Charcoal rot

scouted July 21, 2022

Scientific Name
Macrophomina phaseolina
Background
Soybeans in Johnston county were scouted and observed 95% of the field was affected by blight, yellowing, browning, scorch/burn. The symptoms were widespread.
Conclusion
The issue was identified as charcoal rot of soybean, caused by Macrophomina phaseolina. It starts out with patches of stunted or wilted plants, while the infection can happen very early in the season, the symptoms usually appear after flowering.
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