Effect of pre and post emergence application of herbicides on weed control efficiency, performance ofsunflower (Helianthus annuus L.) and succeeding chickpea crop(Cicer arietinum L.)

VIDYAVATI S  HAKKE; N.  ANANDA; B. M.  CHITTAPUR; M. R.  UMESH; S. N.  BHAT

VIDYAVATI S HAKKE Department of Agronomy, College of AgricultureUniversity of Agricultural Sciences, Raichur - 584 104, Karnataka, India
N. ANANDA Department of Agronomy, College of AgricultureUniversity of Agricultural Sciences, Raichur - 584 104, Karnataka, India
B. M. CHITTAPUR Department of Agronomy, College of AgricultureUniversity of Agricultural Sciences, Raichur - 584 104, Karnataka, India
M. R. UMESH Department of Agronomy, College of AgricultureUniversity of Agricultural Sciences, Raichur - 584 104, Karnataka, India
S. N. BHAT Department of Agronomy, College of AgricultureUniversity of Agricultural Sciences, Raichur - 584 104, Karnataka, India

Keywords: Chickpea, Pendimethalin, Propaquizafop, Sunflower, Weed index

Abstract

A field experiment was conducted during kharif, 2017 on medium black soil at the Main Agricultural ResearchStation, UAS Raichur. The experiment consisted of eleven treatments laid out in Randomized Block Design. Among thedifferent weed management practices, pre-emergent application of pendimethalin 38.7 CS @ 0.75 kg a.i ha-1 followed bypost emergent application of propaquizafop 10 EC @ 62 g a.i ha-1at 15 - 20 DAS was found effective to manage weeds andgrain yield comparable with weed free condition. It also recorded lower grasses, sedges, broad leaf weeds and total weedscount, dry weight of weeds (2.25 g m-2) lower weed index (4.50) and higher weeds control efficiency (95.65 %) at 30 DASwhen compared to weedy check. Extent of yield reduction due to weed infestation was 52.8% over weed free. There wereno phyto-toxicity symptoms was not observed both on sunflower and succeeding chickpea crop