Effect of Different Pre and Post Emergence Herbicides on Growth, Yield and Weed Indices in Urdbean Crop under Sub-tropical Conditions of Jammu

A field study was conducted at Sher-e-Kashmir University of Agricultural Sciences and Technology of Jammu during summer seasons of 2015 and 2016 to study the effect of pre and post-emergence application of herbicides on growth, yield and weed indices in urdbean crop. The results revealed that the application of Imazethapyr + pendimethalin (RM) @ 1000 g/ha as pre-emergence significantly increased the growth parameters i.e. plant height, dry matter accumulation, leaf area index and crop growth rate of summer urdbean which was however statistically at par with Imazethapyr + imazamox (RM) @ 80 g/ha at 3-4 leaf stage), Imazethapyr @ 80 g/ha at 3-4 leaf stage, Imazethapyr + imazamox (RM) @ 70 g/ha at 3-4 leaf stage and Imazethapyr @ 70 g/ha at 3-4 leaf stage. Further, among the herbicidal treatment, imazethapyr + pendimethalin @ 1000 g/ha as pre-emergence and imazethapyr + imazamox 80 g/ha as post-emergence significantly reduced the weed density and weed biomass. The highest seed and stover yield of urdbean crop was recorded with pre emergence application of imazethapyr + pendimethalin @ 1000 g/ha coupled with highest net returns (Rs. 45205/ha and Rs. 41364/ha) and B: C ratio (2.56 and 2.29).