Effect of Daminozide on total Nonstructural Carbohydrates, Total Nitrogen Contents in Leaves and Stem Apexes in Relation to Flowering Ability of Tangerine (Citrus reticulate Blanco cv. Khiew-Waan)

Abstract

The effect of daminozide on flowering, total nonstructural carbohydrates, total nitrogen contents in leaves and stem apexes of tangerine (Citrus reticulate Blanco cv. Khiew-Waan) was studied during January 1985 to Apil 1985. The results showed that daminozide at 2,000 4,000 and 6,000 ppm applied under the normal irrigation condition tened to increase flowering. The rate of 6,000 ppm gave the highest percentage of flowering (38.8%) while the untreated trees produced the lowest percentage of flowering (13.1%). Daminozide at all concentrations showed no effect on the total nonstructural carbohydrate contents in leaves and stem apexes compared to the untreated trees. Daminozide had no effect on the total nitrogen contents after application until flushing but after that flushing stage the trees having daminozide at 6,000 ppm tended to contain the highest total nitrogen contents in leaves and stem apexes.