Itthiphon khong san chalo kan charoen toepto paclobutrazol thi mi to phonphalit lae khun naphap malet phan thua khieo (Vigna radiata (L.) Wilczek).
1990
Wanchai Chanprasert
Effect of paclobutrazol (PP333) on seeed yield and quality was studied in 4 mungbean varieties, i.e. Uthong 1,KPS 1,KPS 2 and CN-60 in rainy season, 1989, at Kasetsart University. Paclobutrazol at the rate of 120 g.ai/500 litre of water/rai (750 g.ai/ha) was directly sprinkled onto mungbean plants at 45 days after planting (DAP) which was at 8, 11, 8 and 10 days after first flowering of Uthong 1,KPS 1,KPS 2 and CN-60, respectively. Factorial in RCB with 3 replicates was employed in this study. Pod number per plant and seed yield (kg/rai) were significantly increased by paclobutrazol (23 and 16 % over the control,respectively). Paclobutrazol had no effect on node number and branch number per plant in mungbean, although there was a tendency in reducing plant height at harvest. Paclobutrazol tended to delay leaf senescence and seed desiccation during plant maturation while seed germination was not affected by paclobutrazol. Among the 4 mungbean varieties,KPS 1 showed higher pod number per plant while Uthong 1 demonstrated a greater vegetative growth than the other 3 varieties. However, there was no significant differences between varieties in terms of seed yield. KPS 2 produced the highest quality seed in this study.
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