One story has dominated this week's headlines - the latest food safety scandal to hit China. As the scare around baby milk powder has spread to liquid milk and other dairy products, so has the gloom over the future for the country's dairy sector - and questions over China's record on food safety. Elsewhere, Tesco fired its latest salvo in the UK price war, while Tyson Foods spread its wings into Brazil with a series of acquisitions. These are the top stories on just-food this week.