Marketmen said cutting down of bets by speculators in line with a weak trend at the markets, mainly led to the fall in castorseed prices in futures trading.
Slackened industrial demand and increased supplies from growing belts which kept prices lower at the spot markets, too weighed on sentiments, they added.
At the National Commodity and Derivatives Exchange, castorseed for most-active delivery in June receded by Rs 38, or 0.83 per cent, to Rs 4,531 per quintal, with an open interest of 1,00,440 lots.