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Resistance to Tobacco Black Shank in Nicotiana Species

^a Kentucky Tobacco Research and Development Center, University of Kentucky, Lexington, KY 40546
^b ARS-USDA, Mid South Area Forage-Animal Production Research Unit
^c Department of Agronomy, University of Kentucky, Lexington, KY 40546

View larger version (130K): [in a new window]   Fig. 1. Responses of Nicotiana species to Phytophthora parasitica var. nicotianae race 1, 10 to 14 d after inoculation. (A) Some plants were dead and some alive; (B) The roots of the alive plants were symptomatic, with either single (left) or multiple (right) roots being necrotic.