Anthracnose
scouted Aug. 25, 2025
- Scientific Name
- Colletotrichum destructivum
- Background
- Soybeans in Alexander County were being scouted, and it was observed that in random patches in 30% of the field, plants were showing yellowing between the veins and also had white/red mold growing in the stem. This is a low and sunny site.
- Conclusion
- 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
