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Stenocarpella (Diplodia) Ear Rot: Kentucky Corn IPM

Stenocarpella (Diplodia) Ear Rot


The more common ear rots occurring in Kentucky include: Stenocarpella (Diplodia) ear rot and Fusarium ear rot.

Stenocarpella (formerly known as Diplodia) ear rot is characterized by a white mold found growing between the kernels. The mold, which can cover the entire ear and become quite extensive, usually begins at the ear base and moves up from the shank. Black pycnidia (fungal fruiting bodies) may be scattered on husks, floral bracts and sides of kernels. Husks on ears may become bleached, with the inner husks adhering tightly to one another or to the ear. Infected ears are often lightweight and stand upright on the plant.

Diplodia Ear Rot


This ear rot is caused by the fungus Stenocarpella maydis. The disease is favored in fields with no-till cultivation that have been continuously planted in corn. The symptoms are generally not observed until late in the season, near harvest maturity.

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This site was created and is maintained by Pat Dillon, Department of Entomology, University of Kentucky, S-225 Agricultural Science Ctr North, Lexington, KY USA  40546-0091 (phone: 859/257-3571). Please send questions or suggestions to: pdillon@uky.edu
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