The seedling disease problems that have plagued some fields in Iowa have evolved into crown rot problems. Seedling pathogens can rot seeds, prevent emergence, and kill emerged seedlings, but some infections are not lethal and the surviving plants are stunted. As healthy nodal roots develop, many of these plants should recover. However, it has become clear that some plants are not recovering and remain stunted. Symptoms of crown rot are observed with many of these stunted plants. Plants were stunted and yellowed even with relatively mild crown decay.
Iowa State University
Munkvold, Gary P., "Crown rot symptoms common in corn" (2002). Integrated Crop Management News. 1720.
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