Maydis Leaf Blight — Maize

Symptoms

Initial lesions are small and diamond-shaped. Lesions become elongated as the disease progresses. In the common O strain, lesions are generally tan or brown, elongated and restricted by the leaf veins, giving them a rectangular appearance. Lesions may merge and cause extensive drying or burning of leaf tissue. The historical T strain can produce larger, oval lesions and may also affect leaf sheaths and husks.