A field experiment on weed dynamics, productivity and profitability of green chilli as influenced by different weed control measures was conducted in two consecutive rabi seasons of 2012 and 2013 in a randomized complete block design with ten treatments [Propaquizafop 10% EC PoE (postemergence) @ 500 ml ha-1 (50 g a.i.), Propaquizafop 10% EC PoE @ 625 ml ha-1 (62.5 g a.i.), Propaquizafop 10% EC PoE @ 750 ml ha-1 (75 g a.i.), Propaquizafop 10% EC PoE @ 1250 ml ha-1 (125 g a.i.), Pendimethalin 30% EC PRE (preemergence) @ 4160 ml ha-1 (1250 g a.i.), Pendimethalin 30% EC PRE @ 4160 ml ha-1 (1250 g a.i.) -1 IC at 30 DAT, Propaquizafop 10% EC PoE @ 625 ml ha-1 (62.5 g a.i.) fb (followed by) 1 intercultivation at 30 DAT, Pendimethalin 30% EC PRE @ 4160 ml ha-1 (1250 g a.i.) fb 10% EC PoE @ 625 ml ha-1 (62.5 g a.i.) at 2-7 leaf stage, weedy check and control (Hand weeding)] at Raichur in Hyderabad Karnataka region. The predominant weed flora were Dinebra retroflexa, Panicum flavidum, Panicum javanicum, Brachiaria reptans, Cynondon dactylon among monocots; Cyperus rotundus among sedge and Trianthema portulacastrum, Digeria aravensis, Amaranthus polygamus, Amaranthus viridis, Parthenium hysterophorus, Euphorbia hirta, Phyllannthus maderaspatensis, Portulaca oleracea, Sida acuta and Celosia argenstia among dicots. All the weed control treatments resulted significant reduction in weed growth in terms of density and dry weight as compared to weedy check. Significantly lower weed population and dry weight of weeds was recorded with thrice hand weeding at 35, 50 and 65 days after transplanting (DAT). Among herbicides, it was lowest with Pendimethalin 30% EC PRE @ 4160 ml ha-1 (1250 g a.i.) -1 IC at 30 DAT and pendimethalin 30% EC PRE @ 4160 ml ha-1 (1250 g a.i.) propaquizafop 10% EC PoE @ 625 ml ha-1and propaquizafop 10% EC PoE @ 1250 ml ha-1. The maximum green chilli yield (22.0 t ha-1) was recorded three hand weedings at 35, 50 and 65 DAT and lowest green chilli yield was recorded with weedy check (12.1 t ha-1). Maximum benefit cost ratio was recorded with pre emergence application of pendimethalin 30% EC @ 4160 ml ha-1 (1250 g a.i.) followed by Propaquizafop 10% EC @ 625 ml ml (62.5 g a.i.) ha-1 (2.46).

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