Holcus Leaf Spot
scouted July 8, 2025
- Background
- In Rowan county, corn was scouted at VT growth stage and some tan spots with water soaked edges were noticed.
- Conclusion
- The spots were identified by a Extension specialist in the field. Holcus spot is a bacterial disease that shows up early in wet, warm conditions. It begins as circular, oval, or irregular dark green, water-soaked spots. As they dry, these lesions turn light tan to white, often with a thin, papery texture, and may develop light brown to reddish margins surrounded by yellow halos. The severity can vary wildly from leaf to leaf.
- Resources
