Why is worker exploitation so prevalent in the blueberry industry?

The Australian blueberry industry has experienced rapid and unprecedented expansion in recent years. And while the increase in production means cheaper prices and more choice at the checkout, there is a dark side to the industry unseen to shoppers. Investigative journalist and Guardian Australia NSW state correspondent Anne Davies speaks to Nour Haydar about growing concerns over treatment of workers, and the use of pesticides in the intensive farming of the fruit