Open Access Article

Title: Shelf life extension of sweetpotato (Ipomoea batatas (L) Lam) storage roots using household-level storage methods

Authors: Richard Atinpoore Atuna; Edward Ewing Carey; Francis Kweku Amagloh

Addresses: Department of Biotechnology and Molecular Biology, University for Development Studies, P.O. Box 1882, Tamale, Ghana ' International Potato Center, c/o CSIR Savanna Agricultural Research Institute (SARI), P.O. Box 3785, Kumasi, Ghana ' Department of Food Science and Technology, University for Development Studies, P.O. Box 1882, Tamale, Ghana

Abstract: Three sweetpotato cultivars; OFSP-1, OFSP-2 and WFSP were investigated for storability using two storage methods (heap vs. sand box), following curing (dehaulming, field-piled or no curing). Storage roots (SRs) were subsequently stored using either heap or sand box methods. SRs were deliberately injured and wound healing assessed over a 6-day period. Over an 11 week storage period, OFSP-2 recorded the highest weight loss (9.7%; p = 0.04), weevil damage (3.7%; p = 0.49) and rot (21%; p < 0.001). Weight loss and weevil damage were respectively 1.8-times and 23-times higher in the SRs stored in heap method compared with those in the sand box method. Except for WFSP, the wound healing score increased gradually to the 3rd or 4th day for OFSP-2 and OFSP-1 respectively before levelling off. The sand box method performed better than heap storage should be encouraged for the storage of sweetpotato SRs at the household-level.

Keywords: dehaulming; lignification; sand box; wound healing; sweetpotato.

DOI: 10.1504/IJPTI.2017.092450

International Journal of Postharvest Technology and Innovation, 2017 Vol.5 No.4, pp.274 - 285

Accepted: 31 May 2017
Published online: 13 Jun 2018 *