Effect of pre- and post-emergence herbicides on crop growth, yield and profitability of greengram under western arid region of Rajasthan

Abstract

A field experiment was conducted at SKRAU Bikaner during kharif, 2022 on loamy sand soil to evaluate the effect of pre- and post-emergence herbicides on crop growth, yield and profitability of green gram [Vigna radiata (L.) Wilczek] under western arid region of Rajasthan. The experiment was designed in a randomized block design, with 10 treatments and three replications. The experiment comprises of ten treatments viz., weedy check, weed free, pendimethalin 750 g ha-1 PE, diclosulam 20 g ha-1 PE, flumioxazin 75 g ha-1 PE, pendimethalin + imazethapyr (30+2) 800 g ha-1 PE, imazethapyr 50 g ha-1 PoE, quaizalofop + imazethapyr (7.5+15) 65 g ha-1 PoE, imazethapyr + imazamox (35+35) 50 g ha-1 PoE and sodium acifluorfen + clodinafop (16.5+8) 240 g ha-1 PoE. Among all the weed management practices, weed free treatment recorded highest plant height, dry matter accumulation, number of branches and dry weight of nodules. Among different herbicides, pre-emergence application of pendimethalin + imazethapyr (30+2) 800 g ha-1 PE recorded highest growth parameters, yield attributes viz. pod plant-1, seed pod-1, test weight (g) and seed yield followed by pendimethalin 750 g ha-1 PE. pendimethalin + imazethapyr (30+2) 800 g ha-1 PE also recorded highest net returns (Rs. 54130) and B:C ratio (3.01). The minimum growth parameters, yield and yield attributes found in weedy check and diclosulam 20 g ha-1 PE.