Cercospora leaf spot
scouted Aug. 12, 2026
- Scientific Name
- Cercospora kikuchii
- Background
- A soybean field in Moore County was being scouted, and it was observed that 40% of the field was affected by marginal yellowing, stunting, and wilting in patches in random areas of the field. Iron deficiency is suspected. The field is a dry and sunny site. 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