EFFECT OF GIBBERELLIC ACID ON FLOWERING OF 'ATAULFO' MANGOS

V. Vázquez-Valdivia, M.H. Pérez-Barraza, J.A. Osuna-García
In Nayarit, México, one of the most important problems in mango is the concentration of harvesting time, which occurs from June to July. It leads to saturated markets and the price drops drastically. An alternative to overcome this problem is flowering manipulation, either early or delayed flowering. The objective of this study was to evaluate the effect of gibberellic acid on ‘Ataulfo’ mango flowering. A 12-year old commercial orchard of ‘Ataulfo’ mango cultivar was selected, grafted on seedling rootstocks. Two gibberellic acid doses were evaluated (50 and 100 ppm) in two application dates (December 4 and 18) and a twice application treatment (December 4 and 18), plus the control without application. Flowering intensity was registered from January to May. GA3 treated trees presented two well-defined flowering periods, one in January-February (normal flowering) and another in April-May (delayed flowering); untreated trees only showed a normal flowering. Flowering intensity was affected by GA3 application. Intensity of normal flowering for GA3 treated trees ranged from 63 to 90% while the control had 100% flowering. In delayed flowering, observed only in AG3 treated trees, flower intensity was from 12.5 to 17.1% for the 100 ppm treatment; while for the 50 ppm treatment, it varied from 2.5 to 9.33%. There was a difference about 90 days in which both flowerings reached a maximum intensity (full blooming). The GA3 increased the presence of mixed shoots (panicles with flowers and leaves) from 6 to 13%, while for the control the intensity of this type of panicle was only 2%. The double application of GA3 was the treatment that had lower intensity of flowering with a 78.83% of the total flowering (normal and delayed).
Vázquez-Valdivia, V., Pérez-Barraza, M.H. and Osuna-García, J.A. (2009). EFFECT OF GIBBERELLIC ACID ON FLOWERING OF 'ATAULFO' MANGOS. Acta Hortic. 820, 413-418
DOI: 10.17660/ActaHortic.2009.820.50
https://doi.org/10.17660/ActaHortic.2009.820.50
flowering manipulation, normal flowering, delayed flowering
English

Acta Horticulturae