Cercospora leaf spot
scouted Aug. 25, 2026
- Scientific Name
- Cercospora kikuchii
- Background
- A soybean field, variety Axis 4.8 MG, in Washington County was being scouted, and it was observed that 50% of the field was affected by browning and yellowing between the veins. There is suspicion of SDS or stem rot. These symptoms were widespread. A sample was submitted to the PDIC for diagnosis.
- Conclusion
- The issue was identified as Cercospora blight of soybean. This disease is caused by the pathogen Cercospora kikuchii, and although it's common in soybeans, it rarely causes significant yield losses in North Carolina. Chemical management and cultural practices are both options to control Cercospora leaf blight.
- Resources