Effect of early post emergence herbicides on weed dynamics and yield of Urdbean

Abstract

A field experiment was conducted during kharif 2024-25 at the Main Agricultural Research Station, UAS, Dharwad, to evaluate the effect of early post-emergence herbicides on weed dynamics and yield of urdbean. The experimentwas laid out in a randomized complete block design (RCBD) with three replications. Nine treatments were tested,consistingof pre-emergence (PE), early post-emergence (EPoE) and post-emergence (PoE) herbicides. The experimental field wasinfested with broadleaf weeds, grasses and sedges. Among the weed control treatments, application of Propaquizafop 2.5%+ Imazethapyr 3.75% w/w ME (50 + 75 g a.i. ha-¹) RM @ 2000 g ha-¹ as EPoE proved most effective in reducing total weeddensity and dry weight, enhancing weed control efficiency and improving yield attributes (pods per plant, pod weight),seedand haulm yield. However, this treatmentwas statistically comparable with Fluazifop-p-butyl 11.1% w/w + Fomesafen11.1% w/w SL @ 250 g a.i. ha-¹ RM @ 1000 g ha-¹ as EPoE.