Cercospora leaf spot
scouted Aug. 31, 2026
- Scientific Name
- Cercospora kikuchii
- Background
- A soybean field, in Johnston County was being scouted, and it was observed that 100% of the field was affected by leaf spot. 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