A field experiment was conducted during rabi seasons of 2007-08 and 2008-09 at the research farm of NRCSS, Ajmer (Rajasthan) to find out most suitable and economical method of weed control in fennel (Foeniculum vulgare).The experiment was laid in RBD. Based on two years’ study, it was revealed that besides weed free treatment, significantly highest plant height at all the growth stages, number of branches/plant, yield attributes like number of umbels/plant, number of umbellates/umbel, number of seeds/umbellate, seed and straw yields of fennel were recorded with pre-emergence (PRE) application of oxadiargyl @ 75 g /ha+one hand weeding (HW) at 45 DAS which being at par with PRE application of pendimethalin @ 1.0 kg/ha+HW at 45 DAS. Similarly, besides weed free treatment, the lowest dry weight of weed at harvest and weed index as well as highest weed control efficiency was also obtained with PRE application of oxadiargyl @ 75 g/ha (PE)+HW at 45 DAS. This treatment also exhibited highest net returns (Rs.104310/ha) and B : C ratio.