Abstract

A field experiment was conducted to evaluate the impact off different herbicides on transplanted basmati rice in Typic Haplustept soils of Punjab during kharif season of 2015–16. The predominant weed species observed in experimental farm were Echinochloa crusgalli, Cynodon dactylon, Cyperus rotundus, Cyperus difformis and Eclipta alba. The results showed that the grasses were the predominant weed species followed by broadleaf weeds and sedges. Significantly lower weed density (7.3/m2) and weed dry weight/m2 (5.4 g) were recorded in hand weeded plot which remained at par with pre-emergence herbicide bensulfuron methyl @ 55 g a. i./ha. The highest weed control efficiency (97%) was obtained with hand weeding followed by bispyribac sodium 10 SC @ 30 g a. i./ha (93.8%). The maximum plant height (143.9cm), number of tillers per plant (34.6), number of panicles per plant (48.3), number of filled grains per panicle (114.3), 1000-grain weight (32 g), grain yield (5964 kg/ha), straw yield (6327 kg/ha) and harvest index (20.4%) were recorded in HW plots followed by bensulfuron methyl @ 55 g a. i./ha with plant height (114.9 cm), number of tillers/plant (32.6), number of panicles/plant (46), number of filled grains per panicle (103.6), 1000-grain weight (29.2 g), grain yield (5714 kg/ha), straw yield (6280 kg/ha) and harvest index (18.4%).