Mentha oil prices edged lower on Monday amid lukewarm demand in the spot market. At 5:09 pm, mentha oil futures trading on the Multi Commodity Exchange ( MCX) traded lower by Re 1, or 0.1 per cent, at Rs 961.50 a kg, having moved in the Rs 954-968 range earlier in the session. In the previous session, mentha oil had declined 0.23 per cent to settle at Rs 962.50 a kg. Ajay Kedia, Managing Director at brokerage Kedia Advisory, said sowing is going on for the commodity, and industry demand may increase in the coming summer season. Some estimates shows mentha sowing in the country can match last year's levels.