Turmeric futures for May fell by Rs 20, or 0.3%, to Rs 6,670 per quintal in 7,255 lots.
At the National Commodity and Derivatives Exchange, the April contract lost Rs 6, or 0.09%, to Rs 6,560 per quintal in 28,535 lots.
Speculators trimming their positions, weak export demand and higher carry-forward stocks triggered the downtrend.
However, reports of lower area under cultivation due to scant rainfall during the planting season limited the gains.