Powdery mildew
scouted Oct. 25, 2024
- Scientific Name
- Erysiphe diffusa
- Background
- Soybeans in Johnston County were being scouted, and it was observed that 85% of the field was affected by widespread dieback. Nematode galls were present on roots; stress may have contributed to plants with green stems and pods.
- Conclusion
- The leaves from this field were diagnosed with soybean powdery mildew. This disease is a common leaf disease that is caused by an obligate biotrophic fungus, meaning that it can only grow on a living host. This disease favors cool conditions, which are rare during the North Carolina growing season.
- Resources
