Revista Facultad Nacional de Agronomía, Medellín
Print version ISSN 0304-2847
CASIERRA-POSADA, Fánor; RODRIGUEZ PUERTO, José Israel and CARDENAS HERNANDEZ, Julián. LEAF TO FRUIT RATIO AFFECTS YIELD, FRUIT GROWTH AND FRUIT QUALITY OF PEACH (Prunus persica L. Batsch, cv. Rubidoux). Rev.Fac.Nal.Agr.Medellín [online]. 2007, vol.60, n.1, pp. 3657-3659. ISSN 0304-2847.
Fruit thinning is a standard practice on peach trees carrying a moderate to heavy crop. However, in spite of the many benefits from thinning demostrated through long years of experience in the temperate zone, fruit thinning is too often one of the most unefficiently conducted operations in peach growing. With a view to improve marketable yield and fruit quality, trees of peach (Prunus persica L. Batsch cv. Rubidoux) were subjected to hand thinning. Changes in fruit growth, total soluble solids, pulp:stone ratio, yield, fruit quality and fruit diameter of developing peach fruit were investigated over a single season along with the effects of leaf:fruit ratio (10, 20,30, 40 and 50 leaves per fruit) in Guasca - Cundinamarca - Colombia. Thinning was done 85 days after full bloom. Control trees were unthinned. Differences were observed by fruit growth curves, average of harvested fruit, fresh weight of fruits and marketable fruit quality. Total soluble solids content in the fruits and pulp:stone ratio, were increased by thinning. At harvest, yield was reduced in the thinned trees, but marketable fruit was improved. Treatments with 40 and 50 leaves per fruit showed larger proportion of better quality fruits in comparison to control trees.
Keywords : Fruit growth; sik:source ratio; total soluble solids; pulp:stone ratio.