In September 2018, a NZ potato processing facility identified a symptom of Potato Mop Top virus 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.

PNZ has conducted a survey of growing areas and developed an identification guide for growers.

This page has the most recent updates and resources.

Useful Links:

• Cornell University College of Agriculture & Life Sciences: “Management of Potato Tuber Potato Necrotic Viruses”
• North Dakota State University: “Potato Viruses: Mop-top Management”
• North Dakota State University: “Potato Extension”