Anthracnose
scouted Sept. 16, 2026
- Scientific Name
- Colletotrichum destructivum
- Background
- A soybean field in Davidson County was being scouted, and it was observed that 95% of the field was affected by widespread leaf spot and stem rot. The field is a high, sunny site. There is black discoloration at the base of the plants and a black powdery fungus on the stems and roots. Suspected charcoal rot. A sample was submitted to the PDIC for diagnosis.
- Conclusion
- The issue was identified as Anthracnose, caused by Colletotrichum sp.. While usually a disease that shows in the stem, the petioles and pods with red to dark brown lesions. It can also cause leaf curling and reddening of the veins. Warm, wet weather favors infection and disease development. Crop rotation and tillage can reduce inoculum while foliar fungicides will reduce disease but it's usually not profitable.
- Resources