EFFECT OF PLANT GROWTH REGULATORS AND FERTILIZERS ON LEAF FLUSHING AND QUALITY OF DURIAN

Plant growth regulators (GA₃, Daminozide, and Mepiquat chloride) and various foliar fertilizers (KNO₃, 0–52–34, and Multigold^R) were applied to durian trees at the first sign of leaf bud emergence.
The development of leaf buds was retarded for 3 weeks after the application of daminozide and mepiquat chloride at the concentration of 2,500 ppm.
KNO₃ and high concentration of certain foliar fertilizer (0–52–34) damaged bud scales and delayed the new set of leaf flushing for 2 weeks.
On the other hand, GA₃ and foliar application of Multigold^R promoted leaf bud development.
Not only affecting leaf flushing, KNO₃, 0–52–34, and Multigold^R also increased fruit number per tree by 47 to 143 % with the normal fruit size and quality compared to those of the control.

Frontier in Tropical Fruit Research

U. Punnachit, C. Kwangthong, S. Chandraparnik

https://doi.org/10.17660/ActaHortic.1992.321.36