The increase resulted from rising prices for paddy, rubber and oil palm, following the drop in yields.
Conversely, the prices of cassava and maize for animal feeds dropped because their yields increased and cheaper wheat was imported for use in animal feed.
In September, the amount of produce was up 4% year-on-year due to the large crops of maize and longkong fruit. This compared with 15.2% in August, Ms Jariya said.