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Kiwifruit's most unwanted

Kiwifruit's most unwanted

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

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 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

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LATEST NEWS

05 Oct 2026

Moving beehives across Cook Strait for pollination?

As pollination season gets underway, KVH reminds growers and beekeepers that any movement of beehives across Cook Strait for use in kiwifruit orchards or nurseries requires prior KVH authorisation. The Cook Strait remains an important biosecurity barrier between the North and South Islands. Because the South Island remains free of Psa-V, controls are in place to help prevent the spread of the pathogen through pollination-related activities, including the movement of beehives. Before moving hives across Cook Strait: Contact KVH at least seven days before the proposed movement to obtain authorisation. Where hives have been used on North Island kiwifruit orchards, a minimum 10-day stand-down period is recommended at a North Island location outside kiwifruit growing regions before moving south. Ensure hives, pallets, machinery, vehicles, tools, equipment and footwear are free of kiwifruit plant material and debris and sanitised using a KVH-approved sanitiser. Contractors without a Zespri CAV must complete a Non-CAV Contractor Biosecurity Plan before entering orchards. Growers also have a role to play by confirming where pollination hives are coming from, ensuring biosecurity requirements have been met, and reporting any unusual symptoms in their orchards to KVH immediately. These requirements are part of the Biosecurity (National Kiwifruit Pathway Management Plan) Order 2022, with compliance helping protect the South Island and the wider industry from Psa-V. Non-compliance with plan rules may constitute an offence under the Biosecurity Act 1993.

Read more about Moving beehives across Cook Strait for pollination?

05 Oct 2026

National award recognises hornet response

A significant milestone for New Zealand’s biosecurity system was recognised last week when the yellow-legged hornet response received the Innovation Award at the Spirit of Service Awards. The awards recognise initiatives that deliver outstanding outcomes for New Zealand, and the Innovation Award acknowledges the response’s use of advanced technology, large-scale field operations and strong community partnerships. KVH is proud to be part of the response alongside Biosecurity New Zealand. The award is a testament to the collective efforts of everyone involved, including SPS Biota, UK technical experts, local communities, beekeepers, growers, iwi, industry personnel (including teams from APAC, Punchbowl and Trevelyan’s), contractors and response staff who have contributed their expertise, time and commitment throughout the programme.

Read more about National award recognises hornet response

05 Oct 2026

Understanding our response to bird flu

Bird flu (H5N1) has now reached New Zealand, making awareness and preparedness more important than ever. Tauranga Moana Biosecurity Capital and Te Tira Whakamātaki are hosting a free webinar with experts from the Ministry for Primary Industries, Department of Conservation, Health New Zealand and Bay of Plenty Regional Council. Learn about the current response, risks to wildlife, animals and people, what to do if you find a sick or dead bird, and how agencies are preparing. Join the conversation next Thursday 15 October, 1.00pm – 2.00pm. Register now and receive your calendar invite

Read more about Understanding our response to bird flu
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