ศูนย์นวัตกรรมเทคโนโลยีหลังการเก็บเกี่ยว

Postharvest treatments of pears.

Meheriuk, M.; Sholberg, P.;

Postharvest News and Information Year: 1990 Vol: 1 Issue: 6 Pages: 441-446 Ref: 115 ref.

1990

บทคัดย่อ

Postharvest treatments involving calcium, high CO2, heat, fruit coatings, ethylene, chemical regulators, irradiation, scald control and fruit scuffing on pears are reviewed. Treatments involving the use of ozone, vibration and other chemical agents are also included. Calcium treatments tend to reduce the incidence of disorders, lower respiration rates and aid in firmness retention but can be injurious to the skin of some cultivars. High CO2 treatments result in delayed ripening, retention of the green skin colour and reduced incidence of disorders but can cause internal injury with long exposure periods. Heat treatments suppress ripening, ethylene production and rot incidence. Fruit coatings lower respiration rates, promote the retention of the green skin colour and reduce moisture loss but may cause internal problems and poor ripening. Ethylene stimulates ripening and is useful in attaining more uniform ripening in early-picked fruit. Chemical regulators affect ripening, incidence of disorders and internal metabolism. Irradiation may act as a stimulant or inhibitor to ripening depending on the dosage used. Some cultivars react unfavourably to the treatment. Scald control is readily achieved with diphenylamine and ethoxyquin, and both are superior to oiled wraps. Agents having a beneficial effect on reduction of scuffing include ascorbic acid, bisulphite and 2-mercaptobenzothiazole.