A field experiment was conducted during the winter (rabi) seasons of 1988-89, 1989-90 and 1990-91 to iind out the most effective and economical weed management practice for blonde psyllium or isabgul (Plantago ovata Fors) crop. Hand-weeding treatments significantly suppreseed the weed growth and produced more seed compared with weedy check. Among herbicides, only isoproturon (pre-emergence application at 0.50 or 0.75 kg ai/ha) gave similar control of weeds to that of hand-weeding. Pre-emergence application of isoproturon at 0.50 kg ai/ha recorded the highest net increment cost: benefit ratio (1:9.20).