Effects of Different Concentrations of Gibberellic Acid on Mango Grafting

The mango is generally propagated by grafting and grafting success depends on several factors. Physiological condition of scion and rootstock plays a vital role in grafting union where external application of plant growth regulators may be helpful to gear up better cambium activity for making grafting joint. Considering beneficial role of plant growth regulators, an investigation was carried out in the botanical garden of Bayero University Kano in year 2023 with different concentration of GA3 (5 ppm,10ppm and 15 ppm) were applied through spray applications at different time intervals (1 day after grafting followed by 21 days after grafting using scion of mango variety paparandan. The experiment was laid out in complete Randomized Design (CRD) with four replications. The result showed that GA3 @5 ppm resulted in highest grafting success with better growth of sprouted shoots. However, leaf number of sprouted shoots was comparatively lower in GA3 treatment of 10 and 15 ppm. In case of all traits under study time of growth regulator application was significantly important irrespective of growth regulators and application of growth regulators at 1 day after grafting followed by the second spray at 21 days after grafting gave the better result. Therefore, GA3 @5ppm applied at 1 day and 21 days after grafting is recommended to improve grafting success in paparandan cultivar of mango.