Early blight — Tomato

Symptoms

• Small, black lesions appear, mainly on older leaves. • Spots enlarge and develop characteristic concentric rings resembling a bull's-eye pattern. • The tissue surrounding the spots may turn yellow. • Under high temperature and humidity, large portions of the foliage may be killed. • Stem lesions resemble those on leaves and may girdle the plant near the soil line. • Fruits develop large lesions, usually near the calyx or stem attachment. • Fruit lesions may involve nearly the entire fruit and show concentric rings.