Foodcorp has been fined R88.5-million for price fixing and creating a cartel, according to the Competition Commission.
Consumers want their maize meal and flour to be white, even though this makes them less healthy.
Judgment has been reserved in an appeal case by organisations against a decision to deny them a class action lawsuit against major bread companies.
Pioneer Foods was told it has to reduce the sale price of bread and flour products as part of a R1,05-billion settlement for price-fixing.
How Tiger Brand bosses bailed out while selling R44-million in shares.