Bunch Grapes
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The UGA Extension Viticulture Team will be holding a vineyard tour and research / practice discussion in collaboration with several vineyards and wineries. The vineyard tour will take place on August 8th, 2018 and is sponsored by White County Farmer’s Exchange. We thank White County Farmer’s Exchange for their continued support of UGA Extension and…
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We have been receiving multiple grape samples with black rot in our diagnostic clinic. Only one or two infected grapes can provide a vast number of spores for secondary infections of clusters going forward. Prevalent rainfall has made control difficult. The disease cycle will slow as grapes mature, but fruit can still be infected till…
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The Schnabel lab at Clemson University is still offering free testing to help identify resistance problems in the gray mold pathogen Botrytis cinerea from small fruits. The test covers the most important FRAC codes for gray mold control. As grapes approach veraison, Botrytis may start to become a problem as clusters tighten and/or in low ventilated areas…
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We are within a few weeks of the anticipated initial emergence of grape root borer (GRB) adults here in 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 you are unfamiliar with grape…
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The time is upon us once again. Japanese beetles have been documented in vineyards in western GA. They are only just beginning to emerge, so their numbers will increase dramatically over the next few weeks. In large enough numbers, Japanese beetles can be a severe pest of grapes during the summer, feeding mainly on foliage…
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This is a reminder that the annual Southern Winegrape Symposium will be held on Saturday, June 9th at the Carroll County Ag Center in Carrollton, Georgia. Please se previous post by Paula Burke, Carroll County Extension Coordinator and ANR Agent, for more details: https://viticulture.uga.edu/2018/05/2018-southern-winegrape-symposium-in-west-georgia/
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I think most producers are fully aware that recent rainfall events will increase disease levels in wine grapes. I am particularly concerned about fruit rots and downy mildew. In particular, more active materials for downy mildew are needed at this time. Though the contact materials such as Captan and Mancozeb are good materials, I think…
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… please contact Cheng-Fang Hong, Dr. Phil Brannen’s graduate student. Here is the note that Cheng-Fang sent me the other day: “I am looking for phylloxera galls on Blanc du Bois leaves. Specifically, I will need mature Blanc du Bois leaves with some well formed phylloxera galls. The galls and leaves should remain viable and…
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I think only Grateful Dead fans will understand the unworthy attempt at being funny in the title… sorry. But it has been a long, strange pre-bloom / bloom period in Georgia vineyards, and perhaps throughout other grape growing regions in the southeastern US. Most bunch grape vineyards in Georgia are well into bloom or early…
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We are now hitting peak bloom on many of our grape cultivars. Bloom is a critical time for disease management in grapes, and with the rainfall that has occurred this week, we are setting ourselves up for another active downy mildew and rot season. In addition, other diseases, such as powdery mildew, Phomopsis and Botrytis,…
Posted in: Bunch Grapes