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Efficacy of Herbicides on the Yield of Lentil (lens Culinaris Medik.)

Shamima Aktar
Pulse Research Centre, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh

M. A. Hossain
Pulse Research Centre, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh

A. Siddika
Pulse Research Centre, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh

Nazmun Naher
Pulse Research Centre, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh

M. R. Amin
On-Farm Research Division, Bangladesh Agricultural Research Institute (BARI), Gazipur-1701, Bangladesh

Abstract/ Executive Summary:

A field experiment was conducted at Bangladesh Agricultural Research Institute, Gazipur during rabi (winter) season of 2008-09 to observe the efficacy of two herbicides on the yield of lentil (BARI masur-5). Paraxon, Whipsuper, Ronstar and Topstar were the herbicidal treatments applied after sowing of seeds and two leaf stage of weeds according to their mode of action. Dry weight of weed samples were recorded at 25 DAS and 40 DAS. The dry weight of weeds was found to be maximum in unweeded control. The highest yield of lentil 1086.6 kg ha^-1was observed when Whipsuper was applied while the control treatment showed the lowest yield (626.7 kg ha^-1). A negative correlation existed between the weed dry matter weights and seed yield of lentil.

Keywords: Herbicide, Efficacy, Yield, Lentil

Location: Central Research Farm, Bangladesh Agricultural Research Institute, Gazipur

Start Date: 00-00-2008

End Date: 00-00-2009

Program Area: Pest Management

Commodity: Herbicide

Objectives:

To find out the suitable herbicide(s) for controlling weeds in lentil by pre or post-sowing application without minimizing seed yield.

Methodology:

The field experiment was conducted at Central Research Farm of Bangladesh Agricultural Research Institute, Gazipur during rabi (winter) season of 2008-2009. The experiment was laid out in a Randomized Complete Block design with three replications. The trial consisted of four weedicides such as Paraxon (Paraquat dichloride), Whipsuper (9% Phenoxaprop-PEthyl), Ronstar (40% Oxadiazon) and Topstar (40% Oxadiargyl) with one unweeded control (no herbicide and weeding) as treatments. The unit plot size was 5 m×4 m. The seeds of BARI Masur-5 were sown at 30 cm apart in continuous seeding technique. Seeds were sown on 27 October, 2008 at a rate of 30 kg ha^-1. The land was fertilized with 40-170-55 kg ha^-1 of N-P₂O₅-K₂O in the form of urea, triple super phosphate and muriate of potash, respectively. All the fertilizers were applied as basal during the final land preparation. Paraxon (1.5 ml L^-1 water), a non-selective herbicide was applied at moist condition of soil after sowing to control different grasses and broad-leaf weeds. Whipsuper (1.13 ml L^-1 water) was sprayed after emergence of two leaf stage of weeds, Ronstar (3 ml L^-1 water) was sprayed immediately after sowing of seeds, Topstar (1 ml L^-1water) was applied at moist condition of soil after sowing. Two irrigation were applied, one at immediately after seed sowing and another at the vegetative stage (45 DAS) of crop. Intercultural operations such as mulching, thinning, applying insecticide were performed as and when required. Weed species grown at two leaf stage in each experimental plot were identified. Weed samples were taken at 25 and 40 days after sowing (DAS) from 1m²in each plot using quadrate and dry weights were recorded. The crop was harvested on 8 March, 2009. Yield components and seed yield of lentil were recorded and analyzed statistically by using MSTAT program. The treatment means were compared using LSD at 5% level of significance.

Source of Information: The Agriculturists 11(1): 89-94 (2013) ISSN 2304-7321 (Online), ISSN 1729-5211 (Print), A Scientific Journal of Krishi Foundation Indexed Journal

Article Link (Online Journal): http://banglajol.info/index.php/AGRIC/article/view/15248/10811

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Weed infestation is one of the limiting factors in achieving optimum yield of lentil. The extent of yield reduction depends upon time, duration and intensity of weed infestation and weed competition with crops for growth resources. Application of herbicide can minimize weed infestation if the field can be kept weed free during the critical growth period. Application of Whipsuper seems to be better in controlling weeds in comparison with other herbicides.

Knowledge Management: Journal