http://www.jnkvv.nic.in/IPM%20project/weed-management.html#Achyranthus_aspera

Chemical Control of weeds in groundnut

• Pre Planting Incorporation of Fluchloralin at 0.9 to 1.2 kg/ha controls some broad leaf weeds.
• Two hand weeding along with two interculture by kolpa + diuron 0.75 or pendimethalin 1.5 kg/ha.
• An application of 750 ml Diuron 80 WP/ha as Pre-emergence (PE) in 700 - 800 l water/ha.
• An application of pendimethalin as Pre-emergence (PE)1.5 kg/ha is also found effective in controlling the weed population. 
  
• Pre-emergence (PE) application of alachlor at 2.0 to 2.5 kg/ha.