bacterial canker of tomato
Bacterial canker-the first symptom observed is often the marginal necrosis and chlorosis on leaves. If stems are cut low to the ground, an internal discoloration is often observed. Fruit may also have a distinctive birds-eye lesion. This may be our most important tomato disease. May occur in field or greenhouse tomatoes.
Figure 1. Necrosis and chlorosis on leaf margin, also known and ‘firing,’ due to bacterial canker. This is a very common symptom. 
Figure 2. Bacterial canker in greenhouse has resulted in stunting and necrosis. 
Figure 3. Bird’s eye spot infection on tomato fruit as a result of infection with bacterial canker. This symptom may not necessarily occur. 
Figure 4. Vascular discoloration of tomato stem due to bacterial canker. This symptoms indicates that the infection is systemic. 
Figure 5. Fruit symptoms of bacterial canker.