Relationships between preharvest horticultural oil application and postharvest behaviour of ‘Golden Delicious’ apple.
Muller I., Mattinson D.S., Fellman J.K.
5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.46
2004
บทคัดย่อ
Relationships between preharvest horticultural oil application and postharvest behaviour of ‘Golden Delicious’ apple.
Horticultural oils, commonly applied to apples throughout the growing season, function as insecticide, fungicide, and spray adjuvant.The influence of oil applications on fruit quality and storage behaviour of apples is not well understood.Our study characterized the effects of growing season-applied oil spray on at-harvest and postharvest behaviour of ‘Golden Delicious’ apples, as well as determined the effects of oil application on the chemical composition of surface lipids and cuticular morphology.Two years of field and storage experiments with apples grown in Pullman and Yakima, WashingtonUSA, tested the following variables: time of application, duration of storage , and influence of storage atmosphere.Fruit measurements included common maturity indices, respiration rate, ethylene evolution, internal ethylene concentration, volatile aroma emission, and surface wax structure.Apples sprayed with 1% soybean oil emulsion showed altered maturation patterns, aroma volatile production and surface wax development, all dependent on field application timing.No phytotoxicity was observed and fruit finish was not affected by soybean oil treatment.In the second year of experimentation, additional observations were made on fruit growth rates, weight loss in storage and during shelf-life period, amount and chemical composition of surface wax, and flavour regeneration capability after CA storage.Based on these data, we conclude that soybean oil application has the potential to alter postharvest behaviour and subsequent storage quality of ‘Golden Delicious’ apples.