The Triple S Method of Producing Sweet Potato Planting Material for Areas in Africa with Long Dry Seasons

Namanda, S.; Amour, R.; Gibson, R. W.

doi:10.1080/15427528.2012.727376

Cited by 25 publications

(19 citation statements)

References 5 publications

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“…As outlined in the plant disease section below many areas are developing better methods of helping smallholder produce clean planting material to prevent the spread of plant viruses, these methods also help reduce weevil infection of planting material (Namanda et al, 2012;Low, 2013). Smallholder farms usually use vine cuttings as planting material (Namanda et al, 2012).…”

Section: Planting Density and Propagation Materialsmentioning

confidence: 99%

“…Wang et al (2010) found that yield advantages lasted two generations and recommended that PT planting material be accessed every two years. Various programs in Africa are examining the best methods for production and distribution of clean planting material in Africa (Namanda et al, 2012;Low, 2013). Wider use of PT material in developing countries presents great opportunities to reduce crop losses, from viruses in particular, but the need for farmers to be able to access new PT material frequently is challenging in terms of production and distribution infrastructure.…”

Section: Pathogen Testingmentioning

confidence: 99%

“…Research using oils derived from indigenous medicinal plants to control soft rots has also shown potential for smallholder systems (Simeon & Abubakar, 2014;Umunna & Anselem, 2014). Sweetpotato can be stored in grass-or sand-lined pits (Bourke, 1982;Namanda et al, 2012) but in smallholder farming systems progressive harvesting is likely to remain the main method of 'storage'.…”

Section: Post-harvest Managementmentioning

confidence: 99%

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Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Johnson

Gurr

2016

Ann Appl Biol

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Sweetpotato has been the subject of little research worldwide compared with other major crop staples, and this is especially so for less developed countries where sweetpotato is critical for food security. This review synthesises information on plant protection issues that affect smallholder sweetpotato farmers in less developed countries to identify major issues and suggest research priorities. Though the pests and diseases of sweetpotato in less developed countries are largely common to industrialised systems, their relative importance differs and losses tend to be more severe as a result of differing agronomic practices and relative unavailability of management options and technical support that are important in developed countries. Smallholders are heavily reliant on cultural practices such as traditional forms of biological control using ants and livestock, fallowing and composting (sometimes with plant materials having biocidal properties). Crop protection methods that have been developed for use in sweetpotato production in developed countries, such as pathogen-tested planting material, early maturing varieties, pheromone trapping and pesticides are less accessible to, and relevant for, smallholders. Smallholders also typically harvest a given crop progressively which extends the period over which storage roots are potentially vulnerable to attack but reduces the risk of post-harvest losses. Human population growth in developing countries is leading to an increase in cropping intensity with shorter fallow periods and more years of continuous crops. This has the dual effect of depleting soil nutrients and increasing the potential for pest and pathogen build-up. Associated with this, the adoption of strategies to manage crop nutrition, such as not burning crop residues, promote carryover of pests and pathogen inocula. As a consequence of these factors, sweetpotato yield losses from diseases, especially viruses, and pests, particularly weevils, can be high. Climate change is likely to result in more frequent drought and this will increase losses caused by sweetpotato weevils that are favoured by dry conditions. This review of sweetpotato pests and their management options concludes with suggestions for some future research priorities including the combination of traditional practices that have pest management outcomes with relevant practices from industrial production that are able to be transferred or modified for use in smallholder production. Increased technical support for decision making and diagnostics, including molecular approaches that have scope for field use, will be important in reducing the burden imposed by biotic threats to this important global crop.

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Section: Planting Density and Propagation Materialsmentioning

confidence: 99%

Section: Pathogen Testingmentioning

confidence: 99%

Section: Post-harvest Managementmentioning

confidence: 99%

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Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Johnson

Gurr

2016

Ann Appl Biol

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“…A 'sand, storage and sprouting' (triple S) system has been developed to preserve roots in dry cool sand, which are planted prior to the onset of the rainy season and produce sprouts for vine multiplication prior to planting (Namanda et al, 2013). It should, therefore, be possible to use the same method for storage of sweetpotato for food.…”

Section: Introductionmentioning

confidence: 99%

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

Atuna

Carey²,

Amagloh

2017

IJPTI

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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.

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“…In this study, storage in sand and sprouting, denoted as the triple-S system that was designed for production of planting material (Namanda et al, 2013), was modified and investigated as a homestead storage method of roots for consumption. The objective was to assess the effect of curing and household-level storage methods on the sensory qualities of two orange-fleshed sweetpotato cultivars: Apomuden (19% dry matter content) and Nane (27% dry matter content).…”

Section: Introductionmentioning

confidence: 99%

Sensory quality of orange-fleshed sweetpotato cultivars as affected by curing and household-level storage methods

Atuna¹,

Amagloh²,

Carey³

et al. 2017

Afr. J. Food Sci.

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A 2×2×3 factorial design was used to investigate the effect of two orange-fleshed sweetpotato cultivars, three curing treatments and two homestead storage methods on the general appearance, finger-feel firmness, sweetness and overall acceptability of boiled roots. The cultivars were Apomuden and Nane, and the two homestead storage methods were the sand box and the heap storage. In-ground curing (dehaulming) and field-piled curing, for seven days and then uncured treatment were the curing options investigated. A hedonic scale ranging from 1 = extremely dislike to 5 = like extremely was used. For cultivars, the sensory scores ranged from 3.20 to 3.84 (farming season I) and 3.32 to 3.93 (farming season II), indicating good consumer preference. Curing type significantly (p<0.05) influenced the sensory properties of roots in the second farming season. Storage type showed no significant difference (p > 0.05) in all sensory attributes in both farming seasons except for sweetness and the heap storage had significantly higher (3.84 vs. 3.47, p<0.0001; respectively) score relative to sand box in the first year. Apart from general appearance (3.64 vs. 3.32, p = 0.002) and finger-feel firmness (3.51 vs. 3.25; p = 0.006) in which females had a significantly higher score than males in the first farming season, all the other sensory attributes were similarly ranked by males and females for both years. In-ground and field-piled curing methods, there is increased consumer acceptability and it should be encouraged.

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The Triple S Method of Producing Sweet Potato Planting Material for Areas in Africa with Long Dry Seasons

Cited by 25 publications

References 5 publications

Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

Invertebrate pests and diseases of sweetpotato (Ipomoea batatas): a review and identification of research priorities for smallholder production

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

Sensory quality of orange-fleshed sweetpotato cultivars as affected by curing and household-level storage methods

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