Insect, Pest and Disease Control - Tobacco
Black shank is a widespread and destructive disease of tobacco in Tennessee. It was first identified in Robertson County in 1935 and has since spread to most tobacco-producing counties in the state. Burley, dark air-cured and dark fire-cured types of tobacco are all susceptible to black shank.
Black shank disease is caused by a soil-borne fungus, Phytophthora parasitica f. nicotianae. The fungus can survive in the soil for many years, even in the absence of tobacco.
"SP277-Q Black Shank of Tobacco," The University of Tennessee Agricultural Extension Service, SP277-Q 1M 6/05 (Rev) E12-4615-00-012-05 05-0414, http://trace.tennessee.edu/utk_agexcrop/39