The removal of ethylene by Bi-On during coldstorage in Controlled Atmosphere of Bramley apple treated with 1-MCP reduces the risk of scald, according to a recent study conducted in Ireland (Sean Mac an tSaoir, John Mansfield, Frances Ward and Suzanne Johnston, AFBI horticulture Loughgall).
Due to the prohibition of the anti-scalding agent DPA, the aim of the trial was to find alternatives to the conservation of Bramley apple treated with DPA in Controlled Atmosphere.
The results show that for a coldstorage of 8,5 months (8/Set/2013 a 24/Junio/2014), the combined use of BiOn and 1-MCP under conditions of Controlled Atmosphere (12%O2 - CO2 =8% and T= 4.5ºC ) obtained a better control of scalding that the use of 1-MCP only.
The combined use of BiOn and 1-MCP obtained a better control of scalding at the output of the Controlled Atmosphere and also after four weeks (see figure 2). Contrary to the Coldstore where Bi-On and 1-MCP were used in combination, in the Coldstore where only 1-MCP was used the level of ethylene rose above 2-3 ppm after 6 months, reaching values of 45 ppm at the end of the conservation. Ethylene exposure is one of the many pre- and postharvest factors that favour the development of superficial scald and its removal contributes to reduce the risk of occurrence.
The results obtained in this trial in Bramley apple open the door to a new application of BiOn in conservation of apple that, extrapolated to other varieties and storage conditions, has a great potential.
Figure 1. Effect of the system of storage in the development of scald (%) in the fruit of four different orchards (A, B, C, C) at the output of controlled atmosphere and after 4 weeks stored in normal cold.