Does not kill plant or hurt fruit. Protect young plants and early fruit from cold injury. Fertilize according to a soil test. Early Blight Alternaria solani Occurs on foliage, stem and fruit. First observed as small brownish black lesions on older foliage.
Larger spots show concentric rings in the dark portion.
Sunscald on exposed fruit. Can cause severe defoliation, resulting in reduced fruit number and size. Older leaves are usually affected first. Sanitary measures are critical. A. solani survives on infected debris in the soil or on seed.