The discovery of a second Queensland fruit fly in Whangarei has been slammed as "unbelievable" as concerns are raised about New Zealand's biosecurity preparedness.

A prominent agricultural scientist says New Zealand deserves only a half-mark for its biosecurity efforts - and warns that new free-trade agreements and increased tourism could pose a threat at the border.

At a secret location just north of Auckland, an experiment has started which might alter the face of New Zealand's $12 billion dairy industry.

An attempt by an airline passenger to bring two crates of fresh mangoes into NZ could have had dire consequences if the fruit reached our orchards, says border security.

Kiwifruit growers are hoping the vine-killing disease Psa will soon be declared an "adverse event".

As valuable to marine life as it is prized by humans, the Hauraki Gulf is in decline. Though solutions seem as elusive as the gulf's fish stocks, a groundswell is building for collaboration.

The controversial compulsory electronic tagging for all cattle finally goes live this weekend.