Yield and economics of summer groundnut (Arachis hypogaea L.) as influenced by weed management practices under Southern transitional zone of Karnataka

Abstract

A field experiment was conducted during the summer season of 2015 at Zonal Agricultural Research Station, University of Agricultural and Horticultural Sciences, Navile, Shivamogga, Karnataka, to assess impact of weed management practices on groundnut (Arachis hypogaea L.) productivity and to evolve efficient weed management practice. Pre-emergence application of imazethapyr @ 100 g a. i. ha-1 effectively controlled the dry matter accumulation in weed compared with weedy check, farmer’s practice, fenoxaprop-P (post-em) @ 75 g a. i. ha-1, quizalofop-P (post-em) @ 50 g a. i. ha-1, fluazifop-P (post-em) @ 100 g a. i. ha-1, chlorimuron (post-em) @ 10 g a. i. ha-1, imazaquin (post-em) @ 100 g a. i. ha-1, oxyfluorfen (pre-em) @ 100 g a. i. ha-1 and pendimethalin (pre-em) @ 1.0 kg a. i. ha-1 but at par with recommended cultural practice (two hand weedings followed by two intercultivations) and alachlor (pre-em) @ 2.0 kg a. i. ha-1. Among the weed management treatments tried weed-free check, recommended cultural practice and imazethapyr (pre-em) @ 100 g a. i. ha-1, had a pronounced effect on the yield attributes, yield and net returns as compared to unweeded crop.