Also infected by soil fertility components such as urea, NH2SO4, Po, and CaNO3. Control Measures - resistance and soil applied systemics. Return to Outline Common Rust Common Rust is widespread in the United States and elsewhere. It has not been considered a major problem on field, or dent corn in the U.S. since 1950. As with other rust diseases, damage is related to how early infection becomes established.
Sweet corn is much more susceptible than inbred seed corn or hybrid seed corn.
Pathogen - Puccinia sorghi a macrocyclic , heteroecious rust. The uredial and telial stages occur on maize. The alternate host is not common in the corn belt. Return to Outline Southern Corn Rust Southern Corn Rust is caused by Puccinia polysora . Alternate host for aecial stage has not been recorded.