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Effect of promalin on the physical characteristics of apples malus domestica cultivar delicious grown in 2 geographic locations


Journal of the American Society for Horticultural Science 104(6): 857-860
Effect of promalin on the physical characteristics of apples malus domestica cultivar delicious grown in 2 geographic locations
A commercial formulation of N-(phenylmethl) 1H-purin-6-amine plus gibberellin A4A7 (Promalin) was applied to 'Delicious' apples (M. domestica Borkh.) from 1975-1978 in 2 geographic locations [in Georiga, USA] at rates of 12.5-50 ppm. Promalin at 25 ppm increased fruit weight, length/diameter ratio (L/D) and percent "typey" fruit at both a cool moutain location and at a lower warm elevation. The effect on "typiness" in the warm growing area apparently was not of commercial significance, but the increase in fruit weight did appear significant under these conditions. Response varied with strain. Addition of a spray adjuvant, Triton CS-7, at the lower elevation, did not improve response. Rates of 12.5 or 25 ppm applied at petal fall of the "king" blossom apparently were equally effective under high temperature conditions conducive to oblate fruits.

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Accession: 005264531



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