Effect of Diclosulam pre-emergence herbicide on weed dynamics,yield and economics of groundnut (Arachis hypogaea L.)

Abstract

A field experiment was conducted to study the effect of different high efficiency herbicides as pre- and post-emergence application on weed growth and yield of groundnut at AICRP on Groundnut, Main Agricultural ResearchStation, University of Agricultural Sciences, Dharwad, Karnataka during kharif 2020. Among all the weed managementpractices, the broad-spectrum weed control with higher pod yield (2866 kg ha-1), net returns (`55156 ha-1) and benefit-costratio ( 2.11 ) were obtained with diclosulam 84 % WDG @ 25 g a.i. ha-1 (PE) + Imazethapyr 10 % SL @ 100 g a.i. ha-1 (PoE)at 18-20 DAS and next best option was diclosulam 84 % WDG @ 20 g a.i.ha-1 (PE) + Imazethapyr 10 % S @ 100 g a.i. ha-1 (PoE)at 18-20 DAS,.The phytoxicity rating of 1.0 was recorded wth diclosulam 84 % WDG @ 25 g a.i. ha-1 (PE) at10 days aftersowing and there after it decreased and reached zero at 20 DAS.