Abstract: An experiment was conducted at the Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh during June to December 2002 to find out the effective weed control practices in terms of weed dynamics, weed control efficiency and the performance of transplanted aman rice. Fimbristylis miliacea, Scirpus murconatus and Monochoria vaginalis were found as dominant weed species in transplanted aman rice. Two times weeding was found as the best practice to keep weed infestation at minimum level and to ensure higher yield of transplanted aman rice. Other than weed free condition, the highest grain yield (5.07 t ha^-1) was produced in two hand weeding and the lowest (2.46 t ha^-1) was in unweeded condition. One hand weeding at 25 DAT along with one mechanical weeding at around 40 DAT was also found to be effective next to two hand weeding in these regards. Pre emergence herbicide Refit 500 EC was not effective to keep weed infestation at minimum level and to ensure higher yield of transplanted aman rice.