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The effects of 1-MCP (EthylBloc) on tropical and subtropical fruit

M.E. Adkins, P.J. Hofman, B.A. Stubbings and A.J. Macnish

aMaroochy Research Station, Queensland Horticulture Institute, Department of Primary Industries, PO Box 5083 SCMC, Nambour, 4560, Australia

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บทคัดย่อ

The effects of 1-MCP (EthylBlocฎ) on tropical and subtropical fruit

The potential for 1-MCP to delay ethylene-stimulated ripening in a range of tropical and sub-tropical fruit was investigated. Mature ‘Hass’ avocado, ‘African Pride’custard apple and ‘Kensington Pride’ mango fruit were treated with 5-2000nL L-1 1-methylcyclopropene (1-MCP) for 3-36 h at 20ฐC followed by exposure to ethylene for 24 h. Mature ‘Pinks Mammoth’ custard apple were exposed to several concentrations of 1-MCP then stored at 10ฐC for 6-12 days. 1-MCP significantly delayed ripening and increased the days to eating soft (DTES) for all fruit commodities compared to non 1-MCP treated fruit. Maximum DTES for all fruit occurred with 500 nL L-1 1-MCP after at least 6 h exposure. 1-MCP increased stem end rots in avocados although levels were dependant on fruit source. 1-MCP increased skin black discolouration on ‘African Pride’, but not on ‘Pinks Mammoth’ custard apple. 1-MCP has the potential to delay fruit ripening associated with ethylene treatment. However, cultivar variability and cultural practices need to be considered.