Charcoal rot
scouted July 26, 2024
- Scientific Name
- Macrophomina phaseolina
- Background
- Soybeans in Hyde County, variety Becks 4337XF, were scouted and observed to be affected by damping off in random parts of the field, with 10% of the field being affected. A sample was submitted to the PDIC for diagnosis. The field has been very wet due to the rain.
- Conclusion
- The issue was identified as charcoal rot of soybean, caused by Macrophomina phaseolina. It starts out with patches of stunted or wilted plants, and while the infection can happen very early in the season, the symptoms usually appear after flowering or when plants become stressed. It usually does not represent a major threat to production in the state. Crop rotation to non-host crops may help limit survival of the fungus in soils, and drought stress mitigation, when needed, may limit the severity of disease symptoms.
- Resources
