Charcoal rot
scouted July 31, 2024
- Scientific Name
- Macrophomina phaseolina
- Background
- Soybeans in Hyde County variety, Asgrow 41XF2, were scouted and observed to be affected by localized root rot in 3% of the field. This area affected is one in which soybeans did not come up or are smaller and yellowish green. The plants in this affected area have little root systems. This area has been an issue in past years as well. Soil and nematode samples were taken and submitted to the PDIC and NCDA fro diagnosis.
- 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
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- No resources have been added.
