1 Pre- and Postharvest 1-MCP Technology for Apples Dr. Jennifer DeEll Dr. Jennifer DeEll Fresh Market Quality Program Lead Fresh Market Quality Program Lead OMAFRA, Simcoe, Ontario, CANADA OMAFRA, Simcoe, Ontario, CANADA • Definitions – SmartFresh SM vs. Harvista TM • SmartFresh and disorders, especially external CO 2 injury • SmartFresh on ‘Honeycrisp’ • Harvista applications, ‘McIntosh’ and ‘Honeycrisp’ Specific topics Specific topics… DeEll, 2010 DeEll, 2010 1-Methylcyclopropene (1 Methylcyclopropene (1-MCP) MCP) • Inhibits ethylene action, delays fruit ripening Inhibits ethylene action, delays fruit ripening SmartFresh SmartFresh SM SM • Volatile form Volatile form • Postharvest application within an air Postharvest application within an air-tight environment tight environment • Used commercially worldwide Used commercially worldwide Harvista Harvista TM TM • Orchard spray for tree fruit, within 2 weeks of harvest Orchard spray for tree fruit, within 2 weeks of harvest • Not registered in Canada yet Not registered in Canada yet • Used commercially in WA this season Used commercially in WA this season DeEll, 2010 SmartFresh SmartFresh SM SM • Reduces senescence related disorders Reduces senescence related disorders i.e. senescent breakdown i.e. senescent breakdown • Increases stress Increases stress-related disorders related disorders i.e. external CO i.e. external CO 2 injury, flesh browning injury, flesh browning External CO External CO 2 Injury Injury DeEll, 2010 Susceptibility increases with – • SmartFresh (1 SmartFresh (1-MCP) treatment MCP) treatment • rapid establishment of CO 2 levels before apples are cooled • low O 2 concentrations (with similar O 2 levels) • poor ventilation • free moisture on the skin • immature fruit • ReTain application Rough brown or bronze lesions on the skin, often partly sunken, with well-defined edges More common on non-blush areas Injury usually occurs early in CA storage 1999 1999- 2000 2000 Québec ‘ McIntosh McIntosh’ Standard CA storage for 2.5 or 5 months External CO External CO 2 Injury Injury DeEll, 2010 1-MCP Control 1 0.5 0.1 ppm 2.5 mo 0 36 55 28% 5 mo 0 25 23 25 %
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Transcript
1
Pre- and Postharvest
1-MCP Technology
for Apples
Dr. Jennifer DeEll Dr. Jennifer DeEll
Fresh Market Quality Program LeadFresh Market Quality Program Lead