The epiphytotic was also favored by weather conditions. Symptoms depends on race. Race T lesions are 1 x 3 cm on leaves of susceptible varieties and may also occur on husks and ears . Disease Cycle - The pathogen overwinters on infected crop debris and is dispersed by rainsplash and infected seed. Leaves are infected by direct penetration via appresoria or through stomates.
Infection is favor ed in warm, humid locales.
Yield loss may occur if disease is severe. Under moderate conditions the disease may predispose maize to stalk rots. The perfect stage is not seen on maize in the field, but may be produced under lab conditi ons. Several races are of the pathogen are known. Lesions may become tan with age and extensive s porulation may occur within lesons during humid weather.