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Studies on Weed Management in Bushbean

Faruque Ahmed
SO
Agronomy Division, Gazipur

M.S.A. Khan
SO
Agronomy Division, Gazipur

Abstract/ Executive Summary:

A field experiment on weed management in bush bean was carried out at the farm of Bangladesh Agricultural Research Institute, Joydebpur and RARS Jamalpur during rabi season of 2004-2005 to find out the critical period of weeding for bushbean cultivation. Nine treatments viz., No weeding (T₁), Weed free throughout growing period (T₂), Weed free up to 15 DAE then weedy (T₃), Weedy up to 15 DAE then weed free (T₄), Weed free up to 25 DAE then weedy (T₅), Weedy up to 25 DAE then weed free (T₆), Weed free up to 35 DAE then weedy (T₇), Weedy up to 35 DAE then weed free (T₈), Pre-emergence herbicide (Ronstar) application (T₉) were used. Yield and contributing characters of bush bean was significantly influenced by different weed management practices at both the locations. Pre-emergence application of Ronstar @ 2 liter/ha showed some detrimental effect on plant growth which was reflected through reduced plant height at both the locations. Plant emergence was reduced with abnormal leaf shape (crinkle) and the lowest pod yield was recorded from the same treatment at Joydebpur. However, the highest green pods yield was recorded from weed free up to 35 DAE treatments at both the locations.

Keywords: Weed management, Bushbean, Critical period

Location: Joydebpur and RARS, Jamalpur

Start Date: 23-11-2004

End Date: 00-00-2005

Program Area: Pest Management

Commodity: Bush bean

Objectives:

To find out the critical period of weeding in bush bean field.

Methodology:

The experiment was conducted at the central research station Joydebpur, Gazipur and RARS Jamalpur during rabi season 2004-2005. There were nine weed management methods viz. No weeding (T₁), Weed free throughout growing period (T₂), Weed free up to 15 DAE then weedy (T₃), Weedy up to 15 DAE then weed free (T₄), Weed free up to 25 DAE then weedy (T₅), Weedy up to 25 DAE then weed free (T₆), Weed free up to 35 DAE then weedy (T₇), Weedy up to 35 DAE then weed free (T₈), Pre-emergence herbicide application (T₉). The trial was set up in a randomized complete block design with three replications. Herbicide Ronstar 2 liter/ha was sprayed as pre-emergence to the respective plots. The unit plot size was 4m x 3m. Fertilizers were applied @ 20-20-20 N, P and K kg/ha as basal. The bush bean variety BARI Jharshim-1 was used as the test crop. The crop was sown on November 23 and 27, 2004, at Joydebpur and Jamalpur, respectively with maintaining 30 cm line to line and 10 cm plant to plant distance. Data on weed infestations yield and yield contributing characters by different weed management practices were taken.

Source of Information: Annual Report, Agronomy Division 2004-2005, BARI

Article Link (Online Journal):

Funding Source:

1. Asian Development Bank

Budget: 10,000/-

Total Budget (Tk.) : 10,000/-

Achievement/Findings:

Pre-emergence application of Ronstar @ 2 liter/ha showed some detrimental effect on plant growth which was reflected through reduced plant height at both the locations. Plant emergence was reduced with abnormal leaf shape (crinkle) and the lowest pod yield was recorded from the same treatment at Joydebpur. However, the highest green pods yield was recorded from weed free up to 35 DAE treatments at both the locations.

Knowledge Management: Report/Proceedings