Effect of sole or sequential application of herbicides on weeds, and productivity of Rabi Blackgram at Southern Telangana Zone

An agronomic investigation was carried out during the rabi season of 2024-25 at the College Farm, Agricultural College, Palem, Nagarkurnool district, to evaluate the performance of different herbicide options applied either singly or in sequence at pre-, early-post, and post-emergence stages in blackgram. The trial was laid out in a randomized block design with thirteen treatments and three replications. The treatments included sole applications as well as sequential use of pendimethalin 38.7% CS (677.25 g a.i. ha^-1), diclosulam 84% WDG (20 g a.i. ha^-1), pendimethalin 30% + imazethapyr 2% EC (1000 g a.i. ha^-1), fluazifop-p-butyl 11.1% + fomesafen 11.1% SL (250 g a.i. ha^-1), and propaquizafop 2.5% + imazethapyr 3.75% ME (50 + 75 g a.i. ha^-1). Among these, sequential application of pendimethalin + imazethapyr (PE) followed by either fluazifop-p-butyl + fomesafen or propaquizafop + imazethapyr (PoE) at 20-25 DAS effectively suppressed weed density and biomass, which resulted in superior seed yield.