Summary
Common scab occurs ubiquitously even on unfarmed land. The literature indicates that harvested tubers become scabby by infection through soil containingStreptomyces scabies and not from scabby seed tubers. Furthermore, it is very difficult and requires many repeated plantings of scabby tubers to infest clean fields with common scab.
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Published as Journal Series Number 11316 of the University of Nebraska Agricultural Research Division.
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Pavlista, A.D. How important is common scab in seed potatoes?. American Potato Journal 73, 275–278 (1996). https://doi.org/10.1007/BF02849277
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DOI: https://doi.org/10.1007/BF02849277