Bacterial black stalk is caused by the same bacterium that causes hollow stalk, and it is favored by the same conditions. Bacterial black stalk does not always rot the pith of the stalk. Black streaks often develop along the stalk and major leaf veins. Tobacco that has been produced with excessive nitrogen and has been exposed to wet/rainy conditions is more vulnerable to this disease. Taking damaged plants to the barn can increase the chances of barn rot and further damage. (Photo: Kenneth Seebold, UK)

Leaf drop may occur as leaf axils rot from bacterial black stalk. (Photo: Kenneth Seebold, UK)

Leaves deteriorate as bacterial black stalk infections cause midveins to decay. (Photo: Kenneth Seebold, UK)