Spots on leaves cannot be easily distinguished from those of the bacterial spot disease. The leaf spots are small, dark brown to black in color, and may be surrounded by a yellow border. Only green fruit are susceptible to infection. The areas surrounding spots may be a more intense green color. Management practices for this disease are the same as for bacterial spot.
Bacterial wilt is a devastating disease of tomato, tobacco, and potato in southern states.
The bacterium survives freely in soil for extended periods of time and infection occurs through roots. Brown discoloration and decay are evident inside the stems of infected plants. The disease is easily diagnosed by suspending a clean, cut section of diseased stem in clear water. A white milky stream of bacterial cells and slime flow from infected stems into the water after a few minutes. Bacterial wilt - Infected plants rapidly wilt and die, without turning yellow first.