Author(s): P. HEISNAM, 1A. MOIRANGTHEM, N. I. SINGH, A. H. SINGH AND L. N. SINGH

Abstract: The study on the economic feasibility of some promising weedicides reveals that among the different herbicides tested T₇ {2,4-D Ethyl Ester 30 per cent EC (Champion)} was found better during earlier growth stages up to 60 DAT, producing taller plants but at later stages T₄ (Fenoxoprop-P-ethyl 6.7 % w/w EC (Rice star)) was found to be the most effective to control weed in terms of total weed biomass production (18.76 g m² fresh weight and 8.67 g m² dry weight), weed control efficiency (71.81%) and herbicide use efficiency (56.10 %). The application of weedicides T₈ {Metsulfuron Methyl 10% + Chlorimum Ethyl 10% (Almix)} helped to acieve the highest grain yield (68.98 q ha^-1 which was an increase of 20.29% over control. Treatment T8 was found to be economically feasible with the highest net return of Rs. 83121per hectare, and benefit: cost ratio of 2.21, while for control, the corresponding values were accounted to be Rs.45, 599 per hectare and 1.22 respectively. This was closely followed by the application of Pyrazo Sulfuron 50% EC (Saathi) @50g a.i. ha^-1 as early Post-emergence in terms of grain yield and economic parameters.

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