Performance of 13 Citrus Cultivars as Rootstocks for Grapefruit1

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Abstract
Yield, fruit quality, growth, and the levels of 12 elements in the leaves of 14-year old nucellar ‘Redblush’ grapefruit on 13 rootstocks showed that trees on Citrumelo C.P.B. 4475, ‘Morton’ citrange, and ‘Bittersweet’ sour orange were the most productive; those on ‘Ponkan’ mandarin, seedlings on their own roots, and sour orange were the least productive3. Two-year means of total soluble solids ranged from 10.3% for fruit from trees on ‘Bittersweet’ sour orange, ‘Carrizo’ citrange, and ‘Ponkan’ mandarin to 11.3% on sour orange. Fruit size was best on ‘Bittersweet’ sour orange and on Citrumelo C.P.B. 4475. Effects of rootstock on the levels of N, K, Mg, Mn, Zn, Na, and Cl and B in the leaves were statistically significant.

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