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Validation of Integrated Weed Control Option for Increasing Boro Rice Yield at Farmers' Field

M.I.M. Akhand
SSO
Agronomy Division, BRRI, Gazipur-1701

Md. Abu Bakar Siddique Sarker
PSO
Agronomy Division, BRRI, Gazipur-1701

M.M. Mahbub
SO
Agronomy Division, BRRI, Gazipur-1701

Abstract/ Executive Summary:

Nolchiti, Jhalokathi: Results indicated that the highest panicle number/m² was observed in post-emergence herbicide + one hand weeding treatment. The panicle number/m² varied significantly among the treatments. The grains/panicle did not vary significantly among the treatments. The grains/panicle was found maximum at post-emergence herbicide + one hand weeding and minimum was found at farmer’s practice plots. Farmer’s practice showed the highest percentage of sterility which is significant to post-emergence herbicide + one hand weeding. The variation of grain yield among the treatments was statistically significant, where 21% higher grain yield was found in post-emergence herbicide + one hand weeding treatment over farmer’s practice plot. Betagi, Barguna: Results indicated that the highest panicle number/m² was observed in hand weeding treatment. The panicle number/m² varied significantly among the treatments. The grains/panicle also varies significantly among the treatments. The grains/panicle was found maximum at hand weeding and minimum was found at farmer’s practice plots. Farmer’s practice showed the highest percentage of sterility. The variation of grain yield among the treatments was statistically significant, where 9% higher grain yield was found in hand weeding treatment over farmer’s practice plots

Keywords: BRRI dhan47, Pre emargence, Post emargence, Integrated weed control.

Location: Nolchiti, Jhalokathi and Betagi, Barguna

Start Date:

End Date:

Program Area: Pest Management

Commodity: Rice

Objectives:

The experiment was conducted at Nolchiti, Jhalokathi and Betagi, Barguna to determine the weed control methods for growing rice in Boro season.

Methodology:

The treatments were; i) Pre-emergence herbicide + one hand weeding, ii) Post-emergence herbicide + one hand weeding and iii) Pre-emergence herbicide + post-emergence herbicide, iv) Three hand weeding at 15, 30 and 45 DAT and v) Farmer’s practice. The experimental area was laid out in design RCB with three replications. Thirty-nine-day-old seedlings of BRRI dhan47 was transplanted at 20 cm × 20 cm spacing. The unit plot size was 5 × 4 m². The pre-emergence herbicide: Butachlor@25 kg/ha applied at 4 DAT (days after transplanting) and post-emergence herbicide: Pyrazosulfuran ethyl@150 g/ha applied at 8 DAT. BRRI Recommended fertilizer doses were; Urea @284 kg ha^-1, TSP 82 kg ha^-1, MOP 82 kg ha^-1, Gypsum 63 kg ha^-1, ZnSO₄ 7 kg ha^-1. The full dose of TSP, MOP, Gypsum and ZnSO₄ were applied during final land preparation. Urea was top dressed at 20 & 40 DAT. Irrigation water, insect and weed control were done as and when necessary. Data on panicle number/m², grains/panicle, sterility (%) and grain yield were recorded at harvest.

Source of Information: BRRI annual Review Report, 2013-2014

Article Link (Online Journal):

Funding Source:

1.	Budget: 50000.00

Total Budget (Tk.) : 50000.00

Achievement/Findings:

In the farmer’s field of post emergence herbicide and hand weeding produced statistically higher grain yield compared to farmers practiced plots.

Knowledge Management: Report/Proceedings