Seen something unusual?   MAKE A REPORT

Login/Register
Kiwifruit's most unwanted

Kiwifruit's most unwanted

There are eight organisms identified as the biggest biosecurity threat to New Zealand's kiwifruit industry.

Latest news
Close
 Kiwifruit's most unwanted

Kiwifruit's most unwanted

Fruit flies

Fruit flies are the kiwifruit industry's most unwanted biosecurity threat. Any incursion can severely impact where we sell our fruit. The high risk period for fruit flies is September to June.

The Queensland Fruit Fly (QFF), native to Australia (our closest neighbour), is considered to be the greatest threat and has the most market impacts.

The financial impact of a fruit fly incursion in Te Puke to New Zealand’s kiwifruit industry is estimated to be between $200 million and $695 million. A Kiwifruit Journal article summarises the financial impacts of different incursion scenarios based on previous fruit fly incursions in New Zealand and overseas and economic modelling by Underwood (2023).

Threat Levels
Likelihood of entry
High
Likelihood of establishment
Medium
Production impacts
Medium
Market access impacts
High

Pest ranking based on the KVH risk matrix

View risk matrix

KVH has developed a guide for growers that details the likely sequence of events if a fruit fly response was to occur in a kiwifruit growing region.

Plant & Food Research have been granted permission to import sterile QFF into a New Zealand containment facility to develop new attractants for female and male flies.

This long-term project will determine what the flies can smell and whether the odours can be used to improve the sensitivity of traps or increase the numbers of flies lured in. Three approaches are being used; odours based on host fruit, sex pheromones and bacteria.

This research is part of a larger collaborative approach with Australian organisations to manage and eradicate QFF populations. 

Supporting this is a Sterile Insect Technique (SIT) facility that can produce 50 million sterile QFF per week as an eradication tool for release in Australia or New Zealand should an established population ever become large enough for this to be required. Read more about the project here.

KVH supports these research activities as an integral component of our readiness activities for the industry’s most unwanted biosecurity threat.


Further fruit fly resources

SEEN SOMETHING UNUSUAL?

KVH investigates reports of unusual symptoms to identify and manage any biosecurity risks.

Make a report

LATEST NEWS

24 Aug 2026

Annual Report available now

Hot off the press at the AGM were printed copies of our new Annual Report. Please email us if you would like a copy sent to you. The booklet details our key activities and achievements over the last 12 months, a year where preparedness was put to the test, and responses were in action. Read the 2025/26 report

Read more about Annual Report available now

27 Aug 2026

Pollen providers and distributors to register with KVH

Pollination is one of the most important activities in the orchard calendar. Many kiwifruit orchards rely on artificial pollination, as well as pollination by bees, to ensure effective pollination takes place. The movement of pollen and flowers between orchards and regions must be managed to minimise the risk of disease spread and movement to orchards where Psa is not detected, and to the South Island, is strictly prohibited or restricted. All pollen providers and distributors of pollen are required to register with KVH, and growers should only be sourcing pollen from these registered providers. All kiwifruit pollen operators - defined as "every person or entity collecting, milling, selling, distributing and/or artificially applying pollen"- must register with KVH annually via the KVH website. This includes all pollen mill operators (including growers who mill for their own use) and anyone who has sourced pollen from a mill for further distribution. More information is available on the KVH website here.

Read more about Pollen providers and distributors to register with KVH

24 Aug 2026

Biosecurity at national young grower competition

KVH is proud to be a sponsor of the Young Grower of the Year National Final, supporting the next generation of horticultural leaders. As part of the competition (taking place in Cromwell), KVH is hosting a biosecurity module, challenging finalists to apply their knowledge and decision-making skills to real-world biosecurity scenarios. The grand final takes place tomorrow, with the country’s top young growers taking the stage one final time to compete in the speech module, before the 2026 title winner is announced. Biosecurity is everyone’s responsibility, and it’s encouraging to see the calibre of young growers stepping up. We’ll have more about the biosecurity module in the next Bulletin. Meet the finalists

Read more about Biosecurity at national young grower competition
View all

USE THE WEATHER & DISEASE PORTAL

The KVH portal is now the Zespri Weather & Disease Portal. Access all the weather tools you're familiar with.

Open now