University of Vermont Fruit Blog

Category: Grape

  • New England Vegetable and Fruit Conference Dec 15-17

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    The program for the New England Vegetable and Fruit Conference is available online at: http://www.newenglandvfc.org/. Online registration is not yet active, I’ll send a notice when it is, but growers interested in attending should book a room as soon as possible if planning to spend the night since the main hotel and surrounding ones do…

  • October Northern Grapes News You Can Use – Yeast Trials

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    http://northerngrapesproject.org/wp-content/uploads/2015/10/October-2015-News-You-Can-Use-Yeast-Trials.pdf News You Can Use Northern Grapes Project Yeast Trials October 2015 White wine yeast trials in process at the Vinification and Brewing Technology Laboratory at Cornell University. Photo: Anna Katharine Mansfield, Cornell University When considering choice of yeast, there are many options that winemakers can choose from. One must consider not only the variety…

  • September Northern Grapes Project News You Can Use – Yeast Assimilable Nitrogen

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    http://northerngrapesproject.org/wp-content/uploads/2015/09/September-2015-News-You-Can-Use-Yan.pdf News You Can Use YAN – Yeast Assimilable Nitrogen     September 2015 Mark Nesbitt, former graduate student at Cornell University, sets up the ChemWell analyzer to measure YAN in grape juice samples. Photo: Tim Martinson, Cornell University In addition to sugars, adequate yeast assimilable nitrogen (YAN) concentration is required for successful alcoholic fermentation…

  • Grape maturity and late-season petiole sampling

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    by Terence Bradshaw Grape maturity We have begun weekly preharvest sampling of the winegrapes at the UVM Horticulture Research and Education Center. Right now, grapes are about a week ahead of last year’s ripeness schedule, and with warm/hot, dry weather this week, ripening should advance quickly. I still don’t expect harvest to begin for another…

  • August 2015 issue of Northern Grapes News

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      August issue of Northern Grapes News.  Here’s the direct link: http://northerngrapesproject.org/wp-content/uploads/2015/08/NG-News-Vol4-I3-Aug-2015.pdf   In this Issue: -Does Production Region Matter? -NGP Team Profile: Mike White. -NGP Team Profile: Paul Read. -I Have Galls in my Vineyard: Should I Call my Nursery? -Cold Climate Wine Quality Assurance Program.    Northern Grapes Project Homepage: http://northerngrapesproject.org/ Northern Grapes…

  • Northern Grapes Project July News You Can Use: Grapevine Nutrition

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    http://northerngrapesproject.org/wp-content/uploads/2015/07/July-2015-News-You-Can-Use-Vine-Nutrition.pdf News You Can Use Grapevine Nutrition July 2015 Iron chlorosis due to high soil pH. Photo: Harlene Hatterman-Valenti, North Dakota State University Growers of cold-hardy grape cultivars are currently relying on mineral nutrition and soil management practices developed for Vitis vinifera or V. labrusca. Therefore, Carl Rosen and James Crants at the University of…

  • Vineyard spraying and wet weather

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    by Terence Bradshaw After one of the driest Mays on record, we are closing out June as one of the wettest in many areas, and that means the potential for diseases in Vermont vineyards. Recent weather has been excellent for development of our major diseases: phomopsis, black rot, powdery mildew, downy mildew, and anthracnose. I…

  • Managing frost-damaged vines

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    by Terence Bradshaw Tim Martinson at Cornell Cooperative Extension recently wrote a thorough blog post about managing frost-damaged vines that may be found at: http://blogs.cornell.edu/nnygrapeupdate/2015/06/17/after-the-freeze-the-second-crop/

  • June 2015 Northern Grapes Project News You Can Use: Herbicide Drift

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    http://northerngrapesproject.org/wp-content/uploads/2015/06/June-2015-News-You-Can-Use-Herbicide-Drift.pdf News You Can Use   Herbicide Drift June 2015 2,4-D damage on Baco Noir in western New York. Fan-shaped leaves are almost always seen with 2,4-D injury. Photo: Tim Weigel, Cornell University Damage from herbicide drift is, unfortunately, something that a number of grape growers are all too familiar with. The effects of off-target…

  • Prebloom disease management and frost prevention (?)

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    May 28, 2015 by Terence Bradshaw Grapes in the Champlain Valley will soon be approaching the ‘immediate prebloom’ stage which is a critical time for management of multiple disease, including black rot, downy mildew, powdery mildew, phomopsis, and anthracnose. Spray applications may be made any time now to help prevent these diseases. Remember, you cannot…