Phomopsis Blight
scouted Aug. 25, 2025
- Scientific Name
- Diaporthe sp.
- Background
- Soybeans in Wilkes County were being scouted, and it was observed that 10% of the field in random patches was being affected by wilting and yellowing between the veins. Last fungicide and insecticide spray at this site was 3 and a half weeks before the report, but the pattern doesn't seem to indicate chemical injury. Disease seems to be spreading from the original patches. Full pods are developing in unaffected parts of the field. A sample was submitted to the PDIC for diagnosis.
- Conclusion
- The cause was identified as seed decay and pod blight, also previously known as Phomopsis blight. It's not a common occurrence in North Carolina, but persistent arm wet weather preceding and at crop maturity may increase damage caused by this disease. Evidence in mature plants can be seen on the stems and pods, and it appears as black specks (pycnidia) in the stems and pods.
- Resources
