Abstract:
Dry seeding of rice (Oryza sativa L.) involves a major change in the production practices for attaining optimal plant density and high water productivity in the waterdeficit areas of Pakistan. Weeds pose serious threat to sustainability and viability of direct seeded rice system. Information on weed management in dry seeding rice in Pakistan is lacking. A field experiment was conducted to identify appropriate, effective, and economical methods of managing weeds in dry-seeded rice. The major weeds associated with dry-seeded rice were Echinochloa crusgalli, Cyperus iria, C. difformis, Paspalum distichum, Eclipta prostrata, and Trianthema portulacastrum. Pendimethalin 750 g a.i. ha-1, ethoxysulfuron at 18 g a.i. ha-1, and 2,4-D (ester) at 500 g a.i. ha-1, were equally effective in realizing higher rice grain yields by controlling broad leaf weeds and sedges. Among these, 2,4-D (ester) at 18 g a.i. ha–1 was found to be least expensive but effective for controlling broad leaf weeds. Effective and economical weed control methods include pre- and post-em herbicides along with one hand weeding was found effective in controlling weeds and producing higher paddy yield.
Page(s):
219-226
DOI:
DOI not available
Published:
Journal: Pakistan Journal of Weed Science Research, Volume: 13, Issue: 3--4, Year: 2007