Anthracnose
scouted Aug. 20, 2025
- Background
- Soybeans in Franklin County were scouted, and it was observed that in 5% of the field, entire plants were affected by general yellowing. A sample was submitted to the PDIC for diagnosis. The field also was in a low area.
- Conclusion
- Colletotrichum destructivum. The cause of the blight spots on the leaves was identified as Anthracnose, caused by Colletotrichum. While usually a disease that shows in the stems and the petioles, 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
