Vol. 8, Issue 5 (2020)
Comparative evaluation of herbicides for weed management in Lathyrus under new alluvial zone of West Bengal
Author(s): Biplab Biswas, Bishal Mukherjee, Manish Kumar Naskar, Jit Sankar Basak and PS Bera
Abstract: A field experiment was carried out at the District Seed Farm, A-B Block, Kalyani, Bidhan Chandra Krishi Viswavidyalaya, Nadia, West Bengal during winter season of 2017-18 with Lathyrus variety Bidhan Khesari 1 (BK-14-2) to analyze the effect of different herbicide combinations and weed management options in controlling the weeds as well as ensuring the growth and yield of grasspea. The experiment was laid out in randomized block design with 11 treatment combinations which were as follows: T1 = Pendimethalin 30 EC (1 kg ha-1) Pre-emergence + One hand weeding at 30 DAS, T2 = Pendimethalin 38.7 CS (1 kg ha-1) Pre-emergence, T3 = Pendimethalin 38.7 CS (1 kg ha-1) Pre-emergence + One hoeing at 30 DAS, T4 = Sulfentrazone 39.6 EC (50 g lit-1) Pre-emergence + One hoeing at 30 DAS, T5 = Fenoxyprop-ethyl 9.3% W/W (60 g ha-1) Post-emergence at 30 DAS, T6 = Pendimethalin 30 EC + Imazethapyr 2% (Ready mix 1.0 kg ha-1) Pre-emergence, T7 = Pendimethalin 30 EC + Imazethapyr 2% (Ready mix 1.0 kg ha-1) Pre-emergence + One hoeing at 30 DAS, T8 = Pendimethalin 38.7 CS + Imazethapyr 2% (Tank mix 1 kg ha-1) Pre-emergence, T9 = One hoeing at 30 DAS, T10 = Weed free (Two hoeing at 30 & 45 DAS) and T11 = Weedy check. All the treatment combinations in the experiment were replicated thrice. The result of the experiment revealed that highest plant biomass (51.18, 193.63 and 253.95 g) and LAI (0.95, 1.96 and 1.64) at 30, 60 and 90 DAS was observed in T7 treatment among all others. The T7 treatment gave the maximum number of seeds pod-1 (5) and highest seed yield (903.71 kg ha-1) in grasspea in the investigation. The lowest value of total weed population (38.01, 51.33 and 72.66) and lowest weed dry mass (17.19, 46.41 and 74.25) at 30, 60 and 90 DAS was also recorded in T7 treatment. Thus, application of Pendimethalin 30 EC + Imazethapyr 2% (Ready mix 1.0 kg ha-1) Pre-emergence + One hoeing at 30 DAS were found more effective in reducing weed population and dry mass of weeds and producing better seed yield of Lathyrus in this zone.
DOI: 10.22271/chemi.2020.v8.i5e.10320
Pages: 349-352 | 932 Views 199 Downloads
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How to cite this article:
Biplab Biswas, Bishal Mukherjee, Manish Kumar Naskar, Jit Sankar Basak, PS Bera. Comparative evaluation of herbicides for weed management in Lathyrus under new alluvial zone of West Bengal. Int J Chem Stud 2020;8(5):349-352. DOI: 10.22271/chemi.2020.v8.i5e.10320
