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Steven J. R. Underhill - One of the best experts on this subject based on the ideXlab platform.
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Postharvest Loss in Fruit and Vegetable Markets in Samoa
Food Security in Small Island States, 2020Co-Authors: Steven J. R. Underhill, Shukrullah Sherzad, Yuchan Zhou, Seeseei Molimau-samasoni, Semua Militini TagoaiAbstract:Postharvest loss is of particular importance in small Polynesian nations such as Samoa, due to declining smallholder participation in agriculture, a greater reliance on food imports, and wider dietary-based population health concerns. Efforts to remediate loss is currently being impeded by little information as to the current levels of horticultural loss in Samoa or the factors contributing to this loss. In this study, we quantified the commercial Postharvest loss of 23 horticultural crops at the Fugalei central municipal market on the Island of Upolu Island, Samoa, using direct weighing. The mean Postharvest loss was further determined in all six municipal, community and private fruit and vegetable markets on the Samoan Islands of Upolu and Savai’i using vendor and farmer-trader surveys. Postharvest horticultural loss in the Fugalei municipal market was 6.2% (determined by weight) and 13.3% (based on vendor recall). There was no significant difference between the mean Postharvest loss in fruits compared to vegetables. The highest level of daily Postharvest loss (5–22%) was observed for soursop, papaya, Tahitian lime, mustard cabbage and choko. Negligible loss (
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A preliminary assessment of horticultural Postharvest market loss in the Solomon Islands
Horticulturae, 2019Co-Authors: Steven J. R. Underhill, Leeroy Joshua, Yuchan ZhouAbstract:Honiara’s fresh horticultural markets are a critical component of the food distribution system in Guadalcanal, Solomon Islands. Most of the population that reside in Honiara are now dependent on the municipal horticultural market and a network of smaller road-side markets to source their fresh fruits and vegetables. Potentially poor Postharvest supply chain practice could be leading to high levels of Postharvest loss in Honiara markets, undermining domestic food security. This study reports on a preliminary assessment of Postharvest horticultural market loss and associated supply chain logistics at the Honiara municipal market and five road-side markets on Guadalcanal Island. Using vendor recall to quantify loss, we surveyed a total of 198 vendors between November 2017 and March 2018. We found that Postharvest loss in the Honiara municipal market was 7.9 to 9.5%, and that road-side markets incurred 2.6 to 7.0% loss. Based on mean Postharvest market loss and the incidence of individual vendor loss, Honiara’s road-side market system appears to be more effective in managing Postharvest loss, compared to the municipal market. Postharvest loss was poorly correlated to transport distance, possibly due to the inter-island and remote intra-island chains avoiding high-perishable crops. Spatial mapping of Postharvest loss highlighted a cohort of villages in the western and southern parts of the main horticultural production region (i.e., eastern Guadalcanal) with atypically high levels of Postharvest loss. The potential importance of market-operations, packaging type, and mode of transport on Postharvest market loss, is further discussed.
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Postharvest handling of tropical fruit in the South Pacific
2018Co-Authors: Steven J. R. Underhill, Salesh KumarAbstract:While tropical fruits represent less than 20% of the net horticultural productivity in the South Pacific, they experience disproportionally high levels of Postharvest loss. Much of this loss is concentrated at the market-end of the value chain. Inter-island fruit value chains and hose associated with transient and opportunistic fruit harvesting practices are particularly vulnerable. When losses occur they are often significant (20% to 80%), but can also be unpredictable. Postharvest loss has been attributed to the combination of low-input fruit production systems, poor Postharvest practices, unpredictable transport, and short product shelf-life. Highly seasonal production with ensuing sporadic market over-supply and resultant prolonged storage further elevates Postharvest loss. Mitigating Postharvest loss within fruit value chains has become increasingly important in recent years as Pacific Governments and donors seek to enhance horticultural exports and improve industry resilience. In this paper, we discuss the current Postharvest challenges facing fruit value chains in the Pacific, with a specific focus on small island developing states. We highlight the interconnectivity between pre-harvest and Postharvest handling remediation, the implications of semi-commercial fruit value chains, and the importance of transport and market system contributors to loss. Further, we discuss strategies undertaken to remediate Postharvest loss, highlight the need for increased institutional capacity building and conclude by proposing a series of targeted interventions aimed at better supporting Pacific fruit value chains.;
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Horticultural Postharvest loss in municipal fruit and vegetable markets in Samoa
