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Economic Weed Management Options in Winter Rice

Md. Abdullah Al Mamun,
Former SSO,
Agronomy Division, BRRI, Gazipur.

A Mazid
Former CSO & Head
Agronomy Division, BRRI, Gazipur.

M A J Mridha
CSO & Head
Agronomy Division, BRRI, Gazipur.

Rakiba Shultana
SSO
Agronomy Division, BRRI, Gazipur.

M. K. A. Bhuiyan
SSO
Agronomy Division, BRRI, Gazipur.

Abstract/ Executive Summary:

An experiment was carried out to find out an effective and economic herbicide to control weeds in Bangladesh Rice Research Institute, Gazipur, during Boro season. Weed control treatments were three rates of Becolor 5G (butachlor), Bouncer 10WP (pyrazosulfuron ethyl) and Becofit 500EC (Pretilachlor). Paspalum distichum was the dominating weed species in the experimental site. Weed control efficiency ranged (WCE) from 42 to 84%. Above 80% WCE was obtained by Becolor 5G @ 30 kg ha^-1, Bouncer 10WP @ 150g ha^-1 and Becofit 500EC @ 1.20 L ha^-1, respectively. The highest grain yield (6.96 t ha^-1) was obtained from Surjamoni when treated with Bouncer 10WP @ 150g ha^-1 which was 49% higher than control. BRRI dhan29 produced also the highest grain yield when treated with same treatment which was 37% higher than control. In terms of profitability of rice production, application of Bouncer 10WP @ 150g ha^-1 gave highest gross return and gross margin than other weed control treatments. The highest benefit cost ratio (BCR) of Bouncer 10WP @ 150g ha^-1 suggested that it could be an alternative weed control option for profitable rice production.

Keywords: Economics, Weed management, Herbicides, Winter rice, Weed control

Location: BRRI Gazipur and Rangpur

Start Date:

End Date:

Program Area: Pest Management

Commodity: Rice

Objectives:

To find out an effective and economic herbicide to control weeds in transplanted rice

Methodology:

An experiment was carried out to find out an effective and economic herbicide to control weeds in Bangladesh Rice Research Institute, Gazipur, during Boro season. Weed control treatments were three rates of Becolor 5G (butachlor), Bouncer 10WP (pyrazosulfuron ethyl) and Becofit 500EC (Pretilachlor). Visual observation indicates that these herbicides were not toxic to rice plants. The experiment was laid out in a Randomized complete block design (RCBD). Net plot size was 4m x 4m. Fertilizers such as nitrogen, phosphorus and potassium (N, P, and K) and sulphur (S) were applied at 120, 20, 50 and 10 kg/ha, respectively. The whole phosphorus and potassium and one third of nitrogen were applied at the time of sowing. The remaining doses of nitrogen were applied in two splits at tillering and panicle initiation, respectively. The crop was harvested at maturity. The data were analyzed following analysis of variance (ANOVA) and the statistical program MSTAT-C.

Source of Information: Pak. J. Weed Sci. Res. 17(4):323-331, 2011

Article Link (Online Journal):

Funding Source:

1. Government

Budget: Thirty thousand taka

Total Budget (Tk.) : Thirty thousand taka

Achievement/Findings:

Herbicide could be an alternative cost effective weed control approach. Bouncer 10WP @ 150g ha^-1could be applied to increase weed control efficiency and profitable rice production in Boro season.

Knowledge Management: Journal