http://www.orissa.gov.in/agriculture/Kharif/Kharif%20Mannual-2008.pdf

Chemical control of weeds

Pre-emergence application of pendimethalin/metolachlor @ 0.75 kg/ha or alachlor @ 1.0 kg/ha or pre-planting incorporation of fluchloralin @ 0.75 kg/ha controls weeds effectively. Post emergence spray of quizalofop ethyl 5 EC @ 0.05 kg or fluazifop-p-butyl 28 EC @ 0.25 kg/ha at 20 days after sowing takes care of later fluss of weeds.