Extra staff and biosecurity dogs will be out in force to combat the fruit fly during the coming cruise ship season.

The season coincides with the period the Ministry for Primary Industries is most worried about a fruit fly breach - like that in Auckland's Grey Lynn.

The Ministry would have 20 extra detector dogs at airports and where cruise ships dock, MPI's head of intelligence and operations, Stephanie Rowe, said.

That takes its number of detector dogs up to 60, which extends their coverage, she said.

Advertisement

There would also be new x-ray machines coming into play as well.