Castor seed prices drifted lower by Rs 20 to Rs 4,146 per quintal in futures trade as participants liquidated holdings in line with a weakening trend in spot markets.
At the National Commodity and Derivatives Exchange, castor seed for delivery in May dropped by Rs 20, or 0.48 per cent, to Rs 4,146 per quintal, clocking an open interest of 76,240 lots.