Futures contracts of coriander on the NCDEX slipped below the crucial support level of 5,000 rupees per 100 kg due to continued selling pressure amid high supply. June contract hit a 4% lower circuit of 4,965 rupees per 100 kg, also a four-and-a-half year low. Rising stock of coriander at exchange-accredited warehouses and market buzz of rising imports of substantially cheaper Ukrainian crop have led to the fall in coriander futures despite strict curbs in form of margins and position limits by the exchange. Stocks of the spice at NCDEX-accredited warehouses rose to 32,130 tonne on Tuesday, up 10,728 tonne on month.