Late Blight -- Irish Potato Famine Fungus -- Attacks U.S. Northeast Gardens And Farms Hard

 ScienceDaily (July 5, 2009) — Home gardeners beware: This year, late
blight -- a destructive infectious disease that caused the Irish
potato famine in the 1840s -- is killing tomato and potato plants in
gardens and on commercial farms in the eastern United States. In
addition, basil downy mildew is affecting plants in the Northeast.

<more>  http://www.sciencedaily.com/releases/2009/07/090701163647.htm

 
This article does not mention the vector of volunteer potatoes, but,
in many agricultural settings volunteer potatoes are considered a high
risk for blight and other diseases.

Gardeners need to be cautious about nurturing volunteer potatoes.

Ray
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Sometimes an old thing is not a good thing...