AbstractA 10-year study was conducted at the Fortuna Research and Developing Center to determine the effect of dwarfing rootstock on tree size and yield of selected mango varieties. Eldon as rootstock significantly reduced scion diameter of all varieties studied. However, its effects on average number of fruits produced per tree were inconsistent. Eldon as rootstock also produced significant reductions in tree height when Palmer and Irwin were used as scions. Significant reductions in tree height of the Edward variety were obtained with the combination of Julie as rootstock. Palmer produced the tallest trees and Irwin the smallest; the same pattern was observed for canopy volume. Eldon was most effective in reducing canopy volume for Palmer and Irwin as scions, whereas the greatest reduction in canopy volume for Edward was obtained on Julie. Irwin had the greatest yield efficiency regardless of the rootstock used; Palmer was the least efficient. Irwin was also superior in terms of total fruit weight per tree. There was no consistent influence of rootstock on total fruit weight per tree.
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