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Psa-V

Psa-V

Psa-V Pseudomonas syringae pv. actinidiae (Psa) is a bacteria that can result in the death of kiwifruit vines. It was first discovered in New Zealand in November 2010 and rapidly caused widespread and severe impacts to New Zealand's kiwifruit industry.

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Psa-V

Psa-V is a bacterial disease of kiwifruit vines and a major threat to the New Zealand kiwifruit industry. It carries no risks to human or animal health and does not affect plants other than kiwifruit vines.

First detected on a Te Puke orchard in November 2010, Psa has since been identified in numerous kiwifruit growing regions across New Zealand. Growth of Psa bacteria outside/inside kiwifruit vines can result in leaf spotting, cane/leader dieback and, in extreme cases, vine death accompanied by the production of exudates.

Since it's initial detection a significant amount of funding and resource has gone into an ongoing Psa-V research and development programme to better understand and manage the disease.

ACCESS THE ZESPRI WEATHER & DISEASE PORTAL

This online, weather-based decision support tool assists growers with orchard management in a Psa environment. 

Weather station data and weather forecast information is combined to provide customised access to unique weather information, disease information and interpretations. 


Based on the programme's results (combined with on-orchard experience) best practice advice and resources are developed and used by the industry, working collectively at an orchard, regional and national level to reduce Psa spread and impacts, and ensure day-to-day management of the pathogen. This information is produced and co-ordinated by Zespri, and is available online here.

As the kiwifruit industry's dedicated biosecurity agency, KVH leads all high-risk management of Psa and preparedness for any new variants. As such, Psa remains a specified organism in the Pathway Management Plan,which ensures we continue to have the ability to manage the spread of Psa within New Zealand and respond to new forms of Psa should they be found.


PSA SUPPORT AND RESOURCES

  • Visit the Zespri Canopy here for current Psa information and resources related to on-orchard management and best practice advice.
  • Contact Zespri directly at 0800 155 355 (or 07 572 7600), or email psa@zespri.com.
  • Contact your local KVH Regional Coordinator.
  • Speak with your local post-harvest grower liaison, technical expert, or merchant (e.g. Farmlands, PGG Wrightsons).
  • See Psa resources and information previously produced by KVH online here.

SEEN SOMETHING UNUSUAL?

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

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

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