The understanding of risk management and its use for managing by the executive and staff in Rambhai Barni Rajhabat University.

Abstract

Young fruit fall of durian, which is caused by the leaf flushing during the fruiting period, is a serious problem for the farmers. Therefore, this research aims to study the effect of paclobutrazol on the inhibition of young leaf flushing of Durian var. Monthong during the fruiting stage. The experiment was conducted at durian orchards, Makham District, Chanthaburi Province. The experimental design was a Completely Randomized Design with 5 replications. Four treatments were control (water spraying), and three concentrations (500, 1000 and 1500 ppm) of paclobutrazol. The solution of each treatment was sprayed to the durian shoot during the fruiting stage. The young leaf initiation, percentage of young leaf flushing, leaf number per shoot, shoot length, SPAD value of leave, height and diameter of durian fruit were recorded in 1^st and 2^nd month after spraying.

The results revealed that the durian trees sprayed with paclobutrazol with the concentration of 500, 1000, and 1500 ppm demonstrated a slower pace of leaf flushing. In addition, the percentage of young leaf flushing, leaf number per shoot, and shoot length showed lower percentage compared to the trees sprayed with water. While the trees sprayed with water and paclobutrazol with all