Back to top

Seasonal Bud Low Temperature Exotherms Winter 2009-2010

Final LT50 (Median Bud Freezing Temperature) values for each region during winter of 2009-2010 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 freezing temperatures.

Finger Lakes

      ° Fahrenheit
      Lowest LT
Date Location Variety LT10 LT50 LT90
2010* East Keuka Cabernet Franc -3.3 -9.0 -12.8
    Cayuga White -2.7 -8.0 -14.4
    Concord -8.0 -16.6 -20.0
    Riesling -7.4 -10.7 -15.9
2010* East  Seneca Cabernet Franc -2.2 -7.8 -10.1
    Cayuga White -5.4 -6.7 -11.6
    Concord -11.9 -15.5 -18.4
    Riesling -8.3 -10.8 -13.4
2010 Geneva Concord -11.2 -18.4 -21.3
2010 West Cayuga Cabernet Franc -6.7 -9.0 -14.4
    Catawba -1.1 -9.9 -14.4
    Cayuga White -2.1 -7.4 -11.4
    Riesling -5.6 -10.7 -14.3
2010* West Keuka Cabernet Franc -5.4 -8.3 -10.8
    Cayuga White -0.9 -6.7 -10.5
    Concord -10.5 -16.8 -20.6
    Riesling -7.2 -10.7 -12.6
2010 West Seneca Cabernet Franc -3.8 -8.5 -16.8
    Cayuga White -2.6 -8.1 -9.0
    Concord -7.4 -12.1 -16.6
    Riesling -7.2 -10.7 -15.9

*Not sampled on 3/22/10.  **Final bud mortality from sample of 100 buds collected on 3/22/10

Hudson Valley

    ° Fahrenheit
Date Variety LT10 LT50 LT90
2010 Cab Franc 9.5 5.9 -2.7
2010 Concord 3.2 -7.1 -14.1
2010 Noiret 9.5 -1.1 -6.1
2010 Riesling 6.4 -2.4 -8.7

*Final bud mortality from sample of 100 buds collected on 3/18/10

Lake Erie (Portland)

    ° Fahrenheit
Date Variety LT10 LT50 LT90
2010 Cabernet Franc -2.4 -7.1 -11.0
2010 Cayuga White 0.1 -6.3 -9.0
2010 Concord -6.0 -12.3 -16.2
2010 Riesling -3.5 -7.6 -10.7
         

**Final bud mortality from sample of 100 buds collected on 3/17/10