Efficacy of bensulfuron methyl plus pretilachlor against complex weed flora in transplanted kharif rice (Oryza sativa L.)
Tiryak Kumar Samant
The improved practice with pre emergence application of bensulfuron methyl at 60g /ha + Pretilachlor at 600 g/ha at 3 DAT recorded weed dry weight (7.27, 19.69, 27.47 g m-2) and the weed control efficiency (73.13, 33.61 & 43.92 %) at 30, 60 & 90 DAT respectively, which were higher than farmers practices of one hand weeding. The improved technology also produced grain yield (48.63 q ha-1) which was 19.7% higher than local check with harvest index, Effectivity of tillers, spikelet fertility 46.5, 79.4 and 92.7 % respectively. The same also recorded higher gross return of Rs. 77024.98 ha-1 with a benefit cost ratio of 1.90 and additional net return of Rs.11321.08 ha-1 as compared to local check. Thus, pre-emergence application of bensulfuron methyl 60g /ha + pretilachlor 600 g/ha at 3 DAT was very effective in reducing the weed biomass in transplanting rice with higher grain yield and net realization.