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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 to New Zealand’s kiwifruit industry is estimated to be between $2 million and $430 million. KVH has produced a short report summarising the financial impacts of different incursion scenarios based on previous fruit fly incursions in New Zealand and overseas and economic modelling by Underwood (2007).

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

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

13 Jan 2025

Welcome back

We hope you all had a merry Christmas and were able to enjoy the holiday season with family and friends. We look forward to working with you throughout the year ahead, ensuring our biosecurity system remains strong and we keep damaging exotic pests and diseases from our orchards.

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16 Jan 2025

South Auckland fruit fly controls to remain in place

Legal controls on the movement of fruit and vegetables in Papatoetoe will remain in place for the next few weeks as part of the response to the discovery of a single male Oriental fruit fly earlier this month. Sector groups, including KVH staff and industry personnel from Punchbowl and APAC, have been providing support for heightened operational activities, which are continuing a little longer as a precautionary approach. It’s anticipated the restrictions will remain in place until mid-February. This is vital to success in keeping fruit fly out of New Zealand and protecting kiwifruit growers, and horticultural exports. It also ensures we can be confident there is no breeding population – this timeframe is based on scientific advice about the life cycle of the Oriental fruit fly. To date, no other Oriental fruit flies have been found. Fruit fly traps will continue to be regularly checked, and specialist staff in the mobile field laboratory will cut up and inspect fruit and vegetables collected in the area for any signs of larvae. So far more than 200kg of produce has been examined. There is no change to the current movement rules that are in place. The A and B Zone areas in Papatoetoe will remain the same and the instructions on the disposal of produce waste remain unchanged. Significant response updates will continue to be posted on the KVH website as they occur. Useful resources Biosecurity New Zealand website for detailed response maps, information, and resources, in many languages. KVH Oriental fruit fly fact sheet. KVH Oriental fruit fly identification guide.

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14 Jan 2025

Meet the team

Next in our series of team member introductions is Linda Peacock, our Industry Liaison & Technical Specialist. We started this series to share more about the roles we have, and how each of us interact with you, our readers and growers, in our day-to-day activities. I’ve been with KVH since its earliest days in 2011, working with growers and technical teams from all growing regions to build knowledge around best practice, particularly in terms of management of Psa. I was a long-term member of the Psa Steering Group and now am part of the Technical Working Group in the crop protection and market access innovation space where Psa related projects are considered alongside the wider scope of crop protection risks. I enjoy connecting industry players with researchers, to support projects and surveys which underpin both the crop protection and biosecurity industry space. My role has expanded over time to focus more on wider biosecurity, including managing and looking into reports of unusual symptoms seen on vines and fruit, and coordinating KiwiNet members as well as regional coordinators who all help growers and KVH build biosecurity awareness and preparedness. Meeting and sharing knowledge with a wide range of great people across the industry is the best part of my job, especially on-orchard and at field days and workshops where I can help turn technical advice into practical, easy, day-to-day activities for all growers and contractors. When I’m not working, I enjoy gardening and cycling, kayaking, and walking adventures in the great outdoors.

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