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End-of-season grape disease levels on Pierce’s disease resistant Camminare Noir and selection 07370-84 cultivars

You may find this YouTube video to be of interest. With the amount of Pierce’s disease (PD) we are observing lately, we need to consider alternatives to Vitis vinifera and susceptible hybrid cultivars, especially at lower elevations and latitudes throughout Georgia. In light of our need for production of quality…
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Muscadine Disease Presentation

Mark Hoffman (North Carolina State) conducted a webinar on muscadine disease management yesterday. It included extension personnel and producers. If you are interested in a review of muscadine diseases and their management, please go to the link below. I cover all the major diseases of muscadine in my talk, and…
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Pierce’s Disease Training

We will soon be observing symptoms of Pierce’s disease in susceptible grape varieties — Vitis vinifera and some hybrids such as Chambourcin. Unfortunately, winter temperatures have now been mild for several years, so we are seeing an uptick in Pierce’s disease at higher and higher elevations in Georgia and throughout…
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Downy Mildew Leaf Symptoms and Signs

Disease identification in wine grapes can be confusing, even for the “experts,” so it is good to continually reinforce your knowledge of diseases and their symptoms (spots or discoloration on a leaf for example) and signs (actual pathogen fruiting structures and other tissues you can see with the naked eye…
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Wine Grape Pathology Podcast Episode

If you listen to podcasts, you might be interested in listening to the podcast found in the link below. This is from a new University of Arkansas podcast site that is sponsored by the Southern Region Small Fruit Consortium, the same group that funds much of the training of county…
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Preparation for grape root borer – 2020

We are within a few weeks of the anticipated initial emergence of grape root borer (GRB) adults in North Georgia. If you are planning on implementing mating disruption as a management tactic for GRB and you haven’t deployed your pheromone dispensers/ties, now is the time to get those distributed.  If…
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Downy Mildew Alert

Today, I observed downy mildew for the first time this year. It was on Lenoir vines in west Georgia, and this indicates that producers should be scouting for it throughout the state. In addition, if you have not already done so, I would consider incorporating highly efficacious materials such as…
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Powdery Mildew Alert

Powdery mildew is just starting to show up on untreated plants in the research vineyard at Blairsville, GA. The photograph below was taken today, but infections likely started occurring some time ago. I hope you will not see it yet in well managed vineyards, but recent rains and other difficulties…
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Fungal Resistance Management Videos

Much of the wine grape pathology research we have conducted in Georgia over the last 2-3 years has been associated with resistance management of fungal pathogens such as downy mildew, powdery mildew, Botrytis and others. Alternation or tank-mixing of different fungicide classes is critical for prevention of resistance development. Under…
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