UGA Extension Viticulture Blog

Monitoring maturity / deciding when to pick.

MONITORING MATURITY: Monitoring grape maturity is important in order to determine when to pick. I am not going to go into the rather subjective details of what defines maturity for making quality wine. Most industry practitioners use a combination of chemical and sensory evaluations to determine when to pick (……
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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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