Herbicidal weed control in boro rice

S.M. Rezaul Karim, and Al Emran, (2011) Herbicidal weed control in boro rice.

Abstract

An experiment was carried out during December 2008 to June 2009 at the Agronomy Farm of Bangladesh Agricultural University, Mymensingh to study the effectiveness and economic importance of herbicides, in boro rice varieties: Surjamoni and BRRI dhan29. Ten weed control treatments were weedy check; Aimchlor 5G @ 25 kg ha-1; 20 kg ha-1; 30 kg ha-1; Topstar 400SC @ 190 ml ha-1; 152 ml ha-1; 228 ml ha-1; Superheat 500EC @ 1.0 l ha-1; 0.80 l ha-1 and 1.20 l ha-1. Among the herbicides Superheat 500EC @ 1.20 l ha-1 was the most efficient with the lowest weed population, weed dry weight and highest weed control efficiency with the variety BRRI dhan29. Yield and yield contributing characters such as plant height, grains/panicle, 1000-grain weight, grain and straw yields were significantly influenced by the interaction between variety and weed control treatments. Among the herbicides, Topstar 400SC @ 152 ml ha-1 produced the highest grain yield (5.0 t ha-1) which was 57.73% higher than control (3.17 t ha-1) in case of tall variety, Surjamoni. Maximum gross margin with Superheat 500EC @ 1.20 l ha-1 suggested that this herbicidal treatment can be used as an alternative when labor is a limiting factor in boro season rice cultivation. Visual observation indicated that all three herbicides were not so toxic to rice plants. There were 3 different weed species infested the field among which Echinochloa crusgalli followed by Paspalum distichum was the most dominated weeds in terms of weed density and importance value.

Item Type: Non-Indexed Article
Keywords: Economic weed control - Herbicides and boro rice.
Faculty: Faculty of Agro - Based Industry
Deposited By: En. Pahmi Abdullah
Date Deposited: 28 May 2012 20:18
Last Modified: 28 May 2012 20:18
URI: http://umkeprints.umk.edu.my/id/eprint/413

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