The Ministry for Primary Industries is investigating the discovery of a single male Queensland fruit fly – possibly the biggest single insect bio-security threat to the kiwifruit industry.

The fly was found about 400 metres from where a single fly was found in Whangarei in January this year.

Queensland fruit fly.

Collected from an MPI routine surveillance trap on Tuesday and formally identified late yesterday, MPI deputy director general compliance and response Andrew Coleman says the insect was trapped in the Parihaka area of Whangarei.

'However, all our information at this stage tells us this detection is a new find and not related to the January incident.

'Queensland fruit fly has been found four times in New Zealand previously, including the January Whangarei detection. In all these earlier cases, increased trapping found no further flies,” says Andrew.

MPI is responded promptly with field teams already working in the area setting additional traps to determine if other fruit flies are present and providing information to residents.

'As in January, it is vital we find out if the insect is a solitary find – or if there is a wider population in Whangarei,” says Andrew.

'This insect is an unwanted and notifiable organism that could have serious consequences for New Zealand's horticultural industry and home gardeners. It can damage a wide range of fruit and vegetables.”

MPI is working closely with international trading partners and the horticultural industry to minimise the risk to New Zealand growers and exporters.

Andrew says the Ministry is defining a controlled area around the location of the fruit fly detection and the movement of fruit and vegetables out of this area will be restricted. MPI will provide extensive information about this in the near future and will work closely with the local community.

'The Whangarei community were immensely supportive of our efforts earlier this year and we anticipate they will be again. It is, of course, disappointing that this situation has recurred.”

Andrew says the most likely way that fruit fly can arrive in New Zealand is in fresh fruit and vegetables.

MPI has strict import requirements in place to minimise this risk. All plant material and fruit that can host the Queensland fruit fly can only be imported if it meets our standards – and these include measures such as approved pre-export treatment or certification of pest freedom by exporting countries.

Air and sea passengers are prohibited from bringing fresh fruit and vegetables into the country.

'The Ministry is aware that fruit fly populations have dramatically increased in Australia in recent months and in light of the previous Whangarei find, we have been reviewing our importing requirements for fruit fly risk goods.”

Andrew says it's important to bear in mind MPI has, to date, been highly successful in keeping this insect threat out of New Zealand crops.

'This latest find demonstrates the benefit and effectiveness of MPI's lure-based surveillance trapping network and the biosecurity system.

'By setting traps for these pest insects, we are able to detect their presence early, have assurance about exactly where the problem is located and respond faster and more effectively where finds like this are made.”

Residents in affected parts of Whangarei may notice increased activity in their neighbourhood during the next few days, as MPI staff go about their inspections and trapping. MPI asks that people support this important work.

Information about the Queensland fruit fly is on the MPI biosecurity website here.