Effect of Herbicides on Growth, Yield and Economics of Urdbean (Vigna mungo L.)

A field experiment with the objectives to understand the effect of herbicides on weed infestation and blackgram yield involving herbicidal treatments (weedy check, hand weeding at 20 and 40 days after sowing, Pendimethalin 1000 g/ha (Pre-em), Imazethapyr 100 g/ha at 20 DAS, Fomesafen 250 g/ha at 20 DAS, Propaquizafop 100 g/ha at 20 DAS, Pendimethalin 1000 g/ha (Pre-em) fb Imazethapyr 100 g/ha at 20 DAS, Fomesafen 210 g/ha + propaquizafop 65 g/ha at 20 DAS was undertaken in RBD with three replications at Regional Research Sub-Center NARP, Saini, CSAUAT, Kanpur during kharif season 2021. Results revealed that sequential application of Pendimethalin 1000 g/ha (Pre-em) fb Imazethapyr 100 g/ha at 20 DAS recorded lower weed density, weed dry weight, weed index and the maximum WCE, crop yield as well as net returns and B-C ratio and was at par with Fomesafen 210 g/ha + propaquizafop 65 g/ha at 20 DAS over rest of the herbicidal treatments. Therefore, it is suggested that the sequential application of herbicides may be used for effective weed management and optimal yield of blackgram.