Resumo

PEREZ-BARRAZA, María Hilda; OSUNA-GARCIA, Jorge Alberto; SANCHEZ-LUCIO, Roberto  e  VAZQUEZ-VALDIVIA, Victor. Paclobutrazol ensures abundant and advanced flowering in 'manila' mango, even without environmental conditions. Rev. Chapingo Ser.Hortic [online]. 2011, vol.17, n.spe1, pp.47-52. ISSN 2007-4034.

In Nayarit, the climactic conditions during the last five years have caused heterogeneous phenological behavior in 'Manila' mango. This situation has induced a high reduction in yield and low fruit quality. The objective of this study was to determine the effect of paclobutrazol (PBZ) and potassium nitrate (KNO₃) on flowering, harvest time, yield and fruit quality of 'Manila' mango. The study was done during 20082009 and 2009-2010 in a ten-year-old 'Manila' orchard. Dosages of PBZ (0, 10, and 20 ml/tree) and KNO₃ (0 and 4 %) were tested. In every treatment, physiological and reproductive aspects were evaluated. During the first cycle (2008-2009), the PBZ treated trees reached 70 and 90 % flowering, while the control trees had only 50 % flowering. During the second cycle (2009-2010), the start of flowering was 23 days earlier in PBZ + KNO₃, while the PBZ treatment alone advanced flowering 15 days compared with the control trees. The PBZ treated trees had a flowering percent between 94 and 98, whereas the control trees had only 64.4 % flowering. Results showed that PBZ ensured abundant and advanced flowering in 'Manila' mango. In addition, in both cycles PBZ increased the yield more than twice when compared to control trees.

Palavras-chave : Mangifera indica L.; growth retardant; temperature; moisture; early harvest.

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