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Effectiveness of Setoff Herbicide for Weed Control in Boro Rice

S T Hossain
BRRI Gazipur 1701

G J U Ahmed,
BRRI Gazipur 1701

MS Kabir,

ZU Ahmad

SK Khondokar

Abstract/ Executive Summary:

The study was conducted in three different sites at BRRI farm, Nogopara and Salna of Gazipur district to observe the effectiveness of SETOFF a new selective herbicide for controlling weeds in Boro rice during 1995-96. Phenotypically, this herbicide has no phytotoxic effect on rice plant. Application of SETOFF with different doses had lower the cost of production and gave comparable grain yield to two hand weeding.

Keywords: Setoff Herbicide, Weed Control, Boro Rice,

Location: BRRI, Gazipur-1701

Start Date: 01-11-1995

End Date: 30-06-1996

Program Area: Pest Management

Commodity: Chemical weed management

Objectives:

To study the efficiency of herbicide SETOFF 20 WG (Cinosulfuran), a new selective chemical was tested for controlling weeds of Boro rice

Methodology:

The experiment was conducted in the Boro (Summer rice) season, 1995-96 in three locations, i.e BRRI farm, Nogopara and Salna of Gazipur. Soils of the experimental sites were silty clay loam, pH ranged 6-7 and situated in the Chhiata series of Modhupur tract agroecological zone. The experiment was laid out in randomized complete block (RCB) design with four replications. The treatments were: (i) SETOFF 20 WG @ 100 g ha^-1, (ii) SETOFF 20 WG @ 50 g ha^-1, (iii) Hand weeding (two times) and (iv) No weeding (control). The unit plot size was 5- x 3-m and spacing, 25- x 15cm. The variety used for this experiment was BRRI dhan29. Transplanting was done in the well puddled plots in the first week of January. SETOFF 20 WG applied at 6 DAT (days after transplanting). Hand weeding was done 20 and 30 DAT. Fertilizers were applied at the rate of 80-60-40-10 kg NPKS/ha. Except nitrogen, all other fertilizers were applied during final land preparation. Nitrogen was top dressed in two equal splits i.e, at tillering and panicle initiation (PI) stages. All other management practices were done as and when necessary. Weed species in the experimental field. The predominant weed species observed during Boro season were Monochoria vaginalis, Echinochloa crusgalli, Gyperus iria, Cyperus difformis, Sphenochloea zeylanica, Finlberistylis miliacea, Saggittaira gyanensia and Scirpus maritimus. Data on plant height, weed biomass, grain and straw, yield were statistically analysed and cost of weed control for chemically and manually were taken.

Source of Information: Bangladesh Rice j. 9(1&2): 29-37, 1998

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) : 40,000/-

Achievement/Findings:

Phenotypically, this herbicide has no phytotoxic effect on rice plant. Application of SETOFF with different doses had lower the cost of production and gave comparable grain yield to two hand weeding.

Knowledge Management: Journal