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canker n NID ~ 1 4 c 'potato wart'; cp EDD sb2 3 'kind of dry rot in turnips.' A disease attacking potato tubers caused by Phytophthora infestans.
   1911 Tribune Christmas No [18] The canker in the potato is a very serious thing, and too much care cannot be taken to exterminate it. 1964 Can Dept of Agri [pamphlet] A serious disease of potatoes commonly known as potato wart, canker or black wart occurs at several points in Newfoundland but is not known to be in any other province. T 411/4-67 After using the land for so long, we had what we called canker would grow on the potato.

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