Sweetpotato storage roots can be stored under controlled environments for several months. For example, in the USA, when roots are stored at temperatures of 13–15 ºC and high relative humidity, they can be kept for up to a year (Picha, 1986). The use of temperature-controlled storage of sweet potatoes is usually not economically feasible in tropical developing countries. However, even in the absence of temperature control, storage for 3–4 months has been demonstrated, where roots are selected carefully and stored in traditional pits or clamps in which high humidity is naturally maintained (Hall and Devereau, 2000; van Oirschot et al., 2000).