Decreasing yield and tuber quality, Potato spindle tuber viroid (PSTVd) causes a serious disease of potato. Canada maintains an intense seed potato certification program and symptoms of PSTVd have not been observed during Canadian field inspections for at least the last 25 years. The surveys for PSTVd in all 10 Canadian provinces and the absence of the disease in the field as determined by annual visual inspection meet the International Standards of Phytosanitary Measures for the Requirements for the Establishment of Pest Free Areas. Canada declares that PSTVd is absent within its potato industry.
For more information:
De Boer, S. H. and T. L. DeHaan. 2005. Absence of Potato spindle tuber viroid within the Canadian Potato Industry. Plant Dis. 89:910. Published on-line as DOI: 10.1094/PD-89-0910A.