The Greens says Western Australian canola crops need to be protected from contamination as international demand plummets for genetically modified crops. This week it was revealed CBH is paying up to $45 a tonne less for GM canola than its organic counterpart. The markdown has prompted the Australian Wheat Board to offer to buy GM canola at a guaranteed price of only $10 a tonne less than non-GM canola. Ten per cent of WA’s canola crop is now GM and Greens’ Senator Rachel Siewert says there needs to be liability insurance for farmers at risk of GM crop contamination.