UGA Extension Viticulture Blog

Reflections on Resistance

Pierce’s Disease (PD) is an ever present threat in the minds of many grape-growers.  This disease, caused by the bacterium Xylella fastidiosa, is spread by many vectors, but most notably, the glassy winged sharpshooter (GWSS).  Though PD was first discovered in Anaheim, California and was spread by the blue-green sharpshooter,…
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Sour Rot Reported — Management Plan

Sour rot is showing up in some Georgia vineyards (see photo below), and this is really no surprise with our environment.  The classic vinegar smell in the vineyard helps to identify sour rot, as other rots are somewhat similar as they initially develop. We have issues with this disease complex…
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Cold spring leaves French grape harvest headed for historic low

Georgia is not the only place where grapes have been impacted by the weather this spring.  The Guardian posted a short article today discussing the low production of French wine expected this year after a spring cold snap caused problems for grape growers, especially in the Bordeaux region of southwest…
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Outlook for August and Aug-Sep-Oct shows likelihood of above normal temperatures

NOAA’s Climate Prediction Center releases monthly climate outlooks in mid-month showing one-month and three-month outlooks for temperature and precipitation.  They are probabilistic forecasts, which means they tell you the likelihood of above, near or below normal conditions but not how extreme they might get. For example, in the one-month temperature…
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Introduction from Pam Knox, UGA agricultural climatologist

Since I am the newest member of the Viticulture Team, I thought I would introduce myself.  I am Pam Knox, UGA agricultural climatologist, currently in the Department of Crop and Soil Sciences in the College of Ag.  I’ve worked at UGA since 2001, first as the Assistant State Climatologist and…
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Bird & Mammal Prevention/Deterrence

Please let me introduce myself.  My name is Mike Mengak and I am a Professor & Wildlife Outreach Specialist in the Warnell School of Forestry & Natural Resources at the University of Georgia.  Our Viticulture Extension Specialist – Dr. Cain Hickey – has invited me to join the “Viticulture Team”. …
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Powdery Mildew Management Questions — Answers from an International Workshop on Powdery Mildew

I recently had questions at a grower meeting about several aspects of powdery mildew management.  I am currently attending an international meeting on powdery mildew, so it is very helpful to have my opinions supported by true experts in the field of powdery mildew management.  Relative powdery mildew, the following…
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Japanese beetle management reminder

With veraison upon us, I just wanted to remind everyone about the continued threat from Japanese beetles. The adult beetles feed on the soft leaf tissue between veins, which often results in a skeletonized appearance. Below are images from Petit Verdot that Cain observed recently in Virginia that have been…
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