Quantifying postharvest losses of 'Crimson Seedless' table grapes along the supply chain

A. Blanckenberg, O. A. Fawole, U. L. Opara

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Citation (Scopus)


High incidence of postharvest losses is a major challenge to global food security. Addressing postharvest losses is a better strategy to increase business efficiency and improve food security rather than simply investing more resources to increase production. The lack of primary data on postharvest losses at critical steps in the fruit value chain and the unknown economic, environmental and resource impacts of these losses currently make it difficult to formulate mitigation strategies. This paper quantifies postharvest losses and quality attributes of 'Crimson Seedless' table grapes at farm/packhouse and retail levels. In addition, factors influencing the incidence of losses were investigated to provide a basis for the development of waste mitigation measures. Table grapes were sampled from four farms in the Western Cape Province of South Africa, the largest deciduous fruit production and export region of Southern Africa. Results showed that losses immediately after harvest at the four farms ranged from 8 to 23%. The main reasons for losses were mechanical damage (7.1%), inadequate berry colour (too green, 5%) and decay (1.8%). After packaging, maintaining cold storage (-0.3±0.7°C, 81.3±4.1% RH) was effective in maintaining berry quality up to 14 d during cold storage. Incidence of decay, stem browning and SO2 damage occurred when grapes were transferred to retail fridge storage (5.4±0.6°C, 83.7±2.9% RH) and ambient conditions (25.1±1.3°C, 46.6±6.0 RH).

Original languageEnglish
Title of host publication7th International Conference on Managing Quality in Chains (MQUIC2017) and 2nd International Symposium on Ornamentals in association with 13th International Protea Research Symposium
EditorsE. Reinten, A.A. Tsige, O.A. Fawole, E.W. Hoffman, U.L. Opara, L. de Kock
PublisherInternational Society for Horticultural Science
Number of pages6
ISBN (Electronic)9789462611979
Publication statusPublished - 30 Apr 2018
Externally publishedYes

Publication series

NameActa Horticulturae
ISSN (Print)0567-7572


  • Decay
  • Physicochemical properties
  • SO damage
  • Shelf-life
  • Stem browning

ASJC Scopus subject areas

  • Horticulture


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