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Issue 47, November 2021

Issue 47, November 30, 2021

News from Cornell's Viticulture and Enology Program, November 30, 2021

Researchers work in a lab.RESEARCH FOCUS

Vineyard Trial Demonstrates Effectiveness of Roguing and Replanting
to Curtail the Spread of Grapevine Leafroll Disease

In a commercial vineyard, virologist Marc Fuchs and entomologist Greg Loeb showed that annual 'roguing and replanting' reduced leafroll incidence from 4% to 0.6% over 5 years, while infections increased from 5 to 15% in untreated control plots.


Five Questions for Erin Galarneau

We welcome Dr. Erin Galarneau as the new curator of the USDA Plant Genetics Research Unit's cold-hardy grape germplasm collection, with 1,416 grape accessions from 27 Vitis species and cultivated varieties, located at Cornell AgriTech in Geneva, NY.

A large purple cluster of grapes (L) labeled HIgh Cordon, and a smaller, less ripe cluster of grapes labeled VSP.GRAPES 101

Optimizing Nitrogen Use in Vineyards (pdf)

This 2006 article details environmental impacts of nitrogen fertilization, and management guidelines for minimizing N losses from leaching and volatilization.  It's still a timely topic, as some excess N is converted to nitrous oxide (N20), a potent greenhouse gas. Minimizing N losses also reduces greenhouse gas emissions.

Student Allyson WentworthSTUDENT FOCUS

Five Questions for Three Viticulture and Enology Graduate Students

Here we profile three graduate students enrolled in the College of Agriculture and Life Science's Masters of Professional Studies program, described as a course-based degree "ideal for the career-focused student", under the direction of faculty advisors.



  • NEWA Completes Transition to Version 3.0
    After many months of hard work and testing, the newly re-vamped NEWA 3.0 is available for use. Developers have training resources and supports to ease the transition to this new and improved system.
  • Determining Flower Sex in Grapevines Using Genetics
    In the October issue of  Wine Business Monthly article, VitisGen2 team members Tim Martinson, Cheng Zou, Qi Sun, Jason Londo, Mélanie Massonnet and Dario Cantu describe why determining flower sex is important for grape breeders, and how new genetic techniques are helping to uncover the secrets behind the complicated world of seedling sex determination.
  • Chris Gerling, Anna Katharine Mansfield  receive "Outstanding Achievement in Extension-Outreach - Team" award
    Cornell AgriTech Food Science Sr. Extension Associate Chris Gerling, Associate professor Anna Katharine Mansfield and the COVID-19 Food Safety Response Team received the award for Outstanding Achievement in Extension-Outreach from CALS for their programs educating wineries about adapting tasting room procedures to address COVID-19 restrictions.
  • Rainy August Impacts Finger Lakes Harvest
    Wine Business Monthly reporter Linda Jones McKee discusses wins, and losses, of New York’s rainy grape harvest.
  • Natural Enemy of Invasive Pest Spotted Wing Drosophila found in Washington State
    Fruit Grower News reports a newly identified parasitic wasp that provides biological control for spotted wing drosophila, a recently introduced invasive pest of grapes, blueberries, and cherries.
  • Vineyard Trash to Nutritional Treasure
    Cornell Food Science associate professor Elad Tako talks about research into using grape pomace for nutritional supplementation in this article from the Cornell Chronicle.


UV Light vs. Powdery Mildew
Cornell AgriTech's David Gadoury describes how night-time exposure to UV light controls powdery mildew, and demonstrates the robotic equipment they use to apply it.