Cornell Cooperative Extension of Westchester County

Growing Degree Days

As of September 27, 2012 Growing Degree Day (GDD) accumulation (Growing Degree Days Base 50) calculated from temperature readings taken at
The Westchester County Airport is 72 as of May 2, 2013.

What are Growing Degree Days?

Growing degree days (GDDs) as applied to the control of insect/arachnid pests of landscape plants are a measure of accumulated heat calculated by subtracting 50 degrees from the average daily temperature. GDDs may be calculated by plant scientists and other plant specialists using a base other than 50 degrees. In New York State, calculations are made from March to the end of September. Knowing the amount of accumulated GDDs helps plant proffessionals and home gardeners monitor stages of insect/arachnid pest activity or target control to a stage when the pest is most vulnerable.

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Please contact CCE of Westchester, 26 Legion Drive, Valhalla, NY, 10595, if you have any special needs.

For more information please e-mail westchester@cornell.edu.


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*Growing Degree Days* As of September 27, 2012 Growing Degree Day (GDD) accumulation (Growing Degree Days Base 50) calculated from temperature readings taken at The Westchester County Airport is 72 as of May 2, 2013. What are Growing Degree Days? Growing degree days (GDDs) as applied to the control of insect/arachnid pests of landscape plants are a measure of accumulated heat calculated by subtracting 50 degrees from the average daily temperature. GDDs may be calculated by plant scientists and other plant specialists using a base other than 50 degrees. In New York State, calculations are made from March to the end of September. Knowing the amount of accumulated GDDs helps plant proffessionals and home gardeners monitor stages of insect/arachnid pest activity or target control to a stage when the pest is most vulnerable. Return to top Please contact CCE of Westchester, 26 Legion Drive, Valhalla, NY, 10595, if you have any special needs. For more information please e-mail westchester@cornell.edu. top