eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2017-03-25 14 1 453 460 10.13005/bbra/2464 21768 article Raj Kumar 1 A. K. Bhatia 1 Davinder Singh 1 Department of Vegetable Science College of Agriculture Ccs Haryana Agricultural University, Hisar-125004. The experiment was conducted during Rabi season of 2013-14 to study the efficacy of different herbicides alone and their combination to control weeds in potato crop. Among the different herbicides studied pre-emergence application of atrazine @250 g/ha alone have been found more efficient in controlling  both monocot and dicot weeds with higher weed control efficiency (99.1%) as  compared to atrazine @125 g/ha with metribuzin@175 g/ha as pre-emergence and with paraquat@35 g/ha as post-emergence. The maximum potato yield, nutrient uptake by potato crop and minimum nutrient uptake by weeds was recorded in weed free (425.8q/ha) while pre-emergence application of atrazine @250 g/ha gave higher significant results followed by pendimethalin@1000g/ha as pre-emergence. However, maximum nutrient uptake by weeds was recorded with weedy check. The highest benefit: cost ratio was noticed in atrazine @250 g/ha pre-emergence (2.72) compared to other herbicides and conventional weed management practices. https://www.biotech-asia.org/vol14no1/efficiency-of-different-herbicides-alone-and-their-combination-with-optimum-time-of-application-to-control-weeds-in-potato-solanum-tuberosum-l-in-haryana/ Efficacy;  Herbicide; Potato Weed;Yield;