The major weed species observed in the weedy check plots of mustard field were Chenopodium alhum, C. murale, Portulaca oleracea, Melilotus indica, Asphodelus tenuifiJ!iu.l' and Rumex dentatus. Inclusion of mungbean in mungbean-mustard cropping scquence caused 18.2% weed control efficiency over fallow-mungbean sequence. The system also gave 1597 kg ha-' seed yield of mus1ard, besides additional mustard seed equivalent yield of 600 kg ha-'. by mungbean cultivation during kharif season, which provided 24.31% higher net return over fallow-mustard cropping sequence. Net return and benefit: cost ratio were improv~d with higher seed rate (5 and 6 kg ha-') than lower seed rate (4 kg ha·'). Among the weed management practices, two hand weeding at 25 and 50 DAS and integration of fluchloralin at 0.75 kg ha" supplemented by one hand weedings at 25 DAS found significantly superior in terms of reducing weed density and dry weight of weeds over tluchloralin at 1.0 kg ha- I and weedy check. However, maximum net profit and benefit: cost ratio were recorded with fluchloralin at 0.75 kg ha-'+one hand weeding at 25 DAS.