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Ministry of Agriculture, Food and Rural Affairs

Test Your Knowledge - Tomatoes

Test your disease identification skills by trying to distinguish between these commonly confused diseases

Leaf with dark circular lesions surrounded by yellow halos

This leaf has some dramatic symptoms.  There’s a lot of yellowing around the lesions.  Could it be...?


That's right!


These are early blight lesions.  The concentric rings in the lesions are diagnostic.  There is often a lot of leaf yellowing associated with early blight.

Bacterial diseases can also cause leaf yellowing, but bacterial speck lesions are much smaller and lack the pattern of concentric rings.

Bacterial speck symptoms on foliage

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