Anthracnose
scouted Aug. 20, 2025
- Background
- Soybeans in Franklin County were scouted, and it was observed that plants were starting to show signs of reddening and browning. %% of the field is affected, and it's in a low area of the field. A sample was submitted to the PDIC for diagnosis.
- Conclusion
- Colletotrichum sp. The cause of the blight spots on the leaves was identified as Anthracnose, caused by Colletotrichum. While usually a disease that shows in the stem 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
