EFFECT OF SEED RATE AND PRE-EMERGENCE HERBICIDES ON WEED CONTROL IN WET SEEDED RICE

摘要

An experiment was conducted at Agricultural College and Research Institute, Madurai during Kuruvai (Kharif) 1994 to study the effect of seed rates and pre-emergence herbicides in weed control and grain yield of wet seeded rice. A seed rate had no significant effect on weed density and grain yield. A seed rate of 80, 100 and 120 kg ha~(-1) were comparable . Pre-emergence application of pretilachlor + safener (fenclorium) at 0.3 kg ha~(-1) on 3 days before sowing or 3 days after sowing and Butachlor 1kg ha~(-1) applied at 3 days before sowing recorded significantly higher grain yield. The effect of application time or weed density and grain yield varied between herbicides