ISHS Acta Horticulturae 1256: VI International Conference Postharvest Unlimited
Managing stem-end flesh browning, a physiological disorder of 'Gala' apples |
| Authors: | J.F. Nock, F.C. Doerflinger, G. Sutanto, Y. Al Shoffe, N. Gunes, Y. Zhang, A.H. Wright, J. DeLong, C.B. Watkins |
| Keywords: | plant growth regulators, ReTain (aminoethoxyvinylglycine, AVG), Harvista, SmartFresh (1-methylcyclopropene, 1-MCP), controlled atmosphere (CA), dynamic controlled atmosphere-chlorophyll fluorescence (DCA-CF) |
| DOI: | 10.17660/ActaHortic.2019.1256.23 |
| Abstract:
A physiological disorder known as 'stem-end flesh browning' has recently been found in 'Gala' apples in the USA, Canada, and Brazil. The browning originates at the stem end but can extend throughout the fruit with increasing severity. The effects of harvest date, plant growth regulators (PGRs) (aminoethoxyvinylglycine (AVG) (ReTain) and 1-methylcyclopropene (1-MCP) (Harvista)), postharvest 1-MCP (SmartFresh), storage temperature (0.5 and 3°C), and storage method (standard controlled atmosphere (CA) and dynamic controlled atmosphere NDASH chlorophyll fluorescence (DCA-CF)) have been investigated. A Harvista spray was more effective at reducing disorder incidence than a ReTain or SmartFresh treatment. DCA-CF also delayed disorder development, but did not prevent it. Disorder incidence was slightly lower at 3°C than 0.5°C, indicating an advantage to using a slightly warmer storage temperature. The occurrence of stem-end flesh browning can be reduced by pre- and postharvest management through the use of Harvista and DCA-CF, respectively, while also using a storage temperature of 3°C. | |
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