Abstract
A field experiment was conducted at Agricultural Research Farm, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, UP, India during kharif-2017 and 2018 to evaluate effect of herbicides on weed population and weed dry weight in transplanted rice in eastern UP. There were ten treatments in the combination of herbicides in varying doses, arranged in a randomized block design with three replications. Among dominant weed flora narrow leaf weeds like Cynodon dactylon, Echinochloa colona and Echinochloa crusgalli, sedges like Cyperus rotundus, Cyperus iria and Fimbristylis miliacea and broad-leaved weeds like Eclipta alba and Caesulia axillaris were recorded in the time of experimentation. Combined application of Bispyribac-Na 9.1% @ 24.57 g ha-1 + Metsulfuran methyl 1.2% @ 3.24 g ha-1 + Chlorimuron ethyl 1.2% SC @ 3.24 g ha-1 was recorded minimum weeds density and weeds dry weight and maximum weed control efficiency after weed free treatment at all the crop growth stage 30, 60 and 90 days after transplanting.
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