A number of farmers are expected to exit the sector after four leading supermarket chains reduced the price of milk again.

That's the warning from the Irish Creamery Milk Suppliers' Association.

Lidl and Aldi dropped their own-brand milk products by 10 cent yesterday, with Tesco and Supervalu set to follow suit tomorrow.

Pat McCormack from ICMSA says these reductions are making dairying unviable for many farmers.