GDD Calculator

Growing Degree Days (GDD) is a simple model to relate the air temperature to growth, development of crops and pests incidence. It is calculated by deducting the base temperature from the mean daily temperature [(Tmax+Tmin)/2] , which is crop or pest specific. If the mean daily temperature is below the base temperature, no GDDs are accumulated. This also useful in studying the suitability of a crop variety to a new environment.