The cultivated area of upland is having serious problem of weed infestation which declines the yield of upland crops. Some weeds spread fast in this region because of favourable environment in crops, forest plantation and natural forest. Weed dominated blocks namely Bakawand, Batar, Tokapal, Lohandiguda and Jagdalpur selecting 7 villages from each block of Bastar district during August-September and February-March, 2008 under national Agricultural Innovative Project. In all the blocks, Spilanthes acmella, Celosia argentia and Digitaria adscendens were the most dominant weeds in upland cropping. Among these weeds, Sphaeranthes indicus (17.65, 15.14, 22.41, 15.00 and 11.40% in Bakawand, Bastar, Tokapal, Lohandiguda and Jagdalpur, respectively) was most dominant weeds followed by Chenopodium album (14.12, 12.96, 17.14, 20.00 and 14.81% in respective blocks) and Digitaria adscendens (12.94, 12.04, 15.52, 15.00 and 7.41% in Bakawand, Bastar, Tokapal, Lohandiguda and Jagdalpur, respectively). Chromalaena odorata (20.54, 23.33, 17.93, 22.73 and 17.27 in Bakawand, Bastar, Tokapal, Lohandiguda and Jagdalpur, respectively) and Hyptis suaveolens L. (22.32, 25.36, 19.31, 25.31 and 19.09% in respective blocks) were higher in arresting relative density in respective blocks.