ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Effect of postharvest calcium infiltration and temperature on the incidence of disorders and fruit decay of 'Jonathan' apples.

Byun, J. K.; Chang, K. H.;

Journal of the Korean Society for Horticultural Science Year: 1991 Vol: 32 Issue: 4 Pages: 484-489 Ref: 23 ref.

1991

บทคัดย่อ

Calcium chloride at 2, 4 or 6% was applied to fruits by dipping, pressure or vacuum. Fruits were then stored at 4 deg C for 90 days followed by 15 deg for 14 days. The effect of CaCl2 infiltration at different pressures (60, 80 or 100 kPa) and different vacuum levels (32, 40 or 48 kPa) were compared. CaCl2 (2%) was also applied at 80 kPa and the fruits stored either at 15 deg for 70 days or at 4 deg for 150 days. All infiltration treatments reduced the incidence of Jonathan breakdown and skin spotting; 2% CaCl2 was the best concentration, reducing the percentage of fruits showing breakdown from 70% in the control to 40% when dipped, 0% under pressure (80 kPa) and 2.5% under vacuum (40 kPa); skin spotting was reduced from 80% in the control to 40% under pressure and 10% under vacuum. Pressure at 80 kPa and vacuum at 40 kPa were the most effective treatments, with the storage disorders reduced to 0-10% compared with 70-80% in controls. There was a higher incidence of disorder when fruits were stored at 15 deg rather than 4 deg , but CaCl2 treatment significantly lowered it. Decay due to Alternaria mali and Botryosphaeria dothidea was 21 and 12.3%, respectively, and was reduced by CaCl2 (2%, 80 kPa) to 2.4 and 3.5%, respectively.