Inluence of combination of herbicides on mixed weed lora in Wheat (TriticumaestivumL.)

An experiment entitled “Influence of combination of herbicides on mixed weed flora in Wheat (TriticumaestivumL.)” was conducted at Birsa Agricultural University Farm, Ranchi, and Jharkhand during Rabiseason during 2021-22.The experiment was led out in randomized block design (RBD) with twelve treatments and replicated thrice with the variety DBW 187 under irrigated conditions. The treatments comprised Pendimethalin@1000g a.i/ha(PE), Pendimethalin@1500g a.i/ha(PE), Pyroxasulfone 85%WG @127.5g a.i/ha(PE), Pendimethalin@1250g a.i.(PE)+Pyroxasulfone 85%WG @127.5g a.i/ha(PE), Pyroxasulfone @ 127.5g a.i/ha + metsulfuron @ 4g a.i/ha (tank mixPE),Results revealed that application of Pyroxasulfone @ 127.5g a.i/ha + metsulfuron @ 4g a.i/ha (tank mixPE) exhibited the lowest total weed density (31.3and 47.0/m 2 ), total weed dry weight (11.3 and 31.5 g/m 2 ) and the highest weed control efficiency (80.9 and 79.1 %) at 30 and 60 days after sowingrespectively. Similarly, application of Pyroxasulfone @ 127.5g a.i/ha + metsulfuron @ 4g a.i/ha (tank mix PE) alsorecorded the highest yield attribute viz; spikes/m 2 (418), number of grains/spike (44.8), 1000 – grain weight (46.5 g), grain yield (5.81 t/ha), straw yield (6.65 t/ha) and net return (₹ 77696/ha) among herbicidal treatments.