Mentha oil futures for April fell by Rs 8.70, or 0.86% to Rs 1,001 per kg in 1,021 lots.
At the Multi Commodity Exchange (MCX), the May contract shed Rs 1.80,or 0.18% to Rs 991.80 per kg in 92 lots.
Subdued domestic demand and adequate supplies on increased arrivals from Chandausi in Uttar Pradesh affected the mentha oil trade.