Maize eye spot
Kabatiella Zeae
Eye spot
Symptoms:
- Initial lesions are small, circular (1 to 4 mm diameter) and water soaked, with yellow halos
- Lesions develop into an "eyespot", which is a tan spot surrounded by a brown to purple ring and yellow halo
- These lesions most often will appear in patches on leaves, and can join together to form large necrotic areas
- Lesions will mainly be concentrated on the upper surface of corn leaves, but can sometimes be found on leaf sheaths and husks
- These symptoms may be confused with lesions of Curvularia leaf spot, a physiological leaf spot, or a genetic leaf spot.
Pathogen Involved:
- Kabatiella zeae (a fungus)
- Overwinters in corn residue
- Corn is the only reported host
Time of Occurrence:
- The initial lesions can occur as early as silking or as late as corn maturity.
Conditions Favoring Disease:
- Cool temperatures and humid conditions
- Continuous corn
- Conservation tillage.
Disease Management:
- Use resistant corn hybrids
- Crop rotation
- Reduction of corn residue with tillage where appropriate.
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