A third Queensland fruit fly has been found on Auckland's North Shore.
The fruit fly was caught in a trap 113 metres from where a single male Queensland fruit fly was detected almost two weeks ago in Northcote. Another one was earlier found in Devonport.
Biosecurity New Zealand spokeswoman Dr Catherine Duthie said all the other surveillance traps in the area have been checked and no more had been spotted.
"This latest detection is further evidence that our surveillance programme is working and it is pleasing we still have no indication of an established breeding population," Duthie said.
As a result of the latest detection, the trapping and surveillance programme would be boosted with 140 Biosecurity New Zealand staff, contractors and industry partners working on the problem.