Doses and application time of gibberellic acid on flowering and harvest of mango 'Ataulfo'.
Vásquez Valdivia V., Pérez Barraza M. H.
Author Affiliation: Campo Experimental Santiago Ixcuintla, Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias, Apdo. Postal 100, 63300, Santiago Ixcuintla, Nay., Mexico.
Revista Fitotecnia Mexicana 29 : 197-202
Abstract : A study was conducted to evaluate the effect of canopy spray of gibberellic acid (GA3) on flowering, harvesting date and yield of mango cv. Ataulfo. Twelve-year-old Ataulfo mango trees with similar vigour were sprayed before flowering with single or double GA3 applications at three different rates (0, 50 and 100 mg/litre) for two consecutive years. GA3-treated trees had two flowering dates (January to March and April to May) and two harvesting dates (June and July) while control trees showed only one flowering date (January to March) and one harvesting date (June). Mixed panicles (?16%) were detected in GA3-treated trees, while the control trees had none. The delay in flowering and harvesting dates was 90 and 42 days, respectively. Fruit yield was not affected by GA3 applications.