Anthracnose
scouted Aug. 25, 2026
- Scientific Name
- Colletotrichum destructivum
- Background
- A soybean field, variety Axis 4.8 MG, in Washington County was being scouted, and it was observed that 50% of the field was affected by browning and yellowing between the veins. There is suspicion of SDS or stem rot. These symptoms were widespread. 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, 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