The New Agriculture Network's on-line newsletter with seasonal advice for field crop and vegetable growers interested in organic agriculture.

Vol. 4, No. 3 - May 23, 2007

Management of Septoria leaf spot and early blight of tomato Dan Egel Extension Plant Pathologist Southwest Purdue Agricultural Center     Figure 1:  Early blight lesions on tomato can be recognized by the concentric rings pattern that can be often be observed in lesions. Figure 2:  Lesions of Septoria leaf spot are often a chocolate brown with a lighter gray color in the center of the lesion. It may be possible to observe dark fungal structures in the center of some lesions that represent the causal fungus.

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