ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Calcium sprays, harvest, and storage impacts on pear.

Raese, T.; Drake, S. R.;

Good Fruit Grower Year: 1998 Vol: 48 Issue: 17 Pages: 70-73 Ref: 4 ref.

1998

บทคัดย่อ

In trials in 1987-91 near Cashmere, Washington, USA, 25-year-old trees of pear cv. D'Anjou [Beurre d'Anjou] were sprayed with CaCl2, with or without Regulaid [surfactant], during early and late June, mid-July and early and late August, and the effects of CaCl2, harvest date and cold storage duration on postharvest fruit quality were investigated. In 1987, fruit firmness was higher in fruits from trees sprayed with CaCl2 for each of the 45-, 90- or 145-day storage regimes. However, the effectiveness of CaCl2 in maintaining fruit firmness was diminished when fruits were harvested in late September compared to harvest in late August/early September. CaCl2 also reduced the incidence of pithy brown core (1987), cork spot (1991) and superficial scald (1991) compared to the control treatment (unsprayed). Incidence of brown pithy core, cork spot and superficial scald increased with storage time and period of ripening, and were highest in fruits harvested in mid-September. Ca concentrations in fruit peel

 and cortex were considerably higher in fruits from trees sprayed with CaCl2 than in fruits from unsprayed trees.