fruit’s troubles have hit especially hard in the Indian River area, known worldwide for its grapefruit. Indian River Citrus …
By Lauren Diepenbrock While Asian citrus psyllids (ACP) are an ongoing concern in Florida citrus due to their role in spreading the bacterium associated with citrus greening, they are not the only pest of concern to growers. Citrus leafminer (CLM) and root weevils are two pests that have been raising concerns and adding to the challenge of managing productive citrus …
By Jawwad Qureshi, Lukasz Stelinski and Fernando Alferez Management of huanglongbing (HLB) has focused on reducing the vector Asian citrus psyllid (ACP) and improving tree health, thus requiring a multi-pronged approach. Several elements of an HLB management system are either available or under current investigation. Maintenance of clean nursery stock, vector management and tree nutrition are widely implemented, while incorporation …
Citrus tristeza virus (CTV) began spreading in Sicily in the early 2000s because the Italian citrus industry’s standard rootstock was CTV-susceptible sour orange, reported Marco Caruso at a recent symposium of international citrus breeders. Consequently, approximately 74,000 acres will be replanted with CTV-tolerant rootstocks over the next few years, he said. Caruso, a citrus breeding expert with Italy’s Research Centre …
By Megan Dewdney, Evan Johnson, Naweena Thapa and Michelle Danyluk In 2015, we started a large-scale project to determine if thermotherapy would be an effective huanglongbing (HLB) treatment for field trees. Some of the objectives were to determine effective temperature-time combinations for thermotherapy, which season gave optimal results for thermotherapy, and the effect on yield in subsequent years. TRIAL DETAILSComprehensive …
New research data are coming from trials of citrus rootstocks, scions and combinations of the two that University of Florida scientists hope will broaden the options of greening-tolerant citrus varieties available to commercial growers. Michael Rogers, director of the Citrus Research and Education Center (CREC), part of the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS), said scientists …
By Ernie Neff Jerry Mixon’s use of netting to keep birds from blueberries helped pique his interest in growing citrus under protective screen (CUPS) to exclude HLB-spreading psyllids. But he credits University of Florida researcher Arnold Schumann with helping him bring his Polk County CUPS project to fruition. Mixon met Schumann in 2015, the year after Schumann’s 1-acre CUPS was …
On Dec. 4 at the Citrus Research and Education Center (CREC), citrus growers can see if they want to grow the latest varieties from University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) breeders and then learn more about commercializing crops. In the morning, industry members can sample the latest citrus varieties from UF/IFAS breeders. “These are new varieties …
By Arnold Schumann, Timothy Ebert, Laura Waldo, Danny Holmes, Napoleon Mariner, Gary Test, Chris Oswalt, Rhuanito Ferrarezi and Ricardo Lesmes Two studies with citrus under protective screen (CUPS) were established at the University of Florida Institute of Food and Agricultural Sciences (UF/IFAS) Citrus Research and Education Center (CREC) and Indian River Research and Education Center (IRREC) in 2013–14. The goal …
Chris Oswalt, University of Florida Institute of Food and Agricultural Sciences citrus Extension agent for Polk and Hillsborough counties, discusses passive and active cold-protection practices for citrus trees. “Passive practices are those things that growers would intentionally do before typically planting the grove,” Oswalt says. Site selection, including planting on higher elevations that are warmer than lower cold-pocket locations, is …
By Rhuanito Ferrarezi, Alan Wright and Arnold Schumann High-density plantings have been tested worldwide in advanced citrus production systems (ACPS) to increase efficiency of water, fertilizer and light, and to maximize yield per area. After the onset of huanglongbing (HLB) in Florida, canopy growth reduced drastically due to negative impacts on plant health, creating the need for new plant spacing …
