University of Vermont Fruit Blog

Category: Grape

  • Vineyard management

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    By Terence Bradshaw July 8, 2016 Grape disease management remains a concern, but as vine and berry susceptibility to black rot and phomopsis wanes, focus should shift toward powdery and downy mildews and botrytis. Revus Top (fungicide resistance class (FRAC) 3 & 40) is effective against the mildews but not botrytis (which may be less…

  • Canopy management, grape diseases, and phylloxera

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    By Terence Bradshaw By now, you should have thinned shoots down to 4-6 per foot of cordon length, and spaced them evenly through the canopy. Growing shoots are beginning to lignify at the base, which makes combing possible (and timely). Combing the canopy on high-wire training systems by manually separating shoots and pulling them down…

  • Vineyard management June 14

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    By Terence Bradshaw The near-daily rain the past week hasn’t amounted to much accumulation, so any protective fungicides applied during the narrow low-wind window of June 10-11 are likely still present on the surface of leaf tissues. However, plentiful moisture plus the warm, sunny weather on tap the next few days and grapes’ propensity for…

  • Wet weather over the weekend…and continuing

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    By Terence Bradshaw This joint apple/grape notice is in reference to the amount of rain that fell Sunday. Rainfall amounts at all NEWA stations in Vermont were between one and two inches, and closer to the latter. Most pesticides can be considered completely depleted by two inches of precipitation, so we can assume that most…

  • Vineyard disease management, June 3

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    By Terence Bradshaw Vines are growing rapidly in Vermont, we have shoots over 16” in the UVM vineyard, and we will be approaching the ‘immediate prebloom’ period when phomopsis, black rot, powdery mildew, and downy mildew are al active. Rain is expected Sunday June 5-Wednesday June 8, and low winds are expected tomorrow, June 4.…

  • Northern Grapes News You Can Use: Grape Insect, Disease, and Mite Control

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    By Terence Bradshaw http://northerngrapesproject.org/wp-content/uploads/2016/06/June-2016-News-You-Can-Use-Disease-and-Insect-biology-and-management.pdf News You Can Use Grape Disease, Insect, and Mite Control and Biology June 2016 A single grape phylloxera leaf gall (left), with the side of the gall opened to show adult female and many yellowish eggs (photo by J. Ogrodnick) and anthracnose lesions on grape berries (right) (photo by W. Wilcox).…

  • Vineyard management

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    By Terence Bradshaw Apologies if pictures don’t come through in this message, attached photos may be found in the corresponding blog post: http://blog.uvm.edu/fruit/2016/05/28/vineyard-management/ Grapes are moving fast in Vermont vineyards, with most cultivars in the UVM vineyard at about 3” shoot growth. Shoot thinning now will give best results before the vines waste energy on…

  • Northern Grapes News. Vol 5, Issue 2, May 26, 2016

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    By Terence Bradshaw http://northerngrapesproject.org/wp-content/uploads/2016/05/NG-News-Vol5-I2-May-2016.pdf Northern Grapes News. Vol 5, Issue 2, May 26, 2016 In this issue: Interspecific Hybrid Red Wine Color. NGP Team Profile: Amaya Atucha. NGP Team Profile: Francis Ferrandino. Simultaneous Chemical and Sensory Analysis of Frontenac and Marquette Wines. Tasting Room Visitor Surveys: Experience with and Enjoyment of Cold-Hardy Wines.

  • Important industry survey: Food Safety Modernization Act

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    By Terence Bradshaw I don’t wish to burden anyone at this busy time of year with a survey unless it’s important. But this is important. The VT Agency of Agriculture, Food, and Markets (VAAFM) is preparing to roll out implementation and compliance with the federal Food Safety Modernization Act (FSMA) which will affect every farm…

  • Grape bud break

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    By Terence Bradshaw Buds have been breaking in Vermont vineyards in the past week, which signifies the real start of the growing season. This brings up a few pest management considerations for your vineyards. Most cold-climate cultivars will not need disease protection until 5-8” of shoot growth, but any vineyards with heavy disease pressure last…