Castorseed futures turned bearish on Friday on higher arrivals in the spot and profit-booking by bull operators.
On the NCDEX, the oilseed for December delivery declined by 2.08 per cent to Rs 3,478 a quintal, while the January and February series shed 2.12 and 2.03 per cent each to Rs 3,550 and Rs 3,611, respectively.
At Rajkot, arrivals were 16,000-17,000 bags (of 75 kg each) against yesterday's 13,000-14,000 bags.
In the spot market at Disa (Gujarat), castorseed was quoting down at Rs 3,521.75 a quintal.