Abstract
White potato cultivars (13) plus 247 breeding clones from the USDA [US Department of Agriculture] Potato Breeding Program were screened for resistance to F. roseum ''Sambucinum'' in 1973-1977. Varying degrees of resistance were observed and 1 clone, B7200-33, appeared immune. In 1978, 30 clones from the USDA Breeding Program and 93 entries from Sangerville Farm, Maine [USA] Department of Agriculture, were screened for resistance to F. roseum ''Sambucinum'' and F. solani ''Coeruleum''; only B7200-33 was highly resistant to both Fusarium spp. No correlation was found between amount of sprout growth and Fusarium resistance.

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