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Gibberella Ear Rot


© Purdue University, Plant and Pest Diagnostic Laboratory

Pathogen(s) causing disease:

Gibberella zeae, also known as Fusarium graminearum

Symptoms:

Reddish or pink mold that usually starts at the tip of the ear. Husks may adhere tightly to the ear (hybrid dependent). 

Conditions:

Cool wet weather within first 21 days after silking favors the development of this disease. Continued development of the mold also depends on subsequent cool, wet weather. Optimum temperatures for disease development are 65-70°F.

Management:

Resistant hybrids, crop rotation, harvest early to prevent continued mold growth in the field, clean plowing. Dry corn to 15 per cent moisture content and below to prevent further mold growth in storage.

Sources:

Purdue University
The Ohio State University

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