Two more male Queensland fruit flies have been found in Northcote on Auckland's North Shore, bringing the total number of fruit flies found in Auckland to 10.
Head of Biosecurity New Zealand, Roger Smith, said the latest finds will mean an expansion of Zone A in Northcote and associated restrictions on the movement of fruit, vegetables and green waste: "These recent finds mean we are zeroing in on the Northcote flies and we can increase our operational response."
"Our teams on the ground will be removing fallen fruit from backyards, inspecting compost bins and placing bait on fruit trees to attract and kill adult flies, in particular females."
Auckland University biological sciences professor Jacqueline Beggs said any detection of a fruit fly was worrying, but the fact numbers had risen meant it could be more likely there was a small breeding population in Auckland.
However, the fact MPI was catching the fruit flies was proof the biosecurity system was working, she told stuff.co.nz.