Cercospora leaf blight
scouted Sept. 2, 2025
- Scientific Name
- Cercospora kikuchii
- Background
- Soybeans planted on May 10th in Person County were being scouted, and it was observed that patches in 10% of the field were showing signs of browning and yellowing between the veins, as well as root rot and stem rot. Symptoms started three and a half weeks ago, with one spot appearing on the farm and then spreading to multiple places. There were no seed treatments applied, and fungicides haven't been applied either. A sample was submitted to the PDIC for diagnosis.
- Conclusion
- Cercospora kikuchiii. 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
