Phyto64n02 173 - American Phytopathological Society · Races, Pathogenicity and ... Phytopathology...
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Phyto64n02 173 - American Phytopathological Society · Races, Pathogenicity and ... Phytopathology 64:173-177 173 . 174 PHYTOPATHOLOGY ... The roots of 18-day-old seedlings of cabbage