Mar 20, 2023
Potato wart not detected in 2022 national survey

The Canadian Food Inspection Agency (CFIA) has completed its 2022 national survey for potato wart and confirms that potato wart was not detected in the soil samples tested from the fields where the samples were collected. The survey included fields in British Columbia, Alberta, Saskatchewan, Manitoba, Ontario, Quebec, New Brunswick, and Nova Scotia.

The national survey for potato wart involved collecting and testing nearly 1500 soil samples from seed potato fields. One criterion included in field selection was farms that had previously sourced seed potatoes from Prince Edward Island (PEI).

This survey is an important step in the Government of Canada’s efforts to help contain and control the spread of potato wart and reassure domestic and international trading partners.

U.S. informed

The survey results have been provided to the United States Department of Agriculture’s Animal and Plant Health Inspection Service (USDA APHIS) and the Canadian Potato Council. Science will continue to inform the CFIA’s evidence-based decision-making in managing potato wart.

Monitoring for potato wart across the country is an important part of mitigating risk and ensuring that current outbreaks remain contained and controlled. Activities, such as the national survey for potato wart, and other ongoing investigations related to potato wart, demonstrate the CFIA’s continuing commitment to the important potato industry, which is the fifth-largest primary agriculture crop in Canada.

Quick facts

  • Potato wart is an extremely persistent fungus in soil that may reduce yield and potato tuber quality on farms. It can spread through the movement of soil, farm equipment, and potatoes from fields that have potato wart. As a pest regulated under the Plant Protection Act, its detection triggers measures to help contain and control the disease and prevent its spread. Potato wart poses no threat to human health.
  • As part of the 2022 national potato wart survey, nearly 1500 soil samples were collected from 77 fields across the country, excluding Newfoundland and Labrador, and PEI. No potato wart pathogen (Synchytrium endobioticum) was detected in any of the samples submitted as part of this survey.
  • The number of soil samples collected and analysed for potato wart fluctuates year to year based on identified export samples, the requirements of investigations, and follow-up surveillance under the Potato Wart Domestic Long Term Management Plan.

For more information on the Canadian Food Inspection Agency (CFIA) , visit

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