Effect of paclobutrazol soil drenching on flowering of 'Mahachanok' cultivar

R. Muengkaew, P. Chaiprasart
In order to study the effect of paclobutrazol soil drenching on flowering of Mango cultivar 'Mahachanok', the experiment was laid out in a randomized complete block design (RCBD) employing uniform ten years old and 4 m diameter mango trees with six replications and each replication had only one tree. Mango trees were selected from the exported mango growers at Noenmapang District, Phitsanulok. For new leaf flushing, mango trees were pruned and sprayed with 0.5% (2.5 g L-1) thiourea and 0.5% potassium nitrate. After one month, the mango leaves reached to immature stage of development (pasalad leaf). Paclobutrazol (PBZ) soil drenching was applied at this stage at 30, 60, 90, and 120 g, and was compared with no application as control. Results showed that the PBZ applications at 120 g presented the highest total non-structural carbohydrates (TNC) in leaf, shoot and inflorescence. This application also showed the flowering time 50% at 59 days after PBZ soil drenching and 100% the terminals flowering. While, the control treatment showed flower induction later than PBZ treatments for 24-32 days and new leaf flushing of approximately 30-40%. The application of PBZ 30 and 60 g also found that 80-90% the flower induction and 10% new leaf flushing.
Muengkaew, R. and Chaiprasart, P. (2016). Effect of paclobutrazol soil drenching on flowering of 'Mahachanok' cultivar. Acta Hortic. 1111, 323-328
DOI: 10.17660/ActaHortic.2016.1111.46
paclobutrazol (PBZ), total non-structural carbohydrates (TNC), % flowering, mango

Acta Horticulturae