Email:
amansidhu_80@rediffmail.com
Address:
Department of Agronomy, Punjab Agricultural Univerisity Ludhiana, Punjab 141 004
Direct-seeded rice, Dry matter accumulation, Herbicides, Seed yield, Weed control
Field experiments were conducted during Kharif season of 2007 and 2008 at Punjab Agricultural University, Ludhiana to evolve suitable combination of pre and post-emergence herbicides for effective weed management in direct-seeded rice under unpuddled conditions. Results indicated that during 2007, integration of post-emergence application (30 Days after sowing) of bispyribac (25 and 30 g/ha) or azimsulfuron (20 g/ha) with pre-emergence application of pendimethalin 0.75 kg/ha, pretilachlor 0.5 kg/ha and thiobencarb 1.25 kg/ha provided effective control of weeds and produced significantly higher grain yields than unweeded (control) treatment. During 2008 also, integration of pre-emergence application of pendimethalin 0.75 kg/ha or oxadiargyl 0.90 g/ha with post-emergence application of bispyribac 25 kg/ha, azimsulfuron 20 g/ha and 2,4-D 0.5 kg/ha resulted in significant reduction in dry matter of weeds and increased grain yield as compared to alone application of pendimethalin 0.75 kg/ha. Pre-emergence application of flufenacet 80 g/ha and early post-emergence application of penoxsulam 30 and 35/g ha were found ineffective for controlling weeds.