Nasiru Alhassan et al., Journal of Horticultural Science and Biotechnology
A short, pre-storage fumigation with hydrogen sulphide (H2S) gas at 0, 100, 250 and 500 µL L−1 affected development of a range of senescence characteristics of Navel and Valencia oranges and ‘Afourer’ mandarins during storage at 20°C for five weeks.
The greatest beneficial effect was observed with fumigation at 100 µL L−1 H2S which resulted in reduced incidence of calyx drop, calyx browning and fungal decay and production of ethylene and ethanol for all three citrus species.
For Valencia oranges, a lower total soluble solids (TSS): titratable acidity (TA) ratio was observed, arising from both a lower TSS and higher TA than in control fruit.
H2S treatment had no significant effect on the respiration rate in any fruit species.
In general, higher concentrations of H2S were less effective than 100 µL L−1 and often resulted in accelerated loss of quality.
The results suggest that H2S fumigation of citrus prior to storage may be an alternative treatment for delaying the emergence of senescence characteristics such as calyx browning without the use of synthetic auxins.
Pre-storage fumigation with hydrogen sulphide inhibits postharvest senescence of Valencia and Navel oranges and ‘Afourer’ mandarins
Nasiru Alhassan, Ron B. H. Wills, Michael C. Bowyer , John B. Golding and Penta Pristijono
Journal of Horticultural Science and Biotechnology 2020
Picture, ´Afourer´mandarine by online shop Color Naranja