Two evaporatively cooled stores (Fig.1) with the capacity to each hold 5 tonnes of sweetpotato roots were constructed in Kenya, one run on mains power and the other on solar. Using the evaporative cooling system temperatures of 20-23°C were achieved and fresh sweetpotato storage trials kept 63-83 % of the roots of the variety Vita suitable for puree production relative to initial weight after 4 months of storage and 54-59% of the roots for the variety Kabode. A solar-powered standard refrigeration store was constructed from a shipping container, air conditioner and Coolbot to achieve storage temperatures of 15°C and curing temperatures of up to 30°C and humidification. Storage trials in this cooler store reduced sprouting and weevil infestation problems but suffered from higher rotting, with just 35-56 % of root material suitable for puree after 4 months. De-haulming prior to harvest improved root storability. Further work is needed to understand the impact of varietal differences, curing and storing conditions, air flow and air exchange rates in stores.
Authors: Tanya Stathers, Marcelo Precoppe, Andrew Marchant, Debbie Rees, Bethwell Kipkoech, Benard Otieno, Jan Low
Subjects: Inclusive value chains, Sweetpotatoes, Sweetpotato agri-food systems
Publisher: International Potato Center
Publication Date: August 31, 2019
Rights: Open access: CC-BY-4.0
HOW TO CITE
International Potato Center. 2019. SASHA Brief 19. Strategies for storage of orange-fleshed sweetpotato in Sub-Saharan Africa to ensure supplies for processing: Lessons learnt and the way forward. Sweetpotato Action for Security and Health in Africa Project (SASHA). CIP. 4 p.