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Effect of Pre-and Post- Emergence Herbicides on the Yield of Transplant Aman Rice

S.S. Islam
Alhaj Shafiuddin Ahmed Karigori Mohabiddalaya, Boda Panchagar

A.S.M. Ahsanullah
M.S. student, Dept. of Agronomy, HSTU, Dinajpur

A.S.M. Amanullah
Bangladesh Sugarcane Research Institute (BSRI) Ishurdi, Pabna

S. Parvin
Dept. of Finance and Banking, HSTU, Dinajpur

M.H.A. Amin
Dept. of Agroforestry, HSTU, Dinajpur

Abstract/ Executive Summary:

An experiment was conducted at the Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh during the period from July to December, 2006 to find out the effect of pre- and post- emergence herbicides on weed control and the performance of different varieties of transplant aman rice. The experiment was laid out in a randomized complete block design with three replications. Three varieties such as BRRI dhan40, BRRI dhan41 and Nizersial were included in the experiment. There were four treatments viz. control, two pre-emergence herrbicides - Ronstar 25 EC @ 2.0 L ha^-1, Rifit 500 EC @ 1.0 L ha^-1and one post emergence herbicide, Sunrise 150 WG @ 100 g ha^-1. Pre-emergence herbicide Rifit 500 EC showed the best performance in reducing weed density and comparatively better grain yield. As a result, net income was also increased. The highest grain yield (3.61 t ha^-1) was obtained from Rifit 500 EC. BRRI dhan41 gave the highest grain yield (4.43 t ha^-1) with Rifit 25 EC @ 1.0 L ha^-1.

Keywords: Pre-and post-emergence herbicides, Yield, Transplant aman rice

Location: Agronomy Field Laboratory, Bangladesh Agricultural University, Mymensingh

Start Date: 00-07-2006

End Date: 00-12-2006

Program Area: Pest Management

Commodity: Rice

Objectives:

1. To evaluate the weed control efficiency of Ronstar 25 EC, Rifit 500 EC and sunrise 150 WG in transplant aman rice, 2. To asses the effect of herbicides on growth and yield of transplant aman rice, and 3. To evaluate the economic performances of different herbicides.

Methodology:

The experiment was carried out at the Agronomy Field Laboratory, Bangladesh Agricultural University, and Mymensingh during the period from June to December 2006. The site belongs to the Old Brahmaputra Floodplain (AEZ-9) having non-calcareous dark grey flood plain soil. The land was medium high with sandy loam texture. The pH value of the soil ranges 6.8. Experimental treatments are factor A: 3 cultivar viz. V₁= BRRI dhan40, V₂= BRRI dhan41, V₃= Nizersail and factor B: 4 herbicidal treatment viz. P₀= No weeding, P₁= Ronstar 25 EC @ 2.0 L ha^-1, P₂= Rifit 500 EC @ 1.0 L ha^-1, P₃= Sunrice 150 WG @ 100 g ha^-1. The experiment was laid out in a randomized complete block design (RCBD) with three replications. The size of unit plot was 4 m x 2.5 m. The unit plot was separated from each other by a space of 0.5 m block distance was 1.0 m. Seeds of different treatments were sown in nursery bed on 29 July 2006. The land was thoroughly ploughed on 25 August 2006 with a tractor driven disc plough followed by harrowing. Then it was puddle with a power tiller and finally puddle with country plough followed by laddering in order to level the soil. Weeds and stubbles were removed from the field. The plots used for seedling plantation were fertilized with whole amount of triple super phosphate, muriate of potash, gypsum and zinc sulphate @ 67, 60, 34 and 5 kg ha^-1 respectively. Urea was top dressed in three equal installments. The first installment was applied at 15 days after transplanting (DAT), the second one at active tillering stage at 30 DAT and third one at panicle initiation stage at 20 DAT. Seedlings were uprooted carefully from the nursery bed and were transplanted in the main plots on 28 August 2006. During the growth period, some plants were attacked by stem borer (Scirpophaga incertulus). The pest was controlled by Furadan-5G that was applied at the active tillering stage @ 10 kg ha^-1. Five hills (excluding border hill) from each lot were randomly selected, uprooted, and properly tagged before harvesting for recording necessary data. Maturity of crops was determined when 90% of the seeds became golden yellow in color. The crop was harvested at full maturity on 24 November, 2006 and the yields of both grain and straw were recorded after thoroughly drying them in the sun harvesting was done lot-wise and samples were tagged for further processing, after harvest, grains were threshed, cleaned and sun dried to record the grain yield plot^-1 grain yield was adjusted to 14% moisture content. Straw was also sun dried to record the straw yield plot^-1 grain and straw yields plot^-1 was converted to t ha^-1. Data were collected on the plant height (cm), number of total tillers hill^-1, number of non effective tillers hill^-1, Number of effective tillers hill^-1, panicle length (cm), number of filled grains panicle^-1, number of unfilled grains panicle^-1, weight of 1000 grains (s), grain yield (t ha^-1), straw yield (t ha^-1) and harvest index (%). The collected data were statistically analyzed following the analysis of variance technique and the mean differences were adjudged by the Duncan’s Multiple Rage Test using a statistical computer package MSTAT.

Source of Information: BANGLADESH RESEARCH PUBLICATIONS JOURNAL; ISSN: 1998-2003, Volume: 3, Issue: 4, Page: 1242-1252, March-April, 2010

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Pre-emergence herbicide Rifit 500 EC showed the best performance in reducing weed density and comparatively better grain yield. As a result, net income was also increased. The highest grain yield (3.61 t ha^-1) was obtained from Rifit 500 EC. BRRI dhan41 gave the highest grain yield (4.43 t ha^-1) with Rifit 25 EC @ 1.0 L ha^-1.

Knowledge Management: Journal