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About Jonathan Oliver

Dr. Jonathan Oliver is an Assistant Professor and Extension Specialist in the Department of Plant Pathology at the University of Georgia. He has a 75% research and 25% extension appointment. Dr. Oliver started in his current position at the University of Georgia in mid-2017 as an extension fruit pathologist at the Coastal Plains Experiment Station in Tifton, Georgia. His responsibilities include research and extension activities focused on pathogen biology and disease management in fruit crops grown primarily in the southern part of Georgia, including blueberries, blackberries, citrus, and other emerging fruit crops. Dr. Oliver obtained a BS degree in Plant Pathology and Microbiology & Cell Science from the University of Florida in 2005, and a PhD in Plant Microbe Biology from Cornell University, New York State Agricultural Experiment Station in Geneva, NY in 2011. In addition, he has also been postdoctoral researcher at Kansas State University and Auburn University. At Auburn, he characterized the interactions between the emerging bacterial pathogen, Xylella fastidiosa, and its blueberry plant hosts. He currently serves as a Plant Pathology Section editor for the Southeast Regional Blueberry Integrated Management Guide.

Citrus Greening AND Citrus Canker Testing for Commercial and Residential Citrus in Fall 2021

As part of our 2021 disease survey efforts, we will begin accepting samples from within Georgia for free citrus greening and citrus canker testing on September 1st. Sample testing will be carried out by the UGA Plant Molecular Diagnostic Laboratory in Tifton, GA. Here’s the original announcement regarding this testing program: My…
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Citrus Tissue Analysis

July and August are the best months to collect leaf samples for tissue analysis while nutrient concentrations are the most stable.  Each sample should not represent more than 20 acres and can be taken from 15-20 trees.  Select only one leaf from each shoot that is between 4-6 months of…
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‘Owari’ Satsuma Rootstock Trial Summary 2019 & 2020

By: Jake Price (UGA Extension, Lowndes County, GA – ) and Dr. Kim Bowman (Rootstock geneticist, Ft. Pierce, FL – ) Purpose: Identify the best commercially-available rootstocks for ‘Owari’ satsumas, based upon effects on fruit yield, fruit quality, cold-hardiness, tree health, fruit size, and tree size. Background: In 2014, Lowndes Extension began…
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Citrus Greening AND Citrus Canker Testing for Commercial and Residential Citrus in 2021

As part of our 2021 disease survey efforts, we will begin accepting samples from within Georgia for free citrus greening and citrus canker testing on March 1st. Sample testing will be carried out by the UGA Plant Molecular Diagnostic Laboratory in Tifton, GA. Here’s the original announcement regarding this testing program: My…
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Hop stunt viroid Infecting Citrus Trees in Georgia, USA

By: Emran Ali, Tammy Stackhouse, Sumyya Waliullah, Jean Williams-Woodward, and Jonathan E. Oliver Is one of the world’s smallest pathogens harming your citrus plants? Citrus production within the state of Georgia (USA) is rapidly increasing each year. There are citrus plantings in backyards, production, and plant nurseries within at least…
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‘Owari’ Satsuma Rootstock Trial Summary 2018 & 2019

By: Jake Price (UGA Extension, Lowndes County, GA – ) and Dr. Kim Bowman (Rootstock geneticist, Ft. Pierce, FL – ) Purpose: Identify the best commercially-available rootstocks for ‘Owari’ satsumas, based upon effects on fruit yield, fruit quality, cold-hardiness, tree health, fruit size, and tree size. Background: In 2014, Lowndes…
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