Field experiment was conducted for two consecutive summer seasons (1999 and 2000)

at Kukumseri on sandy loam soil to evaluate promising herbicide combinations for weed

control in pea. Alachlor at 1.0 kg+pendimethalin at 0.9 kg ha· l and alachlor at 1.0 kg+

isoproturon al.1.0kg ha- l were statistically similar tQ alachlorat 1.5 kg ha· l, pendimethalin at

1.2 kg ha· l and hand weeding twice in reducing density and dry weight of weeds. These were

significantly su~rior in reducing weed density and weight as compared to other treatments.

Alachlor at 1.0 kg+pendimethalin at 0.9 kg ha- l recorded the highest weed control efficiency

of 87.5%. Pendimethalia 1.2 kg ha· l gave highest grain yield which was significantly higher

than pendimethalin at 0.9 kg+isoproturon 0.75 kg ha· l, ~ndimethalinat 0.6 kg+isoproturon

at 1.0 kg ha- l, pendimethalinat 0.6 kg+isoproturon at 0.75 kg ha-land alachlor at

0.75+isoproturon at 0.75 kg ha- l. Alachlor at 1.50 kg ha- l recorded highest marginal benefit

cost ratio (MBCR). The combinations of alachlor at 0.75-1.00 with isoproturon at 0.751.00

kg ha· l were superior to other herbicide treatments in increasing MBCR.