Fungicide Use Against Tar Spot on Corn

Tar spot, a fungal disease caused by Phyllachora maydis, is a growing concern for corn farmers across the U.S. This aggressive disease thrives in humid conditions and can cause yield losses of 30-50% if left unchecked.

🔬 How Fungicides Help
Fungicides remain the most effective tool in managing tar spot, but timing is critical. Farmers should apply fungicides at VT (tasseling) to R1 (silking) stages, as this is when corn is most vulnerable. Multiple applications may be necessary in high-risk areas.

🚁 Drones Improve Application Precision
Traditionally, ground sprayers or airplanes have been used to apply fungicides, but drones are changing the game. With drones, farmers can:
✅ Spray precisely where tar spot outbreaks occur
✅ Reduce soil compaction by eliminating the need for tractors
✅ Treat crops quickly, covering fields faster than manual spraying

🌱 Prevention & Best Practices

• Rotate crops to reduce fungal buildup.

• Use resistant hybrids where available.

• Monitor fields for early signs (black, tar-like spots on leaves).

• Apply fungicides proactively, especially in wet conditions.

With early detection, proper fungicide use, and drone technology, farmers can effectively manage tar spot and protect their yields from this destructive disease.