How to Manage Pests
UC Pest Management Guidelines
Exserohilum root rot causes brown lesions on primary roots and later on secondary roots of the first and second whorls. The affected roots become black and necrotic. Aboveground symptoms include wilting, stunting, and yellowing of leaves, but these symptoms are not always apparent.
The fungus is soilborne. Although factors influencing disease development are not well understood, stress caused by a fertility imbalance, overcrowding, etc. may favor disease development.
Good cultural practices will help to prevent this disease. There are no registered fungicides available for this disease.
UC IPM Pest Management Guidelines: Corn