ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Influence of harvest date on fruit quality and storability in the varieties Braeburn and Gala.

Frasnelli, K.; Casera, C.;

COST 94. The postharvest treatment of fruit and vegetables. Determination and prediction of optimum harvest date of apples and pears. Proceedings of a meeting, Lofthus, Norway, 9-10 June 1994. Year: 1996 Pages: 105-115 Ref: 11 ref.

1996

บทคัดย่อ

Fruits of the apple cultivars Tenroy (Royal Gala) and Braeburn were harvested on 2 dates in 1992 and 1993 and stored in a controlled atmosphere (CA; 2.5% O2, 3% CO2) or in ultra-low oxygen (ULO; 1% O2) with CO2 at 1.5 or 3% or, for Braeburn in 1993, 1 or 2% CO2. At harvest and at the end of storage maturity indices and quality parameters were determined. For Tenroy harvested at the optimal picking date, qualitative characteristics such as firmness and titratable acidity after 5 months of ULO storage were highly satisfactory. The highest incidence of internal breakdown occurred in Tenroy in 1993 with prolonged storage (7 months) and delayed harvest. Losses due to internal breakdown after 5 months of storage were not significant. The incidence of rotting was much lower for the first pick than for the second. In Braeburn, firmness at the end of storage was strongly influenced by picking date. Braeburn was susceptible to high CO2 concentration in the ULO store, which led to significant losses from b

rown core and internal CO2 injuries. Lenticel blotch pit and/or bitter pit caused heavy losses during storage when the apples came from orchards with vigorous vegetative growth and poor crop load; these problems led to increased secondary infections.