Contribution from Department of Agronomy, Punjab Agricultural University, Ludhiana 141 004 (India).
Field studies carried out at the Punjab Agricultural University, Ludhiana, durina 1989–90 and 1990–91 revealed that in pea, pre-emergence application of pendimethalin 0.75 kg/ha resulted in highest weed control efficiency (88.6%) and produced maximum grain yield which was significantly more than that under linuron 0.75 kg/ha, isoprotwon 0.75 ka/ha, cross sowing and unweeded control. However, this treatment was at par with methabe nzthiazuron 1.31 kg/ha and two manual weedin,s given 3 & 5 weeks after sowing (w.a.s). Maximum net returns of Rs. 5324/ha, over unweeded control was obtained with pendimethalin 0.75 kg/ha as against Rs. 3940/ha with two hand weedings. The pea variety Bonnville produced highest grain yield whereas lowest was obtained with Punjab 87.
