Take the Queensland fruit fly, for example. The last time we had a small incursion of the Queensland fruit fly, in Northcote and Devonport, it cost us $12 million to eradicate. But if travellers are told on the plane not to bring in the apple that they've put in their bag, but to leave it on the plane or put it in an MPI bin at the airport, that reduces the risk of an undetected fruit fly or larva hitching a ride into New Zealand. 