Efficacy of pre and post emergence herbicides on bulb yield of onion ( Allium Cepa L.) in Chhattisgarh plains

Abstract

The study was conducted in order to identify the weed species in onion fields in Chhattisgarh plain. An experiment was conducted during rabi season (October-March) of 2008-2009 to find out the effect of weed management practices on growth and yield of onion, weed dynamics and economics. Onion variety “Nasik Red” was grown as a test crop and transplanted on 20th November 2008 with spacing 15x10 cm. A total of seven weed species belonging to seven family were identified in onion field that were surveyed. The maximum weed density (20.62%) was recorded with Parthenium hysterophorus followed by Cyperus rotundus (19.35%) and Cynodon dactylon (19.00%). The treatment Oxyflourfen @ 0.20 kg ha-1 pre-transplanting+ Hand Weeding at 20 DAT resulted in greater plant height, weed control and yield under Chhattisgarh plains situation.