An experiment was conducted at the field laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh to investigate the effect of different concentrations of Miyodo on performances of sesame. The variety was BARI Til-3 and the concentrations of Miyodo were 2.0, 3.0, 4.0, 5.0 and 6.0 mg L-1 along with a control (distilled water). The test solutions of Miyodo were sprayed on leaves of sesame at 40 days after sowing (DAS). The experiment was laid out in a Complete Randomized Design (CRD) with three replications. In most of the cases, a gradual increase of growth and yield were noticed with the increase in concentration of Miyodo. 5 mg L-1 concentration was found to be the best for plant height, number of branches, number of leaves, number of flowers, total dry matter, number of capsules, number of seeds, capsule length, capsule diameter, seed weight, 1000-seed weight, and seed yield. The results of the experiment revealed that Miyodo at 5 mg L-1 as foliar spray had positive regulatory effect on morphological, growth, yield and yield contributing characters of sesame.

Key words: Miyodo, sesame, growth and yield.

Introduction
Sesame (Sesamum indicum L.) is one of the important oil seed crops widely grown in different parts of the world. The climatic and edaphic conditions of Bangladesh are suitable for cultivation of sesame crop. It is grown in both summer and winter. Sesame is rich in oil 42-50%, protein 14-20% and carbohydrate 20% (BARI, 2001). But, sesame yield is very low in Bangladesh due to lack of proper management practices (Rahman et al., 1994). Miyodo is a newly marketed synthetic plant growth regulator, which was collected from Dr. Yasuo Kamuro, Marketing Director, BAL Planning Company Ltd., Ichinomiya, Japan, through the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh. The producer company has been keeping its composition highly hidden due to commercial reason. Application of Miyodo has been found to increase growth and yield in soybean (Sarker, 2006) and in garlic. Changes in growth, yield and yield attributes of lentil by different growth regulators like TNZ-303, GABA, CI-IAA, GA3 and IAA were studied by few workers (Ali, 2003), but the information regarding the effect of Miyodo on sesame is scantly. Therefore, the present research work was undertaken with the following objectives: to study the effect of Miyodo on performances of sesame and to find out the optimum concentration for desired yield.

Materials and methods
The experiment was conducted at the field laboratory of the Department of Crop Botany, Bangladesh Agricultural University, Mymensingh to investigate the effect of different concentrations of Miyodo on performances of sesame. The seeds of sesame (variety BARI Til-3) collected from the Bangladesh Agricultural Research Institute (BARI), Jaydebpur, Gazipur. The plant growth regulator Miyodo was collected from Dr. Yasuo Kamuro, Marketing Director, Bal Planning Co. Ltd.,