At the Multi Commodity Exchange, mentha oil for delivery in June fell Rs 10.60 or 1.25 per cent to Rs 837.50 per kg, with a business volume of 374 lots.
Also, mentha oil for July delivery drifted by Rs 10.10 or 1.18 per cent to Rs 848.40 per kg, with a business turnover of 67 lots.
The fall in mentha oil prices was mostly due to profit-booking by speculators and weak trend at the spot market on subdued demand, marketmen said.