Marketmen said cutting down of positions by traders, tracking a weak trend at the spot markets, led to fall in castorseed prices in futures trade here.
Besides, muted export demand at existing levels too dampened trading sentiments, they added.
At the National Commodity and Derivative Exchange, castorseed for delivery in June contracts weakened by Rs 29 or 0.67 per cent to Rs 4,288 per quintal, having an open interest of 28,450 lots.