Food Security, 2017Co-Authors: Steven J. R. Underhill, Shukrullah Sherzad, Yuchan Zhou, Lila Singh-peterson, Semua Militini TagoaiAbstract:Reducing horticultural Postharvest loss is a priority in Samoa, due to declining agricultural productivity and wider dietary-based health concerns within the human population. Efforts to remediate loss is currently impeded by little information about the current levels of horticultural loss in Samoa or the factors contributing to this loss. In this study we quantified commercial Postharvest loss of 23 horticultural crops at the Fugalei central municipal market on the Island of Upolu, Samoa, using direct weighing. Mean Postharvest loss was further determined in all six municipal, community and private fruit and vegetable markets on the Samoan Islands of Upolu and Savai’i using vendor and farmer-trader surveys. Postharvest horticultural loss in the Fugalei municipal market was 6.2% (determined by weight) and 13.3% (based on vendor recall). There was no significant difference between mean Postharvest loss in fruits compared to vegetables. The highest level of daily Postharvest loss (5% to 22%) was observed for soursop, papaya, Tahitian lime, mustard cabbage and choko. Negligible loss (
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quantifying Postharvest losses along a commercial tomato supply chain in fiji a case study
Journal of Applied Horticulture Lucknow, 2015Co-Authors: Steven J. R. Underhill, Salesh KumarAbstract:This paper reports on a detailed case study of Postharvest losses along a commercial small holder tomato supply chain in Fiji. It is the first systematic quantification of Postharvest horticultural losses undertaken in Fiji. Postharvest loss was measured from harvest through to product arrival at the Suva municipal fruit and vegetable markets, with post-municipal market loss determined using simulated storage conditions. In this study, 32.9% of the harvested product was removed from the commercial supply chain due to rots (8.8%), failure to ripen (8.9%), insufficient volume fill a carton (7.8%), physical damage during transport (0.1%) and fruit being over-ripe (6.4%). Poor temperature management during on-farm product ripening and limited on-farm Postharvest hygiene were key contributors to the observed loss. In trace-back studies to identify the end-use of all product removed from the commercial chain, of the 32.9% total commercial Postharvest loss, 11.0% was consumed at home and/or traded within the village, 6.3% was fed to domestic livestock, and a further 14.7% ended up as on-farm waste or dumped at the municipal refuge. Based on simulated ambient storage condition, once the fruit arrived at the municipal markets, daily Postharvest loss thereafter was between 8.3% and 13.4%. Overall accumulative Postharvest losses based on three days post-market ambient storage was 60.8%. Postharvest ripening, storage and transport conditions along the supply chain are discussed.
Semua Militini Tagoai - One of the best experts on this subject based on the ideXlab platform.
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Postharvest Loss in Fruit and Vegetable Markets in Samoa
Food Security in Small Island States, 2020Co-Authors: Steven J. R. Underhill, Shukrullah Sherzad, Yuchan Zhou, Seeseei Molimau-samasoni, Semua Militini TagoaiAbstract:Postharvest loss is of particular importance in small Polynesian nations such as Samoa, due to declining smallholder participation in agriculture, a greater reliance on food imports, and wider dietary-based population health concerns. Efforts to remediate loss is currently being impeded by little information as to the current levels of horticultural loss in Samoa or the factors contributing to this loss. In this study, we quantified the commercial Postharvest loss of 23 horticultural crops at the Fugalei central municipal market on the Island of Upolu Island, Samoa, using direct weighing. The mean Postharvest loss was further determined in all six municipal, community and private fruit and vegetable markets on the Samoan Islands of Upolu and Savai’i using vendor and farmer-trader surveys. Postharvest horticultural loss in the Fugalei municipal market was 6.2% (determined by weight) and 13.3% (based on vendor recall). There was no significant difference between the mean Postharvest loss in fruits compared to vegetables. The highest level of daily Postharvest loss (5–22%) was observed for soursop, papaya, Tahitian lime, mustard cabbage and choko. Negligible loss (
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Horticultural Postharvest loss in municipal fruit and vegetable markets in Samoa
Food Security, 2017Co-Authors: Steven J. R. Underhill, Shukrullah Sherzad, Yuchan Zhou, Lila Singh-peterson, Semua Militini TagoaiAbstract:Reducing horticultural Postharvest loss is a priority in Samoa, due to declining agricultural productivity and wider dietary-based health concerns within the human population. Efforts to remediate loss is currently impeded by little information about the current levels of horticultural loss in Samoa or the factors contributing to this loss. In this study we quantified commercial Postharvest loss of 23 horticultural crops at the Fugalei central municipal market on the Island of Upolu, Samoa, using direct weighing. Mean Postharvest loss was further determined in all six municipal, community and private fruit and vegetable markets on the Samoan Islands of Upolu and Savai’i using vendor and farmer-trader surveys. Postharvest horticultural loss in the Fugalei municipal market was 6.2% (determined by weight) and 13.3% (based on vendor recall). There was no significant difference between mean Postharvest loss in fruits compared to vegetables. The highest level of daily Postharvest loss (5% to 22%) was observed for soursop, papaya, Tahitian lime, mustard cabbage and choko. Negligible loss (
Junfeng Yang - One of the best experts on this subject based on the ideXlab platform.
