Articles

PREHARVEST APPLICATION OF 1-METHYLCYCLOPROPENE (1-MCP) TO CONTROL FRUIT DROP OF APPLES, AND ITS EFFECTS ON POSTHARVEST QUALITY

Article number
877_46
Pages
365 – 374
Language
English
Abstract
Application of 1-MCP to maintain quality of horticultural produce, especially apples, is now well established.
In this paper, we report the results of 1-MCP application to apple trees in the field as a commercial formulation known as Harvista, which received Environmental Protection Agency registration in 2008. The effects of Harvista on fruit drop and on the maturity and quality of fruit at harvest and after storage has been studied using ‘Delicious’, ‘Empire’, ‘Gala’, ‘Jonagold’, ‘Macoun’, ‘McIntosh’ and ‘Honeycrisp’. The results show that responses among cultivars can vary depending on the normal levels of preharvest drop, but overall, Harvista markedly delays fruit drop in susceptible cultivars.
Harvista results in lower internal ethylene concentrations and starch indices, and firmer fruit at harvest, although the specific harvest indices affected differ by cultivar.
The effects of Harvista on quality factors such as firmness can be maintained during air and controlled atmosphere storage, but the persistence of these effects are related to harvest maturity.
In this paper, results for ‘McIntosh’ and ‘Delicious’ are provided to illustrate the effects of Harvista on preharvest drop, and storage quality with and without postharvest 1-MCP.

Publication
Authors
C.B. Watkins, H. James, J.F. Nock, N. Reed, R.L. Oakes
Keywords
Malus domestica, Harvista, storage, firmness, quality, ethylene
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