Gibberella Stalk RotCORN081.JPG

Gibberella stalk rot

Area of impact: Stalk

Description: The inner stalk can deteriorate leaving only reddish vascular bundles. Small black specks that can be scraped with a fingernail will be seen on the stalk surface.

Pathogen involved: Gibberella zeae (a fungus)

Timing/Conditions: Infection occurs after pollination during warm wet weather.

Contributing factors: Insect injury and plant stress increase risk of infection.

Management practices: Plant resistant hybrids, maintain fertility, plant proper population numbers, reduce plant stress and control stalk-boring insects.

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