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Control of Weeds in Rice Field Using Allelopathy (an Eco-friendly Concept)

Dr. Parimal Kanti Biswas
Professor
Dept.of Agronomy, Sher-e-Bangla Agricultural University, Dhaka

Abstract/ Executive Summary:

The experiment was conducted in Aman season, 2010. Three rice varieties included in the study were BRRI dhan46, Guti Swarna and Ranjit that assigned to the main plot. Five Allelopathic treatments viz. Control (no allelopathic material), Lantena camera, Goose weed, Bon sarisha and Araich were in the sub-plots. The concentration of allelopathic materials was 0.050 kgm-2. Rice straw had Allelochemical that control weeds in the initial stage of the crop but at 50 days after transplantation it has no effects on it. On the other hand Water hyacinth has the potentiality to add nutrients to the soil that reflected on the growth of the crop as well as higher yield.

Keywords: Control, Weeds, Rice Field, Allelopathy

Location: Sher-e-Bangla Agricultural University, Dhaka

Start Date: 00-07-2010

End Date: 00-06-2011

Program Area: Pest Management

Commodity: Rice

Objectives:

1. To evaluate the allelopathic potential of different naturally grown plants

2.To find out farmer’s friendly method for controlling weeds

3.To identify the promising and potential plant residues/extracts for increasing rice production.

Methodology:

The Research project was completed in the Agronomy department of Sher-e-Bangla Agricultural University, Dhaka during the period from July 2010 to June 2011. The seeds of three rice varieties namely BRRI dhan46, Guti Swarna and Ranjit were collected from Bangladesh Rice Research Institute (BRRI), Joydebpur, Gazipur and local area of Rangpur on June, 2010. The allelopathic materials of Lantena camera, Goose weed, Bon sarisha and Araich were collected from nearby fields.

Source of Information: Final Report of Sher-e-Bangla Agricultural University Research System (SAURES) funded Project.

Article Link (Online Journal):

Funding Source:

1.	Budget: 2,00,000/-

Total Budget (Tk.) : 2,00,000/-

Achievement/Findings:

Rice straw had Allelochemical that control weeds in the initial stage of the crop but at 50 days after transplantation it has no effects on it. On the other hand water hyacinth has the potentiality to add nutrients to the soil that reflected on the growth of the crop as well as higher yield. Variety of Guti swarna control weeds better than the other two studied varieties. The studied Allelopathic materials can control weeds where the Goose weed performed better in the early stage and Araich in the later stage of the crop. But for conclusive recommendation similar more experiments have to be undertaken with other Allelopathic materials on more Rice varieties in different locations.

Knowledge Management: Report/Proceedings