At the Multi Commodity Exchange, mentha oil for delivery in August fell by Rs 5.70 or 0.61 per cent to Rs 918 per kg with a business volume of 876 lots.
Similarly, mentha oil for current month delivery traded down by Rs 2.90 or 0.31 per cent to Rs 908.60 per kg with a business turnover of 57 lots.
The fall in mentha oil prices at futures trade was mostly due to profit-booking by speculators and weak trend at spot market on subdued demand, marketmen said.