EFFECT OF POST-HARVEST TREATMENT OF APPLES WITH SMART FRESH PROTABS ON DENSITY AND ETHYLENE ACTIVITY

DOI: 10.35205/0558-1125-2022-77-171-178
UDC: 547.534.1:664.8.03:634.11

EFFECT OF POST-HARVEST TREATMENT OF APPLES WITH SMART FRESH PROTABS ON DENSITY AND ETHYLENE ACTIVITY

V.V. LEUS, PhD
State Biotechnology University, 61002, Kharkiv, Alchevskykh, e-mail: vitaliyleus79@gmail.com

To prevent losses during storage of apples in countries with developed horticulture, manufacturers use growth regulators based on 1-MCP. In Ukraine, preparations based on 1-MCP are recommended for use during long-term storage of apples for the purpose of restraining ripening and aging, preserving fruit quality.

The purpose of the research was to establish the effect of post-harvest treatment with a new preparation for the Ukrainian market, Smart Fresh ProTabs, during refrigerated storage of fruits of Renet Symyrenka, Golden Delicious, Pinova, Red Jonaprinz, Red Delicious, Fuji apple varieties on changes in fruit density and ethylene activity.

The storage chambers were loaded with fruits for four days. After the chamber was fully loaded with fruits, the air temperature was set at 5.5 ºC, after which the chamber was closed for 24 hours for cooling. The next day, before treating the chamber with Smart Fresh ProTabs, it was well ventilated for 30-40 minutes.

After airing, the fans in the refrigerator chamber were turned on to the forced position, the place of the greatest air movement was determined, where the source of Smart Fresh ProTabs was installed. 24 hours after the start of treatment, the chamber was opened and well ventilated.

As a result of research, the feasibility of processing apple fruits after harvesting with Smart Fresh ProTabs, which provides a significant difference in the pulp density of processed apple fruits, and control samples after a stress test, keeping them for 10 days at a temperature of 18-23 ºС, has been proven. Regardless of the variety, the difference was more than 1 kg/cm2. The research results showed a significant slowing down of the ethylene release of apple fruits treated with the Smart Fresh preparation, which ensures the preservation of the color of the fruits, their commercial appearance, slows down ripening and aging, as well as the loss of pulp density. The Golden Delicious variety responded most effectively to treatment with Smart Fresh ProTabs, for which the intensity of ethylene release decreased by 528 times compared to untreated fruits.

Key words: Smart Fresh ProTab, 1-methylcyclopropene, storage, apples, post-harvest processing, fruit density, ethylene activity

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