Potato Mop Top Virus

In September 2018, a New Zealand potato processing facility identified a symptom of Potato Mop Top Virus (PMTV) in a tuber on a processing line.

A biosecurity incursion was announced and along with the Ministry for Primary Industries, a response was launched.

It became evident early in the response that the disease couldn’t be eradicated and the best outcome for potato growers is industry led, long-term management.

Biosecurity New Zealand continues to support our industry in helping us with long-term management, which includes non-regulatory controls and voluntary agreement.

Potatoes New Zealand has conducted a survey of growing areas and developed an identification guide for growers.

This page has the most recent updates and resources.

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PMTV Stakeholder Update August 2019
Pest & Disease Poster
Pest & Disease Handbook 2018
CPLI Slide Deck
Guidance for the MPI Phytosanitary Official Assurance Programme for Potato Cyst Nematode and Potato Wart
Potato Cyst Nematode – Effective Hygiene Practice
2018 Seed Potato Virus Survey
Zebra Chip Management in the USA
Zebra Chip Management in USA
Year 3 report evaluation of seed tuber and in-furrow fungicides on the control of soil-borne diseases in potatoes
CPLI Newsletter – January 2026
Potato Virus Sample Submission
Pukekohe Potato Early Blight Report – Dec 2024
Powdery Scab Management
2020 PNZ PMTV Identification Guide
Early Blight Resistance Management Guidelines
2018 Potato mop-top fact sheet
Early Blight Technical Bulletin – December 2024

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