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transcriptional activation of anthocyanin biosynthesis in developing fruit of blueberries vaccinium corymbosum l by preharvest and Postharvest uv irradiation
Journal of Agricultural and Food Chemistry, 2018Co-Authors: Junfeng Yang, Wenjun Shi, Zhongzhi Gong, Lu Chen, Zhixia HouAbstract:The effect and mechanism of preharvest and Postharvest ultraviolet (UV) irradiation on anthocyanin biosynthesis during blueberry development were investigated. The results showed that preharvest UV-B,C and Postharvest UV-A,B,C irradiation significantly promoted anthocyanin biosynthesis and the transcripts of late biosynthetic genes (LBG) VcDFR, VcANS, VcUFGT, and VcMYB transcription factor as well as DFR and UFGT activities in anthocyanin pathway in a UV wavelength- and developmental stage-dependent manner. VcMYB expression was positively correlated with that of VcANS and VcUFGT and coincided with anthocyanin biosynthesis responding to the UV radiation. Sugar decreased during Postharvest but increased during preharvest UV radiation in mature fruit. Our results indicate that UV-responsive production of anthocyanins is mainly caused by the activation of anthocyanin downstream pathway genes, which could be upregulated by VcMYB. Furthermore, different potential response mechanisms may exist between preharvest and Postharvest UV radiation in blueberries, involving a systemic response in living plants and a nonsystemic response in Postharvest fruit.
Elhadi M Yahia - One of the best experts on this subject based on the ideXlab platform.
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improvement of the antioxidant status of tropical fruits as a secondary response to some Postharvest treatments
Trends in Food Science and Technology, 2010Co-Authors: Gustavo A Gonzalezaguilar, Jose A Villarodriguez, Fernando J Ayalazavala, Elhadi M YahiaAbstract:Tropical fruits production, trade and consumption have increased significantly due to their attractive sensory and nutrimental properties; nevertheless, their highly perishable nature limits their Postharvest life. Postharvest treatments have been used to preserve quality of fresh produce and have been focused mainly on preserving freshness and avoid microbial growth. However, an improvement on the antioxidant system as a secondary response under certain adverse environmental and stress conditions has been observed, including some types of stress used as Postharvest treatments. This review focuses on analyzing and proposing some possible mechanisms induced by Postharvest treatments affecting the antioxidant status of treated tropical fruits.
Zhixia Hou - One of the best experts on this subject based on the ideXlab platform.
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transcriptional activation of anthocyanin biosynthesis in developing fruit of blueberries vaccinium corymbosum l by preharvest and Postharvest uv irradiation
Journal of Agricultural and Food Chemistry, 2018Co-Authors: Junfeng Yang, Wenjun Shi, Zhongzhi Gong, Lu Chen, Zhixia HouAbstract:The effect and mechanism of preharvest and Postharvest ultraviolet (UV) irradiation on anthocyanin biosynthesis during blueberry development were investigated. The results showed that preharvest UV-B,C and Postharvest UV-A,B,C irradiation significantly promoted anthocyanin biosynthesis and the transcripts of late biosynthetic genes (LBG) VcDFR, VcANS, VcUFGT, and VcMYB transcription factor as well as DFR and UFGT activities in anthocyanin pathway in a UV wavelength- and developmental stage-dependent manner. VcMYB expression was positively correlated with that of VcANS and VcUFGT and coincided with anthocyanin biosynthesis responding to the UV radiation. Sugar decreased during Postharvest but increased during preharvest UV radiation in mature fruit. Our results indicate that UV-responsive production of anthocyanins is mainly caused by the activation of anthocyanin downstream pathway genes, which could be upregulated by VcMYB. Furthermore, different potential response mechanisms may exist between preharvest and Postharvest UV radiation in blueberries, involving a systemic response in living plants and a nonsystemic response in Postharvest fruit.
