Mr Dunne said he was extremely grateful for the support of residents and businesses in the affected suburbs.
"You've borne the brunt of this situation with both the movement restrictions and regular insecticide baiting on fruiting plants in your gardens and we're extremely grateful for your support."
The Queensland fruit fly was a significant threat to New Zealand's $3.6 billion a year horticultural exports industry and home gardens, he said.
"This makes the eradication cost of $13.6 million (as at the end of October) a very justifiable investment to make."
The programme begun in February this year when a single Queensland fruit fly was caught in one of MPI's extensive network of fruit fly surveillance traps.
A small breeding population of the fruit flies were soon found which resulted in insecticide treatments, trapping and community education.
The Ministry for Primary Industries would continue to routinely check for fruit flies and the nationwide network of 7600 fruit fly surveillance traps would remain in place.
Mr Dunne reminded Kiwis travelling overseas to declare or dispose of biosecurity risk goods such as food when returning to the country.
-NZH