EFFICACY OF SOME PROMISING WEEDICIDES ON SHALLOWLAND TRANSPLANTED RICE (ORYZA SATIVA L.) UNDER RAINFED CONDITIONS

Abstract

An experiment was conducted at the Research Farm, College of Agriculture, Central Agricultural University,Imphal to study the efficacy of a 10 promising weedicides viz. Swat (Paraquat Dichloride 24% SL), Sunrice (Ethoxysulfuron 15% WDG), Topstar (Oxadiargyl 80% WP), Rice star (Fenoxoprop-P-ethyl 6.7% w/w EC), Sofit (Pretilachlor 30.7% w/w EC), Whipsuper (Fenoxoprop-P-ethyl 9.3% w/w), Champion (2,4-D Ethyl Ester 30% EC), Almix (Metsulfuron Methyl 10% + Chlorimum Ethyl 10%), Saathi (PyrazoSulfuron 50% EC) and Rifit (Pretilachlor 50% EC) under 11 treatments (including control treatment) in Randomized Block Design with 3 replications. Among the different herbicides tested T7 {2,4-D Ethyl Ester 30% EC (Champion)} was found better, during earlier growth stages upto 60 DAT, producing taller plants but at later stages T4 {Fenoxoprop-P-ethyl 6.7 % w/w EC (Rice star)} was found most effective to control weed least total weed biomass production (18.76g/m2 fresh weight and 8.67g/m2 dry weight), weed control efficiency (71.81%) and herbicide use efficiency (56.10 %). Different yield attributes viz. number of effective tillers per hill, number of spikelets, filled grains were recorded the highest with the application of {Metsulfuron Methyl 10% + Chlorimum Ethyl 10% (Almix)} weedicide T8 resulting to the highest grain yield (68.98 q/ha) increasing 20.29 % over control.