This occurs in soils flooded for as little as two days. Plants are susceptible from germination until they are approximately 20 cm tall. Seedborne transmission is not considered important. Improved drainage will aid greatly in reducing incidence of infection. Diseases Return to Outline Sorghum Downy Mildew Sorghum Downy Mildew occurs mostly in southern states, the southern midwest and Nebraska.
Seedlings appear chlorotic and stunted .
White striping and phyllody may also occur. This disease is widespread and endemic on maize. It is more damaging on sweet corn than dent or field corn. Pathogen - Ustilago maydis Symptoms Common smut is easily recognized by the formation of galls on various parts of the plant, including ears , tassels , stalks and leaves. Galls form as the pathogen invades host tissue and induces hypertrophy and hyperplasia.