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Application of Growth Regulator for Synchronizing Ripening of Mungbean (2019--2020)

M. O. ALI
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

J. HOSSAIN
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

M. A. ISLAM
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

R. U. CHOUDHURY
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Abstract/ Executive Summary:

A field experiment was conducted at the research field of Pulses Research Centre, Ishurdi and PRSS, BARI, Gazipur during 2019-20 to find out the suitable growth regulator to synchronize ripening of mungbean. There were six treatments viz T₁= Glycel (Glyphosate, 3.70 L/ha), T₂=Gramoxone (Paraquat, 2.25 L/ha), T₃=Great boss (Paraquat 20% and Glyphosate 41%), T₄= Bonmara (2, 4-D Amine, 2.80 L/ha), T₅= Ripen-15 (Ethephon, 1 L/ha), T₆=Control. Treatments did not show a significant effect on the yield contributing characters of mungbean. The highest gross return was obtained from Gramoxon (Tk. 42660) at Ishurdi and Ripen-15 (Tk. 47820) at Gazipur, but the highest MBCR (4.61and 5.02 at Ishurdi and Gazipur, respectively) were got from Gramoxon. It required less labour at harvesting avoiding labour cost for picking up of ripen pods, and dried plants with pods were harvested at a time easily by hand within four days.

Keywords: Growth regulator, Mungbean, Synchronization, Gross return

Location: Pulses Research Centre, Ishurdi and PRSS, BARI, Gazipur

Start Date: 00-00-2019

End Date: 00-00-2020

Program Area: Variety and Species

Commodity: Mungbean

Objectives:

The present study has been undertaken to find out the most effective growth regulator to enhance mungbean ripening at a time.

Methodology:

The experiment was conducted at the research field of Pulses Research Centre, Regional Agriculture Research Station, Ishurdi, and PRSS, BARI, Gazipur during 2019-20 to find out the suitable growth regulator to synchronize ripening of mungbean. The trial consisted of six chemical treatments such as T₁= Glycel (Glyphosate, 3.70 L/ha), T₂=Gramoxone (Paraquat, 2.25 L/ha), T₃= Great boss (Paraquat 20% and Glyphosate 41%), T₄= Bonmara (2, 4-D Amine, 2.80 L/ha), T₅= Ripen-15 (Ethephon, 1 L/ha) T₆=Control. The experiment was designed as a randomized complete block with three replications. The mungbean crop was sown on 25 March 2020 at Ishurdi and 18 March at Gazipur. The unit plot size was 20 m² (4 m x 5m). The fertilizers were applied @20-20-20 kg NPK /ha. BARI Mung-6 was sown with a line spacing of 30 cm@ 25 kg/ha. One hand weeding was done 25 days after sowing (DAS) for controlling the weed. Emitaf (@ 2ml L^-1 was used one time for controlling insects. Growth regulators were applied at 65 days after sowing (03 June 2019). The crop was harvested two times; first on 30 May and second on 25 June 2020 at Ishurdi, and first on 26 May and second on 20 June 2020 at Gazipur. Growth regulator was applied before 2^nd harvest at 80% maturity. Data on yield contributing characters were recorded from 10 randomly selected plants from each plot and the grain yield was recorded from the central area of four square meters of the plot and converted to t ha^-1. For the germination test, twenty-five seeds of each sample were placed in Petri dish containing wet sand. The petri dish was placed at room temperature for 3 days for germination. Seedlings were counted on the third day. Germination percentage was calculated using the following formula (Krishnasamy and Seshu, 1990). R-software package was used for all statistical analyses. The mean differences between treatments were separated by the least significant difference (LSD) at P≤ 0.05 for the measured variables.

Source of Information: Annual Research Report 2019-2020, Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Different growth regulators showed no significant effect on the yield contributing characters. The plant height ranged from 46 to 50 cm at Ishurdi and 44-48 cm at Gazipur, the number of branches plant^-1 ranged from 1.89 to 2.11 at Ishurdi and 1.89-2.22 at Gazipur, the number of pods plant^-1ranged from 19 to 21.44 at Ishurdi and 22-23 at Gazipur, 1000-grain weight ranged from 38 to 41 g at Ishurdi and 44-45 at Gazipur in different treatments. The seed yield varied from 674 to 711 kg ha^-1 at Ishurdi and 714-797 at Gazipur. About a hundred percent of pods were synchronized in the application of Glycel, Gramoxon, and Great boss, Bonmora and Ripen varied from 90% to 92%. Dryness of leaf was also ranged from 95% to 100% in Glycel, Gramoxon and Jajkot. Bonmora showed less effect on the leaf, but Ripen did not affect the plant. Application of the first three chemicals, mungbean were harvested after 4-6 days. The seed germination percentage varied 84%-96%. Economic analysis of different treatments revealed that the highest cost was calculated in Bonmora treatment (Tk. 16720) due to the high cost of chemicals and the lowest cost was computed in Gramoxon (Tk. 9170) due to less labour at harvesting. The highest gross return was obtained from Gramoxon (Tk. 42660) at Ishurdi and Ripen-15 (Tk. 47820) at Gazipur, but the highest MBCR (4.61and 5.02 at Ishurdi and Gazipur, respectively) were got from Gramoxon

Knowledge Management: Report/Proceedings