Effects of Paclobutrazol on Dry Matter Distribution and Yield in Peanut

Sachiko Senoo and Akihiro Isoda
(Faculty of Horticulture, Chiba University, 648 Matsudo, Chiba 271-8510, Japan)

Abstract
Paclobutrazol, an inhibitor of endogenous gibberellin synthesis, was applied to alter dry matter distribution and to increase seed yield. After the flowering, threele pod filling stage (MPFS), with four concentration levels of the solution (0ppm, 100ppm, 200ppm and 400ppm) were made for determining the proper timing and concentration level of paclobutrazol treatment. The plant height of the treated plots at BPFS and EPFS was shorter than that of the control by more than 10cm and 5cm, respectively. The pod number of the 100ppm and 200ppm plots at any treatment stage was greater than those of the control and the 400ppm plot. The seed yield was increased by the treatment with paclobutrazol at all stages of the treatment. The 100ppm and 200ppm at BPFS and EPFS had greater seed yields, at approximately 370g m-2.