"It's no great surprise that we are seeing the reputation of the major supermarkets fall off the cliff," Mr Griffith said, when asked about the decision by SPC to reduce its intake of peaches and pears next season.
"Growers cannot get a fair return on their produce; we have growers out there who reported they have not had a price increase for 15 years.
"That is the level of domination of Coles and Woollies in this country."
Mr Griffith said the tough environment for growers posed a threat to national food security.
He hoped the Federal Government's review of the major supermarkets could get them a better deal.
According to the Australian Manufacturing Workers Union, employees at SPC have been given no indication about potential job cuts.
“There's been no consultation around this announcement,” union organiser Candice Tierney said.
"Which is not throwing us all under the bus, but (we're) a little bit disappointed they haven't presented an offer to the employees about what this looks like."
Speaking to a Senate inquiry into supermarket pricing earlier this year, Coles chief executive officer Leah Weckert said they worked hard to interact in a fair, honest and transparent manner with suppliers.
“If a supplier does have a concern, not only do we have confidential robust internal mechanisms, but we are bound by the Food and Grocery Code of Conduct which has alternative complaint mechanisms and is enforced by the ACCC,” Ms Weckert said.
“However, we are listening and acknowledge some of the concern that has been raised by the farming sector — particularly the horticulture sector around price transparency.
“Coles would be very willing to be part of a solution that would involve greater transparency for fresh produce growers.”
