Effect of weed management practices on yield attributes, yield and weed biomass of mungbean (Vigna radiata L.) in Vertisol of Chhattisgarh palins

A field experiment was conducted at Instructional cum Research Farm, Indira Gandhi Krishi Vishwavidyalaya, Raipur (C.G.) during kharif 2021 and 2022. The soil of the experimental field was clay (Vertisols) in texture, neutral in reaction, medium in organic carbon, low in available nitrogen, medium in available phosphorus and high in available potassium. Experiment was laid out in randomized block design with three replications, consisted of T₁-Imazethapyr 10% SL (Dose-55 a.i. g ha^-1), T₂- Fluazifop-p-butyl 13.4% w w^-1 (Dose-250 a.i. g ha^-1), T₃-Propaquizafop 2.5% w w^-1 + imazethapyr 3.75% w w^-1 ME (ready mix) (Dose-83.3 a.i. g ha^-1), T₄- Acifluorfen-sodium 16.5% EC + clodinofop-propargyl 8% EC (ready mix) (Dose-210 a.i. g ha^-1), T₅- Fomesafen 11.1% w w^-1 + fluazifop-p-butyl 11.1% w w^-1 (ready mix) (Dose-440 a.i. g ha^-1), T₆-Hand weeding twice at 20 and 40 DAS, T₇- Weed free (HW at 20, 40 and 60 DAS) and T₈- Unweeded check.

The weed flora of the experimental site was dominated with Echinocloa colona, Dinebra retroflexa, Parthenium hysterophorus, Celosia argentea, Cyperus sps. and others. Results revealed that all the yield attributing characters and yield was highest under fomesafen 11.1% w w^-1 + fluazifop-p-butyl 11.1% w w^-1 (ready mix) (Dose-440 a.i. g ha^-1) (T₅) which was at par with propaquizafop 2.5% w w^-1 + imazethapyr 3.75% w w^-1 ME (ready mix) (Dose-83.3 a.i. g ha^-1) (T₃) and acifluorfen-sodium 16.5% EC + clodinofop-propargyl 8% EC (ready mix) (Dose-210 a.i. g ha^-1) (T₄). Similarly, weed biomass was also significantly reduced in these treatments over others. However, WCE was higher in these treatments than the unweed check.