Growers have just completed harvesting the Atherton Tablelands, Queensland's biggest potato production area.
Farmers averaged $300 a tonne, half of what they were expecting.
Wholesaler Paul Stadhams told abc News it will affect next year's crop. He said: "Compared with previous years that's pretty down. It will stifle a lot of people.
"It will certainly cut back a lot of capital investment which should happen, and it will make people think twice before they plant potatoes next year."
Preview: processing lines requirements for exotic #potato shapes http://t.co/DF9HTjDzKy
@PotatoCouncil's action to support #Scottish #potato industry: http://t.co/dtDUfnSmD2
The summer issue of Potato Business Digital is now online! http://t.co/tMcIZ67HfE