From this study it could be concluded that the critical period of weed – sugar beet competition was 2-12 weeks after emergence, which, should be need weed control during this period and left sugar beet plant free from weeds by using hand hoeing twice or thrice or by spraying with herbicides such as Harness followed by Safari or Safari followed by Select Super these treatments can be reduce weed biomass in sugar beet fields during the first stage of sugar beet plant until the end of critical period for weed competition and reduced yield losses of sugar beet.