A field experiment was conducted during rainy season of 2015 and 2016 at the Research Farm, Institute of Agricultural Sciences, BHU, Varanasi in sandy clay loam soil to find out the influence of date of sowing (D 1 -11 June, D 2 -25 June and D 3 -9 July) and weed management practices (W 1 -Weedy check, W 2 -Pendimethalin @ 1.0 kg a.i. ha -1 (preemergence) fb one hand weeding at 25 DAS, W 3 -Pendimethalin @ 1.0 kg a.i. ha -1 fb Imazethapyr @ 100 g a.i. ha -1 (post-emergence), W 4 -Pendimethalin

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... 1.0 kg a.i. ha -1 fb Imazethapyr @ 100 g a.i. ha -1 fb one hand weeding at 50 DAS, W 5 -Imazethapyr @ 100 g a.i. ha -1 fb one hand weeding at 50 DAS, W 6 -Two hand weedings at 25 and 50 DAS) in pigeonpea. Results revealed that density and biomass of weeds increased with delay in sowing time from 11 June to 9 July. Eventually, minimum weed loss of 13.42 % and 12.68 % was observed with D 1 -11 June. Among weed management practices, minimum values of number of weeds and their dry weight m -2 which was significantly lower than other weed management practices were recorded with two hand weeding at 25 and 50 DAS which is at par with Pendimethalin @ 1.0 kg a.i. ha -1 fb Imazethapyr @ 100 g a.i. ha -1 at 25 DAS fb one hand weeding at 50 DAS during both the years of experimentation. Minimum weed loss of 2.89 % and 2.41 % was observed with was recorded with W 4 . Yield, Gross returns and Net returns, B: C ratio of pigeonpea were superior when crop was sown on 11 June compared to delay in sowings during both the years. Among weed control treatments, two hand weeding at 25 and 50 DAS which is at par with Pendimethalin @ 1.0 kg a.i. ha -1 fb Imazethapyr @ 100 g a.i. ha -1 at 25 DAS fb one hand weeding at 50 DAS with respect to Yield, Gross returns and Net returns but higher B: C ratio was recorded with Pendimethalin @ 1.0 kg a.i. ha -1 fb Imazethapyr @ 100 g a.i. ha -1 at 25 DAS K e y w o r d s