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Seasonal Bud Low Temperature Exotherms 2012-2013

Season lowest lethal temperature values for each region during winter of 2012-2013 are listed in separate tables below. Clicking on a variety name will bring up individual graphs of minimum/maximum temperatures and seasonal change in bud lethal temperatures.
Seasonal Bud Mortality for each variety/site can also be found on the graphs.

NYS Agricultural Experiment Station (Weekly samples)

Date Location Variety LT10 LT50 LT90
4/15/2013 Geneva Cabernet Franc 12.5 8.1 -5.8
    Noiret 14.5 11.2 8.8
    Concord 14.1 11.1 7.4
    Riesling 9.2 6.7 2.5

Finger Lakes - Commercial Vineyards

Date Location Variety LT10 LT50 LT90
4/15/13 East Keuka Cabernet Franc 19.3 14.9 10.8
    Cayuga White - - -
    Concord - - -
    Riesling 17.1 14.3 10.8
4/15/13 East Seneca Cabernet Franc -1.0 -4.9 -8.4
    Cayuga White 12.8 3.1 -6.3
    Concord 17.2 11.6 1.9
    Riesling 12.7 9.0 4.9
4/15/13 West Keuka Cabernet Franc 18.4 13.6 9.5
    Cayuga White - - -
    Concord 22.1 16.9 13.4
    Riesling 10.4 4.4 0.7
4/15/13 West Seneca Cabernet Franc 21.8 17.8 7.5
    Cayuga White 17.3 8.1 3.2
    Concord 19.6 14.1 0.3
    Riesling 16.5 12.7 7.1
4/15/13 West Riesling 12.3 6.7 3.1
  Canandaigua Concord 21.7 13.9 11.0
4/15/13 West Cayuga Cab Franc 13.3 9.5 -6.9
    Catawba 18.5 13.3 10.4
    Cayuga White 11.5 6.8 -1.4
    Riesling 8.8 6.4 -3.7

Lake Erie Region  (West To East)

Date Location Variety LT10 LT50 LT90
4/17/13 Portland Cab Franc 18.9 14.4 10.5
4/17/13   Riesling 14.1 12.0 10.2
4/17/13   Niagara 20.6 15.6 5.7
4/17/13   Concord 20.7 16.4 -3.5
4/17/13   Traminette 16.6 11.3 7.7
4/17/13   Noiret 22.6 17.1 12.5

Hudson Valley

Date Location Variety LT10 LT50 LT90
4/16/13 Hudson Cab Franc 19.0 16.5 12.6
3/25/13   Concord 3.7 -0.2 -3.5
4/16/13   Noiret 23.2 19.8 15.4
4/16/13   Riesling 16.9 15.1 13.1
4/16/13   Traminette   19.4  12.9 10.8
4/16/13   Pinot noir  20.1 17.6  14.4

Bud hardiness testing in other regions:

Thanks to the Lake Erie Regional Grape Program, Inc. and the New York Wine and Grape Foundation for funding this project. Special thanks to Lynn Mills and Markus Keller of Washington State University for sharing the template used to generate the graphs.