This information is updated weekly from March through October to provide current data for use in making pest management decisions.
The accumulated Growing Degree Days value from October 13, 2020 to October 31, 2020 is:
This is the last GDD report for this year. We will begin monitoring GDD in March of 2021.
About Growing Degree Days (GDD)
The GDD are a measure of heat accumulation used by horticulturists, gardeners, and farmers to predict plant and animal development rates. For example:
Determine stage of crop development and maturity
Predict insect emergence from dormancy and developmental life stage
Estimate plant development and reproduction
By monitoring the GDD on a daily or weekly basis it is possible to make accurate and timely decisions to protect and enhance your crop or plants.
Growing Degree Day values for various insects
Eastern Tent Caterpillar
Pine Tip Moth
Azalea Lace Bug
Two-spotted Spider Mite
Boxwood Leaf Miner
How It’s Calculated
Calculating GDD is determined by the difference between the daily average air temperature and the base temperature of 50 degrees Fahrenheit (10 degrees Celsius). You must first find the mean temperature for the day. The mean temperature is found by adding together the high and low temperature for the day and dividing by two:
Max Temperature plus Minimum Temperature divided by 2 minus Base Temperature equals the Daily GDD