Field studies were conducted to evaluate the weed competing potential of different rice cultivars at variable plant densities. Rice cultivar PR 108 exhibited greater smothering effect on weeds as compared to other cultivars. However the grain yield was higher in PR, 118. The closer spacing of 20 cm x 10 cm was found to be the most appropriate as it recorded lowest weed dry matter and high grain yield. Application of pretilachlor at 0.75 kg/ha as pre emergence application, proved to be very effective in reducing weed dry matter and increasing grain yield as compared to unweeded check.
Cultivar, Plant spacing, Pretilachlor, Transplanted rice
