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- Author or Editor: Hesham Gawad x
- HortScience x
Abstract
Forty days after treatment with 14 C-ethephon 23.6% of the applied radioactivity was recovered from the total fruit. The level was reduced to 19.0% after 95 days as a result of lower radioactivity in the extracted fruit; the surface level remained constant. Radioactive metabolites noted by 40 days after treatment were still prominent by 95 days.
A stepwise multiple regression analysis, using payment by processors as the dependent variable (Y) and numerous physical and chemical characteristics as the independent variables (X), demonstrated that the primary factor determining `Manzanillo' olive (Olea europaea L.) value at harvest was size. Optimal crop value correlated strongly with the combined percentage of standard, medium, large, and extra-large olives; R' values were 0.93***, 0.93***, and 0.42 (ns) in 1984, 1985, and 1986, respectively. As the harvest season progressed, increased percentages of olives within these size classifications, not weight increases of individual olives within the size categories, produced the increase in value. Individual olives within size categories maintained the same weight through the harvest season, regardless of tree crop load. The best criterion for predicting optimal harvest time “is the total percentage of standard, medium, large, and extra-large olives.