New Delhi, Sept. 15 -- For decades, legacy dairy cooperatives have dominated the southern states and made a tidy profit selling milk. Now, India's largest dairy brand, Amul, is making a push to expand in the south, which could shake up the milk industry in the five states of the region.

Amul, the force behind the white revolution that makes India the largest milk producer, has been selling other dairy products such as cheese and butter in South India. Its plan now is to sell 3-4 million litres of milk across the region, with Andhra Pradesh as hub.

"We started with the west, then went to the north, and east... Somehow we had not gone to the south," said R.S. Sodhi, managing director, Gujarat Cooperative Milk Marketing Federation, which sel...