I observed significant Pierce’s disease and downy mildew yesterday, and both diseases are starting to show up in multiple northern Georgia locations now. As I was looking at plants, I realized that one can confuse early downy mildew and Pierce’s disease if one is not careful. If plants have confirmed…
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UGA Extension Viticulture Blog
We collected our first grape root borer adults today in one of our pheromone traps in White County, Georgia. This means that the adults have started to emerge from the soil out of their pupal stage. For the next few weeks the adults will emerge, mate, and the females will…
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Thrips are small yellowish-brown insects, approximately 0.04 inch long, with feathery wings. Thrips are generally not a problem for wine grapes, but both western flower thrips and grape thrips are known to cause damage on grapes. Western flower thrips are…
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I have heard many great reviews of the 2019 Georgia Wine Producers Conference. At long last, here are copies of all presentations given by our speakers at this year’s conference in February – for review for those in attendance, and for your information for those who weren’t. Thanks to the…
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It’s really not news that the use of glyphosate has been a controversial issue as of late. Regardless of position on this issue, it is a fact that many use this chemical in our grape industry as well as in other agricultural industries. Wayne Mitchem, our UGA Extension vineyard and…
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I just wanted to alert everyone that spotted wing drosophila (SWD) management timing is once again upon us. The SWD flies are active nearly year round in these parts, but as the brix levels in wine grapes reach approximately 15 degrees Brix, the grapes become attractive (and thus susceptible) to…
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As vines enter veraison, there is a shift in resource (nutrients, carbon) allocation from the canopy toward the ripening fruit. The result is can be a manifestation of nutritional and systemic disease (viral, bacterial) symptoms in canopies of deficient and/or infected vines. Please be on the look out for symptomatic…
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Good evening everyone, I have another post that may seem scary, but there is no need for panic…yet. As many of you have probably already heard, the spotted lanternfly (SLF) is the latest non-native species to invade the U.S. This insect is not a fly, but is actually a large,…
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Hello everyone, I don’t want to cause any unwarranted panic, but there has been a report of a substantial mite infestation in a vineyard block in North Georgia. Nothing a little miticide can’t handle, but I wanted to remind everyone was aware that mites can be a problem, especially as…
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All: A kind reminder to please help us out by taking this sour rot survey. Your responses can help us make a case that research is highly needed to further investigate optimal management methods for this devastating disease. Here is the text from the previous post: As we enter veraison…
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As we enter veraison this vintage, it is timely to ask y’all to please consider helping us by answering this short survey on grape sour rot. Sour rot has been devastating in many cases over the last two ripening periods. We still have LOTS to learn about refining sour rot…
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From Brooke Warres, graduate student in Plant Pathology at the University of Georgia. Powdery mildew, caused by the fungus Erysiphe necator, has been found at the UGA Mountain Research Station in Blairsville, GA. The disease was observed on an untreated vine in a fungicide trial. Make sure that your current…
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Hello everyone, I wanted to update you all about what we are seeing in terms of sharpshooters in the vineyards. Right now, one of the most common sharpshooters we are seeing is the “broad-headed sharpshooter” (see image below). It Is similar in size to glassy-winged sharpshooter and at a glance…
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