Efficacy of herbicides on yield and economic viability of Chia (Salvia hispanica L.) in Western Rajasthan

Abstract

The current field experiment was conducted at research farm of Agricultural Research Station, Mandor, Agriculture University, Jodhpur, Rajasthan during Rabi season of 2021-22 to find out the efficacy of different herbicides on chia (Salvia hispanica L.) under western Rajasthan. Application of post-emergence herbicides resulted in more seed yield of chia than application of pre-emergence herbicides and weedy check. Postemergence herbicides, bentazon 48% SL 750 g/ha recorded significantly higher seed yield followed by application of bentazon 48% SL 500 g/ha, sulfentrazon 39.6% SC 75g/ha and pendimethalin 38.7% CS 400 g/ha. Significantly higher straw yield of chia was obtained with the application of bentazon 48% SL 750 g/ha which was statistically at par with bentazon 48% SL 500 g/ha, fluazifop–p-butyl 11.1% SL 200 g/ha, sulfentrazon 39.6% SC 75 g/ha and sulfentrazon 39.6% SC 75 g/ha. The maximum increase by 61.4 per cent was recorded by weed free followed by bentazon 48% SL 750 g/ha (47.5%), bentazon 48% SL 500 g/ha (42.7%), sulfentrazon 39.6% SC 75g/ha (39.0%) and pendimethalin 38.7% CS 400 g/ha (37.6%). Among all the herbicides treatments, the significantly higher net returns and B:C ratio of chia was recorded with bentazon 48% SL 750 g/ha.