Mentha oil futures for January declined by Rs 10.50, or 0.75% to Rs 1,392 per kg in 537 lots.
At the Multi Commodity Exchange, the February contract traded lower by Rs 10, or 0.71% to Rs 1,406.20 per kg in 72 lots.
Profit-booking by speculators at prevailing higher levels, reduced spot market demand affected the trade.
Increased arrivals from Chandausi in Uttar Pradesh also fuelled the downtrend in mentha oil futures.
